Lettuce-Aphid

Includes

Green peach aphid (Myzus persicae)
Lettuce aphid (Nasonovia ribisnigri)
Potato aphid (Macrosyphum euphorbiae)

Pest description, crop damage and life history

See:

Management-cultural control

Aphid populations tend to be higher in plants that are fertilized liberally with nitrogen.

Home gardeners can use row covers or wash aphids from plants with a strong stream of water.

Management-chemical control: HOME USE

  • acetamiprid
  • azadiractin (neem oil)-Some formulations are OMRI-listed for organic use.
  • Beauvaria bassiana-OMRI-listed for organic use.
  • bifenthrin
  • carbaryl
  • cyfluthrin
  • cyhalothrin
  • gamma-cyhalothrin
  • imidacloprid
  • insecticidal soap-Some formulations are OMRI-listed for organic use.
  • kaolin-When applied as a spray to foliage and stems it acts as a repellent to some insect pests. Some formulations are OMRI-listed for organic use.
  • lambda-cyhalothrin
  • malathion
  • permethrin
  • plant-derived essential oils (rosemary, peppermint etc.)-These have some efficacy against aphids. Some formulations are OMRI-listed for organic use.
  • pyrethrins-Some formulations are OMRI-listed for organic use.
  • spinosad-Some formulations are OMRI-listed for organic use.
  • zeta-cypermethrin

