Lettuce seed-Aphid

Includes

Green peach aphid (Myzus persicae)
Lettuce aphid (Nasonovia ribis-nigri)

Pest description and crop damage Small yellowish, soft-body insect. Aphids suck plant sap from foliage causing a yellowing or wilting of the plant and sticky "honeydew" exudates.

Management-chemical control

Begin applications at first sign of infestation. Multiple applications with thorough coverage are necessary for effective control.

  • azadirachtin (Neemix 4.5) at 5 to 7 fl oz /a (0.015 to 0.021 lb ai/a). PHI 0 days. REI 4 hr. Suppression and adult feeding deterrence. Apply every 7 to 10 days as needed. Some formulations are OMRI-listed for organic production.
  • pymetrozine (Fulfill) at 2.75 oz/a product (0.086 lb ai/a). PHI 14 days. REI 12 hr. Do not exceed 5.5 oz/a product (0.172 lb ai/a) per season. Apply when aphids first appear, before populations build to damaging levels. Affected aphids will stop feeding on the plant shortly after exposure, but may remain on the plant until they die, which is usually within 4-10 days. Use a minimum of 5 gal water/a when applied by air and a minimum of 10 gal water/a when applied by ground. Two applications may be needed to control persistent aphid populations. Allow at least 7 days between applications. Allow a minimum of 14 days (PHI) between the last application and harvest. SLN WA-190003 for Adama Fulfill products (expires 12/31/2024). Washington only. In Washington, when crops or broadleaf weeds are blooming, apply between late evening and early morning only (between 6PM and 7AM).