Updated February 23, 2006 by Keith Jarvi
| Economic Thresholds:
Pea Aphids: 50 aphids/stem on ten inch tall alfalfa, 100/stem on 20 inch tall alfalfa. Blue alfalfa aphid: 20 aphids/stem on ten inch tall alfalfa, 50/stem on 20 inch tall alfalfa. Spotted alfalfa aphid: 1-3 aphids per seedling, 50 aphids/stem on 10 inch tall alfalfa, 100 aphids/stem on 20 inch tall alfalfa. |
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: | ||||
PHI = pre-harvest interval | ||||
Mode of Action |
Product Name |
Common Name |
Rate (Formulation/Acre) |
Restrictions/Comments |
|---|---|---|---|---|
| |
||||
| 3 R | Ambush 2E, 25W or 25 W WP |
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 | Arctic 3.2EC | permethrin | 2 - 8 oz | At 4 oz or less, no preharvest interval. Over 4 oz, preharvest interval of 14 days. |
| 3 R | Baythroid XL | cyfluthrin | 1.6 - 2.8 oz | For pea aphid and blue alfalfa aphid. Preharvest interval of 7 days. Suppression of cowpea aphids. |
| 1B | Cythion 5 | malathion | 1 - 2 pts | Rate for pea aphid at 1 pt; for spotted alfalfa aphid at 1.5-2.0 pts. No preharvest interval. |
| 1B | Cythion 8 | malathion | 1.25 - 1.5 pts | No preharvest interval. |
| 1B | Dimethoate 4E | dimethoate | 0.5 -1 pt | Preharvest interval of 10 days. |
| 1B | Dimethoate 5 lb | dimethoate | 6.4 - 12.8 oz | Preharvest interval of 10 days. |
| 1B R | Imidan 70-WSB + Dimethoate 4E |
phosmet + dimethoate | 1.3 lbs + 0.25 - 0.5 pt |
Preharvest interval of 10 days. |
| 1A R | Lannate LV | methomyl | 1.5 - 3 pts | No preharvest interval. For grazing or feed, wait 7 days. |
| 1A R | Lannate SP | methomyl | 1 lb | No preharvest interval. For grazing or feed, wait 7 days. |
| 1B R | Lorsban 4E | chlorpyrifos | 1 - 2 pts | For pea aphid and blue alfalfa aphid. At 1 pt, preharvest interval of 14 days. Over 1 pt, preharvest interval of 21 days. |
| 1B | Malathion 57EC | malathion | 1.5 - 2.25 pts | For pea aphid and spotted alfalfa aphid. No preharvest interval. |
| 3 R | Mustang Max | zeta-cypermethrin | 2.24 - 4.0 oz | PHI 3 days cutting or grazing and 7 days harvesting seed. Aphid control may be variable depending on species and plant relationships. |
| 1B R | Penncap-M | methyl parathion | 1.5 - 3 pts | Rate for pea aphid at 2 - 3 pts; for blue alfalfa aphid at 1.5-2.0 pts. Preharvest interval of 15 days. |
| 3 R | Permethrin 3.2EC | permethrin | 2 - 8 oz | At 4 oz or less, no preharvest interval. Over 4 oz, preharvest interval of 14 days. |
| 3 R | Pounce 3.2E | permethrin | 2 - 8 oz | For pea aphid, blue alfalfa aphid and green peach aphid. At 4 oz or less, no preharvest interval. Over 4 oz, preharvest interval of 14 days. |
| 3 R | Pounce 25WP | permethrin | 3.2 - 12.8 oz | For pea aphid, blue alfalfa aphid and green peach aphid. At 6.4 oz or less, no preharvest interval. Over 6.4 oz, preharvest interval of 14 days. |
| 3 R | Pounce WSB | permethrin | 0.05 - 0.2 lb | For pea aphid, blue alfalfa aphid and green peach aphid. At 0.1 lb or less, no preharvest interval. Over 0.1 lb, preharvest interval of 14 days. |
| 3 R | Proaxis | gamma-cyhalothrin | 2.56 - 3.84 oz | PHI - 1day forage, 7 days hay. |
| 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 1 day for forage, 7 days for hay. |
