Root Weevil or Fireworm larvae feed on raspberry or strawberry roots in May, causing wilting and collapse of strawberry plants just prior to and during fruiting and decline in vigor of raspberry plants. Root weevils are the most damaging.
Root weevil larvae can be found in soil surrounding a single plant. They are C-shaped and have no legs, in contrast to grub larva causing similar damage.
Root weevil adults are usually seen in August.
Fireworms feed on roots of many plants, but generally do not kill them.
More information:
- Weevils Commonly Found in Raspberry Fields – (Washington State University)
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