{"id":24289,"date":"2022-03-05T02:37:39","date_gmt":"2022-03-05T02:37:39","guid":{"rendered":"https:\/\/agsci.colostate.edu\/divi-agbio\/?post_type=ipm-pests&#038;p=24289"},"modified":"2025-05-01T15:52:35","modified_gmt":"2025-05-01T15:52:35","slug":"grasshopper","status":"publish","type":"ipm-pests","link":"https:\/\/agsci.colostate.edu\/agbio\/ipm-pests\/grasshopper\/","title":{"rendered":"Grasshoppers in gardens and small acreage"},"content":{"rendered":"<p>[et_pb_section fb_built=&#8221;1&#8243; admin_label=&#8221;section&#8221; _builder_version=&#8221;4.16&#8243; global_colors_info=&#8221;{}&#8221;][et_pb_row column_structure=&#8221;1_2,1_2&#8243; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;1_2&#8243; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text admin_label=&#8221;squiggle-left&#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; header_font=&#8221;||||||||&#8221; header_text_align=&#8221;left&#8221; header_font_size=&#8221;22px&#8221; width=&#8221;100%&#8221; module_alignment=&#8221;center&#8221; custom_margin=&#8221;3%||22px||false|false&#8221; custom_padding=&#8221;||||false|false&#8221; saved_tabs=&#8221;all&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221; global_module=&#8221;23371&#8243;]<\/p>\n<p style=\"text-align: left;\">\t\t<div style=\"width: 146px; height: 8px; max-width: 100%; position: relative;\">\n\t\t\t<svg\n                width=\"100%\"\n                height=\"100%\"\n                xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n                x=\"0\" y=\"0\"\n                viewBox=\"0 0 145.1 8\"\n                xml:space=\"preserve\"\n                style=\"position: absolute; top: 0\"\n            >\n\t\t\t\t<path\n\t\t\t\t\td=\"M144.1 4c-3.6 3.3-10.7 3.3-14.3 0S119.1.7 115.5 4s-10.7 3.3-14.3 0S90.4.7 86.9 4 76.1 7.3 72.6 4 61.8.7 58.3 4 47.5 7.3 43.9 4 33.2.7 29.6 4 18.9 7.3 15.3 4 4.6.7 1 4\"\n\t\t\t\t\tfill=\"none\"\n\t\t\t\t\tstroke=\"#f15727\"\n\t\t\t\t\tstroke-width=\"3\"\n\t\t\t\t\/>\n\t\t\t<\/svg>\n\t\t<\/div>\n<p>[\/et_pb_text][et_pb_text _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; header_line_height=&#8221;1.3em&#8221; header_2_font_size=&#8221;24px&#8221; header_2_line_height=&#8221;1.3em&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h1><span class=\"TextRun SCXW189856203 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-contrast=\"none\"><span class=\"NormalTextRun SCXW189856203 BCX0\">Grasshoppers in Gardens and Small Acreage <\/span><\/span><\/h1>\n<p>Order: <span data-contrast=\"auto\">Orthoptera<\/span><br \/>Family: <span data-contrast=\"auto\">Acrididae<\/span><\/p>\n<p><span class=\"TextRun SCXW35723972 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW35723972 BCX0\">Grasshoppers<\/span><span class=\"NormalTextRun SCXW35723972 BCX0\">\u00a0are closely related to crickets and katydids. Over 100 species of grasshoppers occur in Colorado and their populations fluctuate from year to\u00a0year. They\u00a0may cause serious damage to yards and fields during outbreaks.\u00a0The table below shows primary grasshopper species found in Colorado<\/span><span class=\"NormalTextRun SCXW35723972 BCX0\">.<\/span><span class=\"NormalTextRun SCXW35723972 BCX0\">\u00a0<\/span><\/span><span class=\"EOP SCXW35723972 BCX0\" data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:240}\">\u00a0<\/span><\/p>\n<p>[\/et_pb_text][\/et_pb_column][et_pb_column type=&#8221;1_2&#8243; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_blurb title=&#8221;Quick Facts&#8221; use_icon=&#8221;on&#8221; font_icon=&#8221;&#xf188;||fa||900&#8243; icon_color=&#8221;#F15625&#8243; image_icon_width=&#8221;36px&#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; header_level=&#8221;h3&#8243; header_font=&#8221;||||||||&#8221; header_text_align=&#8221;center&#8221; header_font_size=&#8221;28px&#8221; header_line_height=&#8221;1.3em&#8221; background_color=&#8221;#FEBD3B&#8221; custom_padding=&#8221;7%|4%|7%|4%|true|true&#8221; hover_enabled=&#8221;0&#8243; global_colors_info=&#8221;{}&#8221; sticky_enabled=&#8221;0&#8243;]<\/p>\n<ul>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"5\" data-aria-posinset=\"1\" data-aria-level=\"1\"><span data-contrast=\"none\">Grasshoppers are difficult pests to control because they are highly mobile.