Updated March 3, 2006 by Keith Jarvi
Economic Threshold:
| Grasshopper Population (Hoppers/Square Yard) |
Field | Field Margin |
Treatment necessary? |
|---|---|---|---|
| Non-economic | 0-2 | 5-10 | No |
| Light | 3-7 | 11-20 | Questionable, depends on size, species, type of crop |
| Moderate | 8-14 | 20-40 | Probably |
| Abundant | 15 or more | 41 or more | Yes |
For more information, see NebFact 328, A Guide to Grasshopper Control in Cropland
This list is not inclusive. See http://www.greenbook.net
or other resources for additional registrations.
This information is presented in abbreviated form. Be sure to consult the
label for additional information and restrictions.
| IRAC Mode of Action Classification: | ||||
| ||||
Mode of Action |
Product Name |
Common Name |
Rate (Formulation/Acre) |
Restrictions/Comments |
|---|---|---|---|---|
| |
||||
| 3 R | Ambush 2E, 25W, 25WP | permethrin | 3.2 - 12.8 oz | At 6.4 oz or less, no preharvest interval. Over 6.4 oz, preharvest interval of 14 days. |
| 3 R | Baythroid XL | cyfluthrin | 2.0 - 2.8 oz | Preharvest interval of 7 days. |
| 1A | Carbaryl 4L | carbaryl | ½ - 1½ qts | Preharvest interval of 7 days. |
| 1B | Chlorpyrifos 4E | chlorpyrifos | 1 - 2 pts | At 1.0 pt, no grazing or harvest for 14 days. Above 1.0 pt, no grazing or harvest for 21 days. |
| 1B | Dimate 4EC Dimethoate 2.67EC, 400, 4EC |
dimethoate | Depends on formulation | Preharvest interval of 10 days. |
| 1B R | Lorsban 4E | chlorpyrifos | ½ - 1 pt | Preharvest interval of 7 days after ½ pint, 14 days after 1 pint. |
| 1B | Malathion 5, 55, 57EC 8 aquamul, 8 EC ULV Atrapa ULV, Fyfanon ULV |
malathion | depends on formulation | Preharvest interval depends on formulation. Zero days for many. See label. |
| 1B R | Methyl 4EC | methyl parathion | 1 pt | Preharvest interval of 15 days. |
| 3 R | Mustang Max | zeta-cypermethrin | 2.8 - 4.0 oz | Preharvest interval of 3 days. 7 days for seed. |
| 1B R | Nufos 4E | chlorpyrifos | ½ - 1 pt | Preharvest interval 7 days after ½ pt, 14 days after 1 pt. |
| 3 R | Proaxis | gamma-cyhalothrin | 2.56 - 3.84 oz | PHI - 1day forage, 7 days hay. |
| 1A | Sevin 80 WSP | carbaryl | 2/3 - 1 7/8 lbs | Preharvest interval of 7 days. |
| 3 R | Silencer | lambda- cyhalothrin |
2.56 - 3.84 oz | Preharvest interval of 1 day for forage, 7 days for hay. |
| 3 R | Taiga Z | lambda- cyhalothrin |
2.56 - 3.84 oz | Preharvest interval of 1 day for forage, 7 days for hay. |
| 3 R | Warrior | lambda-cyhalothrin | 2.56 - 3.84 oz | Preharvest interval of 7 days for hay, 1 day for forage. |
