Updated December 21, 2011
Table of Economic Thresholds:
| 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 information on the biology and management of grasshoppers, refer to
NebGuide G86-791-A,
A Guide to Grasshopper
Control in Cropland, and 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 | Asana XL | esfenvalerate | 5.8 - 9.6 fl oz | PHI 21 days. Do not exceed 0.2 lb ai. per acre per season. Do not feed or graze livestock on treated plants. |
| 3 R | Baythroid XL | cyfluthrin | 2.0 - 2.8 fl oz | PHI 21 days for seed. Dry vines and green foliage may be fed 15 days after last application. |
| 3 R | Brigade 2EC | bifenthrin | 2.1-6.4 fl oz | Do not apply within 18 days of harvest. |
| 1B, 3 R | Cobalt | chlorpyriphos + cyhalothrin | 7 - 13 fl oz | PHI 30 days. Maximum allowed per crop season 85 fl oz. Do not allow meat or dairy animals to graze in treated areas or feed treated forage, hay, and straw to meat or dairy animals. |
| 3 R | Delta Gold 1.5 EC | deltamethrin | 1.5 - 2.4 fl oz | PHI 21 days. Maximum allowed per crop season 8.5 fl oz. Do not allow livestock to graze treated forage, or feed treated hay to livestock. |
| 1B | Dimethoate 400 | dimethoate | 1 pt | PHI 21 days. 7-day reapplication interval. |
| 15 R | Dimilin 25W, 2L | diflubenzuron | 2 fl oz | PHI 21 days. No more than 2 applications per season. Treat when majority of grasshoppers have reached 2nd - 3rd instar. |
| 3, 4A R | Endigo ZC | lambda-cyhalothrin thiamethoxam |
4.0 - 4.5 fl oz | PHI 30 days. Do not exceed a total of 9.0 fl oz per acre per growing season. |
| 3 R | Hero | zeta-cypremethrin + bifenthrin | 2.6 - 6.1 oz | PHI 21 days. Do not make applications less than 30 days apart. Do not graze or harvest treated soybean forage, straw, or hay for livestock. |
| 3, 4A R | Leverage 360 | imidacloprid + cyfluthrin | 2.8 fl oz | PHI 21 days for seed and 15 days for dry vines (hay) and green forage. Minimum of 7 day interval between applications. Maximum of 9.0 fl oz/acre per crop season. |
| 1B R | Lorsban Advanced | chlorpyrifos | 1 - 2 pts | PHI 28 days. Do not apply more than 3 applications of Lorsban or other product containing chlorpyrifos per year. Limit 6 pints per acre per season. Do not apply last two treatments closer than 14 days apart. Do not allow livestock to graze in treated areas or otherwise feed treated foliage, hay, and straw to meat or dairy animals. |
| 3 R | Mustang MAX EC | zeta-cypermethrin | 3.2 - 4.0 fl oz | PHI 21 days. Do not graze or harvest treated soybean forage, straw, or hay for livestock feed. Use higher recommended dosage for increased pest pressure, increased residual pest control or later-season applications. |
| 1B R | Penncap-M | methyl parathion | 2 - 3 pts | Do not make more than 2 applications per season. Do not use within 30 days of harvest or grazing. |
| 3 R | Proaxis | gamma-cyhalothrin | 3.2 - 3.84 fl oz | Do not apply within 45 days of harvest or more than 0.48 pints per acre per season. |
| 3 R | Warrior w/ Zeon Technology, Silencer |
lambda- cyhalothrin |
3.2 - 3.84 fl oz | PHI 30 days. Do not graze or harvest treated soybean forage, straw or hay for livestock feed. |
| 3 R | Warrior II w/ Zeon Technology |
lambda- cyhalothrin |
1.60 - 1.92 fl oz | PHI 30 days. Do not graze or harvest treated soybean forage, straw or hay for livestock feed. |