<\/span><\/li>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"5\" data-aria-posinset=\"1\" data-aria-level=\"1\"><span data-contrast=\"none\">All grasshoppers lay their eggs in soil.<\/span><\/li>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"5\" data-aria-posinset=\"1\" data-aria-level=\"1\"><span data-contrast=\"none\">During periods when local outbreaks are developing, control usually involves using sprays or baits.<\/span><\/li>\n<\/ul>\n<p>[\/et_pb_blurb][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=&#8221;1_3,1_3,1_3&#8243; make_equal=&#8221;on&#8221; admin_label=&#8221;row&#8221; _builder_version=&#8221;4.27.4&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; hover_enabled=&#8221;0&#8243; global_colors_info=&#8221;{}&#8221; sticky_enabled=&#8221;0&#8243; custom_padding=&#8221;45px|||||&#8221;][et_pb_column type=&#8221;1_3&#8243; _builder_version=&#8221;4.16&#8243; custom_padding=&#8221;|||&#8221; global_colors_info=&#8221;{}&#8221; custom_padding__hover=&#8221;|||&#8221;][et_pb_blurb image=&#8221;https:\/\/agsci.colostate.edu\/divi-agbio\/wp-content\/uploads\/sites\/127\/2022\/03\/feeding-injury-on-onion.jpeg&#8221; alt=&#8221;Three species of white grubs.&#8221; _builder_version=&#8221;4.21.0&#8243; _module_preset=&#8221;default&#8221; body_line_height=&#8221;1.4em&#8221; image_icon_custom_margin=&#8221;||-22px||false|false&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p>Feeding injury on an onion. <em>Image credit: Whitney Cranshaw, Colorado State University, Bugwood.org<\/em><\/p>\n<p>[\/et_pb_blurb][\/et_pb_column][et_pb_column type=&#8221;1_3&#8243; _builder_version=&#8221;4.16&#8243; custom_padding=&#8221;|||&#8221; global_colors_info=&#8221;{}&#8221; custom_padding__hover=&#8221;|||&#8221;][et_pb_blurb image=&#8221;https:\/\/agsci.colostate.edu\/divi-agbio\/wp-content\/uploads\/sites\/127\/2022\/03\/two-striped-grasshopper.jpeg&#8221; alt=&#8221;Masked chafer adults.&#8221; _builder_version=&#8221;4.21.0&#8243; _module_preset=&#8221;default&#8221; body_line_height=&#8221;1.4em&#8221; image_icon_custom_margin=&#8221;||-22px||false|false&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p>Two striped grasshopper. <em>Image credit: Whitney Cranshaw, Colorado State University, Bugwood.org<\/em><\/p>\n<p>[\/et_pb_blurb][\/et_pb_column][et_pb_column type=&#8221;1_3&#8243; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_blurb image=&#8221;https:\/\/agsci.colostate.edu\/divi-agbio\/wp-content\/uploads\/sites\/127\/2022\/03\/Twostriped-grasshopper-nymphs.jpeg&#8221; alt=&#8221;Japanese Beetle Larva.&#8221; _builder_version=&#8221;4.21.0&#8243; _module_preset=&#8221;default&#8221; body_line_height=&#8221;1.4em&#8221; image_icon_custom_margin=&#8221;||-22px||false|false&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p>Nymphs of two striped grasshopper. <em>Image credit: Whitney Cranshaw, Colorado State University, Bugwood.org<\/em><\/p>\n<p>[\/et_pb_blurb][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; background_color=&#8221;#F1F1F1&#8243; global_colors_info=&#8221;{}&#8221;][et_pb_row _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text admin_label=&#8221;squiggle-left&#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; header_font=&#8221;||||||||&#8221; header_text_align=&#8221;left&#8221; header_font_size=&#8221;22px&#8221; width=&#8221;100%&#8221; module_alignment=&#8221;center&#8221; custom_margin=&#8221;3%||22px||false|false&#8221; custom_padding=&#8221;||||false|false&#8221; saved_tabs=&#8221;all&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221; global_module=&#8221;23371&#8243;]<\/p>\n<p