Lettuce seed-Aphid


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 per season. Apply when aphids first appear, before populations build to damaging levels. 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-000017 (expires 12/31/20). Washington only. In Washington, when crops or broadleaf weeds are blooming, apply between late evening and early morning only (between 6PM and 7AM).