Management-chemical control: COMMERCIAL USE

  • acephate (Acephate 90WDG) at 0.5 to 1 lb ai/a. PHI 21 days. REI 24 hr. Head lettuce only. Retreatment interval 7 days. Limit 5 treatments per year. Do not exceed 2 lb ai per season. Do not graze or feed treated plants.
  • acetamiprid (Assail 30SG) at 0.038 to 0.075 lb ai/a. REI 12 hr. PHI 7 days. Do not exceed 0.375 lb ai/a per season. Retreatment interval 7 days. Limit 5 treatments per season.
  • alpha-cypermethrin (Fastac EC) at 0.014 to 0.025 lb ai/a. PHI 1 day. REI 12 hr. Retreatment interval 7 days. Do not exceed 0.075 lb ai/a per season.
  • Beauveria bassiana (Mycotrol ESO) at 0.25 to 1 quart/a. PHI 0 days. REI 4 hr. OMRI-listed for organic use.
  • beta-cyfluthrin/imidacloprid (Leverage 360) at 0.07 lb ai/a. PHI 7 days. REI 12 hr. Retreatment interval 7 days. Do not exceed 0.1 lb ai/a beta-cyfluthrin or 0.2 lb ai/a imidacloprid per season.
  • bifenthrin (Brigade 2EC) at 0.033 to 0.1 lb ai/a. PHI 7 days. REI 12 hr. Head lettuce only. Do not exceed 0.5 lb ai/a per season. Retreatment interval 7 days.
  • bifenthrin + avermectin (Athena) at 0.048 to 0.116 lb ai/a. PHI 7 days. REI 12 hr. Retreatment interval 7 days. Head lettuce only. Do not exceed 0.056 lb ai/a avermectin nor 0.5 lb ai/a bifenthrin per season.
  • bifenthrin/imidacloprid (Brigadier) at 0.06 to 0.095 lb ai/a. PHI 7 days. REI 12 hr. Do not exceed 0.24 lb ai/a imidacloprid and 0.5 lb ai/a bifenthrin. Retreatment interval 7 days.
  • bifenthrin + zeta-cypermethrin (Hero) at 0.04 to 0.1 lb ai/a. PHI 7 days. REI 12 hr. Retreatment interval 7 days. Do not exceed 0.45 lb ai/a per season. Head lettuce only.
  • borate complex (Prev-Am Ultra) apply as 0.8% solution. Spray to complete coverage. REI 12 hr. OMRI-listed for organic use.
  • Chenopodium ambrosioides extract (Requiem 25EC) at 4 to 6 pints formulated product per acre. REI 4 hr. Use high rate when conditions are favorable for heavy pressure. OMRI-listed for organic use.
  • chlorantraniliprole/thiamethoxam (Voliam Flexi) at 0.1 to 0.172 lb ai/a. PHI 7 days. REI 12 hr. Minimum of 7 days between applications. Do not exceed 0.172 lb ai of thiamethoxam or 0.2 lb ai of chlorantraniliprole per acre per growing season.
  • Chromobacterium subtsugae (Grandevo) at 0.6 to 0.9 lb ai/a per 100 gal. PHI 0 days. REI 4 hr. OMRI-listed for organic use.
  • clothianidin (Belay) at 0.05 to 0.067 lb ai/a foliar, 0.15 to 0.2 lb ai/a soil. PHI 7 days foliar, 21 days soil. REI 12 hr. Retreatment interval 7 days. Do not exceed 0.2 lb ai/a per season.
  • cyantraniliprole (Exirel) at 0.088 to 0.133 lb ai/a. PHI 1 day. REI 12 hr. Retreatment interval 5 days. Do not exceed 0.4 lb ai/a per year.
  • cyfluthrin + imidacloprid (Leverage 2.7) at 0.08 lb ai/a. PHI 7 days. REI 12 hr. Retreatment interval 7 days. Do not exceed 0.17 lb ai/a cyfluthrin or 0.24 lb ai/a imidacloprid per year.
  • diazinon (Diazinon 50W) at 0.25 to 0.5 lb ai/a. PHI 14 days. REI 3 days. Limit one treatment per year.
  • dimethoate (Dimethoate 4E) at 0.25 lb ai/a. PHI 14 days. REI 48 hr. Retreatment interval 7 days. Do not exceed 0.5 lb ai/a per season. Leaf lettuce only.
  • dinotefuran (Scorpion 35SL) at 0.05 to 0.13 lb ai/a foliar or 0.23 to 0.27 lb ai/a soil. PHI 7 days foliar and 21 day for soil. REI 12 hr. Retreatment interval 7 days. Do not exceed 0.266 lb ai/a foliar or 0.532 lb ai/a for soil per season.
  • flonicamid (Beleaf 50SG) at 0.062 to 0.089 lb ai/a. PHI 0 days. REI 12 hr. Do not exceed 0.267 lb ai/a or three applications per season. Retreatment interval 7 days.
  • imidacloprid (Admire Pro) at 0.16 to 0.38 lb ai/a soil and 0.047 lb ai/a foliar. PHI 21 days soil; 7 days foliar. REI 12 hr. Retreatment interval 5 days. Do not exceed 0.38 lb ai/a soil or 0.23 lb ai/a foliar per season.
  • imidacloprid (Provado, Prey) at 0.0475 lb ai/a. PHI 7 days. REI 12 hr. Allow 5 days between foliar sprays. Do not use more than 0.23 lb ai/a per season.
  • insecticidal soap (M-Pede) at 1 to 2% solution. Potassium salts of fatty acids. See label for gal/a. PHI 0 days. REI 12 hr.
  • Isaria fumosorosea (PFR-97 20% WDG)-Most effective when application is initiated just before or at the first signs that target pests are present. OMRI-listed for organic use.
  • lambda-cyhalothrin + thiamethoxam (Endigo ZC) at 0.064 to 0.072 lb ai/a. PHI 7 days. REI 24 hr. Retreatment interval 7 days. Do not exceed 0.3 lb ai/a of lambda-cyhalothrin or 0.172 lb ai/a of thiamethoxam per season.
  • malathion (Fyfanon 8E) at 1.25 to 1.88 lb ai/a. PHI 14 days. REI 24 hr. Retreatment interval head lettuce 6 days, leaf lettuce 5 days. Limit 2 treatments per year.
  • methomyl (Lannate SP) at 0.45 to 0.9 lb ai/a. PHI 7 days at low rate; 10 days at high rate. REI 48 hr. Retreatment interval 2 days. Do not exceed 7.2 lb ai/a for head or 3.6 lb ai/a for leaf per season.
  • oxydemeton-methyl (MSR Spray Concentrate) at 0.5 lb ai/a. PHI 21 days. REI 3 days. Limit 3 applications per season. Retreatment interval 7 days. Head lettuce only.
  • permethrin (Loveland Permethrin) at 0.1 to 0.2 lb ai/a. PHI 1 day. REI 12 hr. Retreatment interval 7 days. Do not exceed 0.8 lb ai/a per season. Toxic to fish.
  • pymetrozine (Fulfill) at 0.086 lb ai/a. PHI 7 days. REI 12 hr. Retreatment interval 7 days. Do not exceed 0.172 lb ai/a per crop.
  • spirotetramat (Movento) at 0.06 to 0.08 lb ai/a. PHI 3 days. REI 24 hr. Retreatment interval 7 days. Do not exceed 0.16 lb ai/a per crop season.
  • thiamethoxam (Actara) at 0.024 to 0.047 lb ai/a. PHI 7 days. REI 12 hr. Retreatment interval 7 days. Do not exceed 0.172 lb ai/a per season.
  • thiamethoxam (Platinum) at 0.078 to 0.172 lb ai/a soil. PHI 30 days. REI 12 hr. Do not exceed 0.172 lb ai/a per season.
  • thiamethoxam + chlorantraniliprole (Durivo) at 0.195 to 0.257 lb ai/a soil. PHI 30 days. REI 12 hr. Do not exceed 0.257 lb ai/a per season. Limit 1 treatment per year.
  • tolenpyrad (Torac) at 0.17 to 0.21 lb ai/a. PHI 1 day. REI 12 hr. Retreatment interval 14 days. Limit 4 treatments per year. Do not exceed 0.42 lb ai/a per year.
  • zeta-cypermethrin (Mustang) at 0.028 to 0.05 lb ai/a. PHI 1 day. REI 12 hr. Retreatment interval 7 days. Do not exceed 0.3 lb ai/a per season.