style=\"text-align: left;\">\t\t<div style=\"width: 146px; height: 8px; max-width: 100%; position: relative;\">\n\t\t\t<svg\n                width=\"100%\"\n                height=\"100%\"\n                xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n                x=\"0\" y=\"0\"\n                viewBox=\"0 0 145.1 8\"\n                xml:space=\"preserve\"\n                style=\"position: absolute; top: 0\"\n            >\n\t\t\t\t<path\n\t\t\t\t\td=\"M144.1 4c-3.6 3.3-10.7 3.3-14.3 0S119.1.7 115.5 4s-10.7 3.3-14.3 0S90.4.7 86.9 4 76.1 7.3 72.6 4 61.8.7 58.3 4 47.5 7.3 43.9 4 33.2.7 29.6 4 18.9 7.3 15.3 4 4.6.7 1 4\"\n\t\t\t\t\tfill=\"none\"\n\t\t\t\t\tstroke=\"#f15727\"\n\t\t\t\t\tstroke-width=\"3\"\n\t\t\t\t\/>\n\t\t\t<\/svg>\n\t\t<\/div>\n<p>[\/et_pb_text][et_pb_text _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; header_2_font_size=&#8221;30px&#8221; header_2_line_height=&#8221;1.3em&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<table width=\"748\" data-tablestyle=\"MsoTableGrid\" data-tablelook=\"1696\">\n<tbody>\n<tr>\n<td colspan=\"3\" data-celllook=\"4369\">\n<h2>Primary grasshoppers that damage gardens\u00a0and small acreage pasture areas in Colorado\u00a0<\/h2>\n<\/td>\n<\/tr>\n<tr>\n<td data-celllook=\"4369\"><b><span data-contrast=\"auto\">Common Name<\/span><\/b><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559740&quot;:259}\">\u00a0<\/span><\/td>\n<td data-celllook=\"4369\"><b><span data-contrast=\"auto\">Scientific Name<\/span><\/b><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559740&quot;:259}\">\u00a0<\/span><\/td>\n<td data-celllook=\"4369\"><b><span data-contrast=\"auto\">Comments<\/span><\/b><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559740&quot;:259}\">\u00a0<\/span><\/td>\n<\/tr>\n<tr>\n<td data-celllook=\"4369\"><span data-contrast=\"auto\">Differential grasshopper<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559740&quot;:259}\">\u00a0<\/span><\/td>\n<td data-celllook=\"4369\"><i><span data-contrast=\"auto\">Melanoplus\u00a0differentialis<\/span><\/i><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559740&quot;:259}\">\u00a0<\/span><\/td>\n<td data-celllook=\"4369\"><span data-contrast=\"auto\">Often one of the first\u00a0grasshoppers found moving into<\/span><br \/><span data-contrast=\"auto\">gardens and one of the largest in the genus\u00a0<\/span><i><span data-contrast=\"auto\">Melanoplus<\/span><\/i><span data-contrast=\"auto\">.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559740&quot;:259}\">\u00a0<\/span><\/td>\n<\/tr>\n<tr>\n<td data-celllook=\"4369\"><span data-contrast=\"auto\">Migratory grasshopper<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559740&quot;:259}\">\u00a0<\/span><\/td>\n<td data-celllook=\"4369\"><i><span data-contrast=\"auto\">Melanoplus\u00a0sanguinipes<\/span><\/i><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559740&quot;:259}\">\u00a0<\/span><\/td>\n<td data-celllook=\"4369\"><span data-contrast=\"auto\">Often the most damaging species to croplands.\u00a0<\/span><span data-contrast=\"auto\">Any early\u00a0hatching species and capable of long migration flight.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559740&quot;:259}\">\u00a0<\/span><\/td>\n<\/tr>\n<tr>\n<td data-celllook=\"4369\"><span data-contrast=\"auto\">Twostriped\u00a0grasshopper<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559740&quot;:259}\">\u00a0<\/span><\/td>\n<td data-celllook=\"4369\"><i><span data-contrast=\"auto\">Melanoplus\u00a0bivittatus<\/span><\/i><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559740&quot;:259}\">\u00a0<\/span><\/td>\n<td data-celllook=\"4369\"><span data-contrast=\"auto\">Often the most common species damaging gardens;\u00a0it migrates<\/span><br \/><span data-contrast=\"auto\">from empty lots, roadsides, and other undisturbed sites.