Updated February 14, 2013
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 more information, see 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 oz |
PHI 21 days. Lower rates may be used for smaller grasshoppers. Higher rates may be necessary to control large populations, or mature grasshoppers. |
| 3 R | Baythroid XL, |
cyfluthrin | 2.1-2.8 fl oz | PHI 21 days for grain or fodder and 0 days for green forage. |
| 3 R | Brigade 2EC, |
bifenthrin |
2.1-6.4 fl oz |
PHI 30 days. Do not graze livestock in treated area or cut treated crops for feed within 30 days of treatment. |
| 1B, 3 R | Cobalt | chlorpyrifos and |
7-13 fl oz | PHI 21 days for grain. Do not allow meat or dairy animals to graze in treated areas nor harvest treated corn silage as feed for meat or dairy animals within 14 days after last treatment. |
| 3 R | Delta Gold | deltamethrin | 1.0-1.5 fl oz | PHI 21 days for grain or fodder. PHI 12 days for cutting or grazing for forage. |
| 1B | Dimethoate 4EC |
dimethoate |
1 pt |
PHI 28 days for grain and 14 days for forage. |
| 3 R | Hero | zeta-cypermethrin |
2.6-6.1 fl oz | PHI 30 days for grain or stover and 60 days for forage. Do not graze livestock in treated areas or cut treated crops for feed within 30 days of the last application. |
| 1B R | Lorsban 4E, |
chlorpyrifos |
½-1 pt |
PHI 21 days. |
| 3 R | Mustang Maxx, |
zeta-cypermethrin |
2.72-4.0 fl oz |
PHI 30 days for grain and stover. PHI 60 days for forage. |
| 1B R | Penncap-M |
methyl parathion |
2-3 pts |
PHI 12 days for harvest, forage and grazing. |
| 3 R | Proaxis | gamma- |
2.56-3.84 fl oz | PHI 21 days. |
| 1B, 3 R | Stallion | chlorpyrifos and |
9.25-11.75 fl oz | PHI 30 days for grain or stover and 60 days for forage. |
| 3 R | Steed | zeta-cypermethrin |
3.5-4.7 fl oz | PHI 30 days for grain or stover and 60 days for forage. Do not graze livestock in treated areas or cut treated crops for feed within 30 days of the last application. |
| 1B, 3 R | Tundra Supreme | chlorpyrifos |
5.6-16.8 fl oz | PHI 30 days for grain and silage. |
| 3 R | Warrior w/ |
lambda-cyhalothrin | 2.56-3.84 fl oz | PHI 21 days for harvest, grazing or cutting treated crops for feed. |
| 3 R | Warrior II w/ |
lambda-cyhalothrin | 1.28-1.92 fl oz | PHI 21 days for harvest, grazing or cutting treated crops for feed. |
