Pest description and crop damage Nymphs stunt plant growth and are recognized easily by spittle mass. An average of one nymph or more per stem may damage alfalfa, clover, and many other crops.
- chlorpyrifos (Lorsban Advanced) at 1.0 lb ai/a. This product is highly toxic to bees. Do not apply when any clover bloom is present. Do not make more than one application per crop year. REI 24 hr. Do not graze clover after application. Do not cut treated clover for hay or forage. Do not use harvested seed for sprouting. No part of the treated field, including seed, seed screenings, hay, forage, or stubble, may be used for human or animal feed. Processed seed must be labeled. 24c SLN: OR-090010 (expires 12/31/2023). Oregon only.
- malathion at 1 to 1.25 lb ai/a. Apply to plants in bloom only in evening or early morning, when bees are not working in the fields or hanging on the outside of the hives.