\u00a0Twostriped\u00a0grasshopper\u00a0often<\/span><br \/><span data-contrast=\"auto\">hatches in late spring, a few weeks later than many grasshoppers.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559740&quot;:259}\">\u00a0<\/span><\/td>\n<\/tr>\n<tr>\n<td data-celllook=\"4369\"><span data-contrast=\"auto\">Redlegged\u00a0grasshopper<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559740&quot;:259}\">\u00a0<\/span><\/td>\n<td data-celllook=\"4369\"><i><span data-contrast=\"auto\">Melanoplus\u00a0femurrubrum<\/span><\/i><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559740&quot;:259}\">\u00a0<\/span><\/td>\n<td data-celllook=\"4369\"><span data-contrast=\"auto\">A widely distributed grasshopper that feeds on many\u00a0garden plants. It tends to be most abundant in moist sites and is\u00a0one of the later hatching species.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559740&quot;:259}\">\u00a0<\/span><\/td>\n<\/tr>\n<tr>\n<td data-celllook=\"4369\"><span data-contrast=\"auto\">Clearwinged\u00a0grasshopper<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559740&quot;:259}\">\u00a0<\/span><\/td>\n<td data-celllook=\"4369\"><i><span data-contrast=\"auto\">Camnula\u00a0pellucida<\/span><\/i><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559740&quot;:259}\">\u00a0<\/span><\/td>\n<td data-celllook=\"4369\"><span data-contrast=\"auto\">The primary species present in recent outbreaks reported<\/span><br \/><span data-contrast=\"auto\">in areas of the West Slope and around Steamboat Springs. An early\u00a0hatching grasshopper that restricts feeding to grasses.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559740&quot;:259}\">\u00a0<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.21.0&#8243; _module_preset=&#8221;default&#8221; background_color=&#8221;#FFFFFF&#8221; min_height=&#8221;414.6px&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_row _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text admin_label=&#8221;squiggle-left&#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; header_font=&#8221;||||||||&#8221; header_text_align=&#8221;left&#8221; header_font_size=&#8221;22px&#8221; width=&#8221;100%&#8221; module_alignment=&#8221;center&#8221; custom_margin=&#8221;3%||22px||false|false&#8221; custom_padding=&#8221;||||false|false&#8221; saved_tabs=&#8221;all&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221; global_module=&#8221;23371&#8243;]<\/p>\n<p style=\"text-align: left;\">\t\t<div style=\"width: 146px; height: 8px; max-width: 100%; position: relative;\">\n\t\t\t<svg\n                width=\"100%\"\n                height=\"100%\"\n                xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n                x=\"0\" y=\"0\"\n                viewBox=\"0 0 145.1 8\"\n                xml:space=\"preserve\"\n                style=\"position: absolute; top: 0\"\n            >\n\t\t\t\t<path\n\t\t\t\t\td=\"M144.1 4c-3.6 3.3-10.7 3.3-14.3 0S119.1.7 115.5 4s-10.7 3.3-14.3 0S90.4.7 86.9 4 76.1 7.3 72.6 4 61.8.7 58.3 4 47.5 7.3 43.9 4 33.2.7 29.6 4 18.9 7.3 15.3 4 4.6.7 1 4\"\n\t\t\t\t\tfill=\"none\"\n\t\t\t\t\tstroke=\"#f15727\"\n\t\t\t\t\tstroke-width=\"3\"\n\t\t\t\t\/>\n\t\t\t<\/svg>\n\t\t<\/div>\n<p>[\/et_pb_text][et_pb_text _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; header_2_font_size=&#8221;32px&#8221; header_2_line_height=&#8221;1.3em&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h2>Life history and habits<\/h2>\n<p><span class=\"TextRun SCXW4641562 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-contrast=\"none\"><span class=\"NormalTextRun SCXW4641562 BCX0\">All grasshoppers lay their eggs in soil, in the form of tight clustered pods. Dry soils undisturbed by tillage or irrigation are preferred. For most species, eggs hatch in mid to late spring, varying with soil temperature.