Green Vane Trap

For monitoring Anthonomus rubi, use two or more traps in each field. They should be sited in places where adults are likely to migrate into the crop in spring. The crop margin next to the hedgerows or woodland where the adults may have overwintered in hedge bottoms is a good position, or else where adults may migrate from neighbouring crops which have flowered earlier.  For Lygus rugulipennis, place the traps at 50 m intervals around the edge of fields.

For protected crops, traps should be set at the ends of tunnels near the entrance where weevils are likely to enter from hedgerows, head- lands or adjacent infested crops.

The traps base should be partially buried in the soil to stop it from falling over. Do not bury it too deeply as this can result in larger numbers of ground beetles entering the trap unintentionally. Make sure that the top of the trap is below the boom height of a sprayer.

Collect data weekly or more frequently if possible. Weevils and bugs captured may be removed on each sampling occasion which makes counting new arrivals easier, but this is not strictly necessary. Decisions on pesticide application should not be taken solely on the trap catch data. Climatic and biological considerations should be taken in account.

Lures can be changed every 4-8 weeks to get the most accurate results.