Control of adult stem weevil in ryegrass seed crops with chlorpyrifos

Pests in herbage seed production

“…tent to lay eggs in the spring. This information may improve the chances of success of in-OTHER M INOR P ESTS secticides such as chlorpyrifos (0.5 kg/ha) used against the adult in spring, which gave Many insects may be present in grass seed increased seed yields (Forgie, 1974)) or in-crops, but it is probable that only very slight crease the efficiency of insecticides such as damage will normally result from their attack oxamyl (1 kg/ha) (Welsh et al, 1974) against on seed or seedheads. larvae.…”