\u00a0<\/span><\/span><span class=\"TextRun Highlight SCXW4641562 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-contrast=\"none\"><span class=\"NormalTextRun SCXW4641562 BCX0\">At egg hatch the tiny first stage nymphs move to the surface and seek tender foliage on which to feed. The first few days are critical to survival. <\/span><\/span><\/p>\n<p><span class=\"TextRun Highlight SCXW4641562 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-contrast=\"none\"><span class=\"NormalTextRun SCXW4641562 BCX0\">Adverse weather or absence of suitable foods can cause high mortality. Surviving grasshoppers continue to develop over the next several weeks, usually molting through five or six stages, before ultimately reaching the adult form. <\/span><\/span><\/p>\n<p><span class=\"TextRun Highlight SCXW4641562 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-contrast=\"none\"><span class=\"NormalTextRun SCXW4641562 BCX0\">Croplands adjacent to rangelands can experience high rates of grasshopper immigration, resulting in significant crop losses. In western North America, severe but localized outbreaks occur every year.<\/span><\/span><\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.21.0&#8243; _module_preset=&#8221;default&#8221; background_color=&#8221;#F1F1F1&#8243; global_colors_info=&#8221;{}&#8221;][et_pb_row _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text admin_label=&#8221;squiggle-left&#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; header_font=&#8221;||||||||&#8221; header_text_align=&#8221;left&#8221; header_font_size=&#8221;22px&#8221; width=&#8221;100%&#8221; module_alignment=&#8221;center&#8221; custom_margin=&#8221;3%||22px||false|false&#8221; custom_padding=&#8221;||||false|false&#8221; saved_tabs=&#8221;all&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221; global_module=&#8221;23371&#8243;]<\/p>\n<p style=\"text-align: left;\">\t\t<div style=\"width: 146px; height: 8px; max-width: 100%; position: relative;\">\n\t\t\t<svg\n                width=\"100%\"\n                height=\"100%\"\n                xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n                x=\"0\" y=\"0\"\n                viewBox=\"0 0 145.1 8\"\n                xml:space=\"preserve\"\n                style=\"position: absolute; top: 0\"\n            >\n\t\t\t\t<path\n\t\t\t\t\td=\"M144.1 4c-3.6 3.3-10.7 3.3-14.3 0S119.1.7 115.5 4s-10.7 3.3-14.3 0S90.4.7 86.9 4 76.1 7.3 72.6 4 61.8.7 58.3 4 47.5 7.3 43.9 4 33.2.7 29.6 4 18.9 7.3 15.3 4 4.6.7 1 4\"\n\t\t\t\t\tfill=\"none\"\n\t\t\t\t\tstroke=\"#f15727\"\n\t\t\t\t\tstroke-width=\"3\"\n\t\t\t\t\/>\n\t\t\t<\/svg>\n\t\t<\/div>\n<p>[\/et_pb_text][et_pb_text _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; header_2_font_size=&#8221;32px&#8221; header_2_line_height=&#8221;1.3em&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h2>Injury<\/h2>\n<p><span data-contrast=\"none\">Grasshoppers have chewing mouthparts\u00a0and can defoliate entire plants.\u00a0Food habits vary between species of grasshoppers, where some primarily feed on grasses or sedges, while others prefer broadleaved plants. Lettuce, carrots, beans, sweet corn and onions are some crops that are favored, while squash, peas, and tomatoes tend to be avoided.\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">Most grasshoppers prefer younger, tender foliage.\u00a0They\u00a0can\u00a0also\u00a0be\u00a0a\u00a0significant pests of field crops and rangeland in years when their populations are extremely high.\u00a0<\/span><span data-contrast=\"none\">Surveys of grasshoppers can be very useful in anticipating problems and treating appropriately. <\/span><\/p>\n<p><span data-contrast=\"none\">Numbers of grasshoppers present in late summer and early fall can be a good indicator of problems the subsequent year.