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[Wheat | Barley | Canola | Sunflowers | Soybeans | Grasshoppers | IPM Home]
Grasshoppers
2002 Crop Survey | Past Year Crop Surveys | 2002 USDA Rangeland Survey | Publications | Thresholds | Comments
Grasshopper counts reported by the survey are based on sweep net samples taken along field margins or in non-crop areas bordering fields. Survey scouts have been instructed to sample all crop sites visited, regardless of crop, since grasshoppers are a general plant feeder and could affect any of our North Dakota crops.
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| 2002 Crop Survey | 2001 Crop Survey |
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| 2000 Crop Survey |
1999 Crop Survey |
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Publications
Grasshopper Biology and Management for North Dakota
Grasshopper
Information
Thresholds
Infestation Ratings
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Nymphs |
Adults
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| Rating | Margin | Field | Margin | Field |
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Light
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25-35
50-75 100-150 200+ |
15-23
30-45 60-90 120 |
10-20
21-40 41-80 80+ |
3-7
8-14 15-28 28+ |
In general, grasshopper populations classified as threatening are expected to cause crop damage and warrant treatment.
For more information, please contact:
Marcia McMullen, Plant
Pathologist, IPM Coordinator
mmcmulle@ndsuext.nodak.edu
Phil Glogoza, Entomologist
pglogoza@ndsuext.nodak.edu
Webmaster: Web_Master@ndsu.nodak.edu
This site was last updated August 19, 2002