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Department of Entomology

Insecticide Treatment Options for Potato Leafhoppers in Alfalfa

Insecticides for Control of Potato Leafhopper in Alfalfa

Updated March 17, 2006 by Keith Jarvi


Economic Threshold

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.

For more information about the biology and management of the potato leafhopper:
consult NebGuide G93-1136-A, Potato Leafhopper Management in Alfalfa.



IRAC Mode of Action Classification:
  • Group 1 = Acetylcholine esterase inhibitors; 1A = Carbamates; 1B = Organophosphates
  • Group 3 = Sodium channel modulators
R = Restricted-Use Product
PHI = pre-harvest interval

Mode of
Action
Product
Name
Common
Name
Rate
(Formulation/Acre)
Restrictions/Comments

3 R

Ambush 2 E or
Ambush 25 W or
Ambush 25W WP

permethrin 3.2 - 12.8 oz 6.4 oz or less, no preharvest interval (PHI). Over 6.4 oz - 14 day PHI.
3 R Arctic 3.2EC permethrin 4 - 8 oz 4 oz or less, no PHI.
Over 4 oz, 14 day PHI.
3 R Baythroid XL cyfluthrin 0.8 - 1.6 oz 7 day PHI.
1B R Chlorpyrifos 4E chlorpyrifos 1 - 2 pts At 1 pt, no grazing or harvest for 14 days. Above 1 pt, no grazing or harvest for 21 days.
1B Cythion 5 malathion 1.5 - 2 pts 0 PHI.
1B Cythion 8 malathion 1.25 - 1.5 pts 0 PHI.
1B R Declare methyl parathion 1 - 2 pts 15 day PHI.
1B R Imidan 70-WSB phosmet 1.3 lbs 7 day PHI.
1B R Lorsban 4E chlorpyrifos 0.5 - 1 pt 0.5 pt, 7 day PHI.
1 pt, 14 day PHI.
1B Malathion 57EC malathion 1.5 - 2.25 pts 0 PHI.
3 R Mustang Max zeta-cypermethrin 2.24 - 4.0 oz PHI 3 days cutting or grazing and
7 day PHI seed.
1B R Nufos 4E chlorpyrifos 1 - 2 pts Preharvest interval 7 days after ½ pt, 14 days after 1 pt.
1B R Penncap-M methyl parathion 2 - 3 pts 15 day PHI.
3 R Permethrin 3.2EC permethrin 4 - 8 oz At 4 oz or less, no preharvest interval. Over 4 oz, preharvest interval of 14 days.
3 R Pounce 3.2EC permethrin 4 - 8 oz 4 oz - 0 PHI.
Over 4 oz - 14 day PHI.
3 R Pounce 25 WP permethrin 6.4 - 12.8 oz 6.4 oz - 0 PHI.
Over 6.4 oz - 14 day PHI.
3 R Pounce WSB permethrin 0.1 - 0.2 lb 0.1 lb - 0 PHI.
Over 0.1 lb - 14 day PHI.
3 R Proaxis gamma-cyhalothrin 1.92 - 3.20 oz PHI - 1 day forage, 7 days hay.
1A Sevin 4F carbaryl 1 qt 7 day PHI.
1A Sevin 80S carbaryl 1.25 lbs 7 day PHI.
1A Sevin XLR Plus carbaryl 1 qt 7 day PHI.
3 R Silencer lambda-
cyhalothrin
1.92 - 3.20 oz Preharvest interval of 1 day for forage,
7 days for hay.
3 R Taiga Z lambda-
cyhalothrin
1.92 - 3.20 oz Preharvest interval of 1 day for forage,
7 days for hay.
3 R Warrior lambda-
cyhalothrin
1.92 - 3.20 oz 7 day PHI.