\u00a0<\/span><span data-contrast=\"none\">Predicting outbreaks is complex,\u00a0and the\u00a0<\/span><a href=\"https:\/\/www.ars.usda.gov\/plains-area\/sidney-mt\/northern-plains-agricultural-research-laboratory\/pest-management-research\/pmru-docs\/grasshoppers-their-biology-identification-and-management\/\"><span data-contrast=\"none\">USDA ARS in Montana<\/span><\/a><span data-contrast=\"none\"> has excellent\u00a0resources including a prediction model\u00a0updated each year.<\/span><\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.21.0&#8243; _module_preset=&#8221;default&#8221; background_color=&#8221;#FFFFFF&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_row _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text admin_label=&#8221;squiggle-left&#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; header_font=&#8221;||||||||&#8221; header_text_align=&#8221;left&#8221; header_font_size=&#8221;22px&#8221; width=&#8221;100%&#8221; module_alignment=&#8221;center&#8221; custom_margin=&#8221;3%||22px||false|false&#8221; custom_padding=&#8221;||||false|false&#8221; saved_tabs=&#8221;all&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221; global_module=&#8221;23371&#8243;]<\/p>\n<p style=\"text-align: left;\">\t\t<div style=\"width: 146px; height: 8px; max-width: 100%; position: relative;\">\n\t\t\t<svg\n                width=\"100%\"\n                height=\"100%\"\n                xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n                x=\"0\" y=\"0\"\n                viewBox=\"0 0 145.1 8\"\n                xml:space=\"preserve\"\n                style=\"position: absolute; top: 0\"\n            >\n\t\t\t\t<path\n\t\t\t\t\td=\"M144.1 4c-3.6 3.3-10.7 3.3-14.3 0S119.1.7 115.5 4s-10.7 3.3-14.3 0S90.4.7 86.9 4 76.1 7.3 72.6 4 61.8.7 58.3 4 47.5 7.3 43.9 4 33.2.7 29.6 4 18.9 7.3 15.3 4 4.6.7 1 4\"\n\t\t\t\t\tfill=\"none\"\n\t\t\t\t\tstroke=\"#f15727\"\n\t\t\t\t\tstroke-width=\"3\"\n\t\t\t\t\/>\n\t\t\t<\/svg>\n\t\t<\/div>\n<p>[\/et_pb_text][et_pb_text _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; header_2_font_size=&#8221;32px&#8221; header_2_line_height=&#8221;1.3em&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h2>Cultural control<\/h2>\n<p>Habitat manipulation involves altering food quality, manipulating plant composition, and increasing the abundance of natural enemies. Twice-over rotational grazing reduces the availability of food and has been shown to reduce grasshopper densities in native prairies by reducing development and survival rates of nymphs, reducing forage consumption, and supporting fewer nymphs of outbreak species.<\/p>\n<h2>Biological control<\/h2>\n<p>The most important factors in grasshopper populations are weather-related, particularly around the time of egg hatch. For example, cold, wet weather is very destructive to newly hatched grasshoppers. Many species of <a href=\"https:\/\/extension.colostate.edu\/docs\/pubs\/insect\/05524.pdf\">blister beetles<\/a> develop on grasshopper egg pods. Adult robber flies are common predators of grasshoppers during summer and other flies develop as internal parasites of grasshoppers. Many birds, notably horned larks and kestrels, feed heavily on grasshoppers.<\/p>\n<p>Grasshoppers are also frequently eaten by coyotes. Grasshoppers may also be affected by pathogens. A fungus (<em>Entomophthora grylli<\/em>) infects grasshoppers causing them to move upwards and cling to plants shortly before they kill the insect host. Stiff, dead grasshoppers found stuck to a grass stem or twig indicate infection with this disease. A nematode (<em>Mermis nigriscens<\/em>) also occasionally attacks and develops in grasshoppers. Both the fungus disease and nematode parasite are favored by wet weather.<\/p>\n<p>Baits containing the protozoan organism<em> Nosema locustae<\/em> are a biological control option that may be considered for treating grasshopper breeding sites. Because it is selective in effects, only affecting grasshoppers, its use is sometimes considered desirable. However, there are some limitations to <em>N. locustae<\/em> baits. Only young grasshoppers are susceptible, and it cannot be used effectively after adult migrations have occurred. Often it is most effectively used in a long-term grasshopper management program, in combination with other controls. The baits are also perishable and are best kept refrigerated before use.<\/p>\n<h2>Chemical control<\/h2>\n<p>Treatments should be directed at young grasshoppers and nearby vegetation present in breeding sites. At lower altitudes, this often occurs in May; early June may be the optimal time for grasshoppers at higher elevations. Insecticide treatments do not need to completely cover the area since grasshoppers are mobile. Insecticides applied as bands covering 50 percent of the area, or even less, have proved very effective for control of grasshoppers in rangelands.<\/p>\n<p>To be successful, baits and sprays need to be applied during developing stages and concentrated at sites where egg laying occurs. The ability to control grasshoppers declines as they develop and migrate. Alternately, certain baits can be broadcast. Bait formulations are made by mixing the insecticide with bran or another carrier. Baits must be re-applied after rain.<\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.21.0&#8243; _module_preset=&#8221;default&#8221; background_color=&#8221;#F1F1F1&#8243; global_colors_info=&#8221;{}&#8221;][et_pb_row _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_icon font_icon=&#8221;&#xf0ea;||fa||900&#8243; icon_width=&#8221;60px&#8221; align=&#8221;left&#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_icon][et_pb_text _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; header_2_font_size=&#8221;30px&#8221; header_2_line_height=&#8221;1.3em&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h2>CSU Extension Fact Sheet<\/h2>\n<p>Download or view the CSU Extension&#8217;s PDF fact sheet for your reference <a href=\"https:\/\/extension.colostate.edu\/docs\/pubs\/insect\/05536.pdf\">here<\/a>.<\/p>\n<p>[\/et_pb_text][et_pb_text admin_label=&#8221;Squiggle&#8221; _builder_version=&#8221;4.17.4&#8243; _module_preset=&#8221;default&#8221; header_font=&#8221;||||||||&#8221; header_text_align=&#8221;left&#8221; header_font_size=&#8221;22px&#8221; custom_padding=&#8221;||||false|false&#8221; saved_tabs=&#8221;all&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n\t\t<div style=\"width: 146px; height: 8px; max-width: 100%; position: relative;\">\n\t\t\t<svg\n                width=\"100%\"\n                height=\"100%\"\n                xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n                x=\"0\" y=\"0\"\n                viewBox=\"0 0 145.1 8\"\n                xml:space=\"preserve\"\n                style=\"position: absolute; top: 0\"\n            >\n\t\t\t\t<path\n\t\t\t\t\td=\"M144.1 4c-3.6 3.3-10.7 3.3-14.3 0S119.1.7 115.5 4s-10.7 3.3-14.3 0S90.4.7 86.9 4 76.1 7.3 72.6 4 61.8.7 58.3 4 47.5 7.3 43.9 4 33.2.7 29.6 4 18.9 7.3 15.3 4 4.6.7 1 4\"\n\t\t\t\t\tfill=\"none\"\n\t\t\t\t\tstroke=\"#f15727\"\n\t\t\t\t\tstroke-width=\"3\"\n\t\t\t\t\/>\n\t\t\t<\/svg>\n\t\t<\/div>\n\t\t\n<p>[\/et_pb_text][et_pb_text _builder_version=&#8221;4.24.2&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h2>References<\/h2>\n<p><strong>Branson, D., Joern, A., Sword, G. 2006.<\/strong> Sustainable Management of Insect Herbivores in Grassland Ecosystems: New Perspectives in Grasshopper Control. BioScience. 56(9): 743-755. Available <a href=\"https:\/\/academic.oup.com\/bioscience\/article\/56\/9\/743\/262934\">https:\/\/academic.oup.com\/bioscience\/article\/56\/9\/743\/262934<\/a><\/p>\n<p><strong>Onsager, J. 2000.<\/strong> Suppression of grasshoppers in the Great Plains through grazing management. Journal of Range Management. 53(6): 592-602. Available <a href=\"https:\/\/repository.arizona.edu\/bitstream\/handle\/10150\/643812\/9562-9443-1-PB.pdf?sequence=1&amp;isAllowed=y\">https:\/\/repository.arizona.edu\/bitstream\/handle\/10150\/643812\/9562-9443-1-PB.pdf?sequence=1&amp;isAllowed=y<\/a><\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"featured_media":26105,"parent":0,"menu_order":0,"template":"","format":"standard","meta":{"_acf_changed":false,"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":""},"ipm_pest_categories":[110],"integrated_pest_management_":[],"pest":[],"class_list":["post-24289","ipm-pests","type-ipm-pests","status-publish","format-standard","has-post-thumbnail","hentry","ipm_pest_categories-agricultural-insects"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Grasshoppers in gardens and small acreage - Agricultural Biology<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/agsci.colostate.edu\/agbio\/ipm-pests\/grasshopper\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Grasshoppers in gardens and small acreage - Agricultural Biology\" \/>\n<meta property=\"og:description\" content=\"Grasshoppers in Gardens and Small Acreage Order: OrthopteraFamily: Acrididae Grasshoppers\u00a0are closely related to crickets and katydids. Over 100 species of grasshoppers occur in Colorado and their populations fluctuate from year to\u00a0year. They\u00a0may cause serious damage to yards and fields during outbreaks.\u00a0The table below shows primary grasshopper species found in Colorado.\u00a0\u00a0 Grasshoppers are difficult pests to [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/agsci.colostate.edu\/agbio\/ipm-pests\/grasshopper\/\" \/>\n<meta property=\"og:site_name\" content=\"Agricultural Biology\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/CSUAgSci\/\" \/>\n<meta property=\"article:modified_time\" content=\"2025-05-01T15:52:35+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/agsci.colostate.edu\/agbio\/wp-content\/uploads\/sites\/127\/2022\/03\/differential-grasshopper.jpeg\" \/>\n\t<meta property=\"og:image:width\" content=\"1080\" \/>\n\t<meta property=\"og:image:height\" content=\"700\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@CSUAgSci\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/agsci.colostate.edu\\\/agbio\\\/ipm-pests\\\/grasshopper\\\/\",\"url\":\"https:\\\/\\\/agsci.colostate.edu\\\/agbio\\\/ipm-pests\\\/grasshopper\\\/\",\"name\":\"Grasshoppers in gardens and small acreage - Agricultural Biology\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/agsci.colostate.edu\\\/agbio\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/agsci.colostate.edu\\\/agbio\\\/ipm-pests\\\/grasshopper\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/agsci.colostate.edu\\\/agbio\\\/ipm-pests\\\/grasshopper\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/agsci.colostate.edu\\\/agbio\\\/wp-content\\\/uploads\\\/sites\\\/127\\\/2022\\\/03\\\/differential-grasshopper.jpeg\",\"datePublished\":\"2022-03-05T02:37:39+00:00\",\"dateModified\":\"2025-05-01T15:52:35+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/agsci.colostate.edu\\\/agbio\\\/ipm-pests\\\/grasshopper\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/agsci.colostate.edu\\\/agbio\\\/ipm-pests\\\/grasshopper\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/agsci.colostate.edu\\\/agbio\\\/ipm-pests\\\/grasshopper\\\/#primaryimage\",\"url\":\"https:\\\/\\\/agsci.colostate.edu\\\/agbio\\\/wp-content\\\/uploads\\\/sites\\\/127\\\/2022\\\/03\\\/differential-grasshopper.jpeg\",\"contentUrl\":\"https:\\\/\\\/agsci.colostate.edu\\\/agbio\\\/wp-content\\\/uploads\\\/sites\\\/127\\\/2022\\\/03\\\/differential-grasshopper.jpeg\",\"width\":1080,\"height\":700,\"caption\":\"Differential grasshopper. 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