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Acalymma vittata
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Acalymma vittata (Fabricius, 1775) - (striped cucumber beetle)
This beetle is found in North and Central America. It is a serious pest of melon and other cucurbits. The adults feed on seedlings, flowers and fruits, while the larvae are root feeders. Yield losses may reach 50%. It also transmits the bacterial wilt of cucurbits (Erwinia tracheiphila).
In spring adult beetles emerge from diapause, sometimes in large numbers and start feeding. If initially, cucurbits are not available, they might also feed on other plants like apple or willow. After mating, females deposit eggs in the soil at the base of cucurbit plants. Larval development is completed after about one month and there may be a second generation under suitable environmental conditions. The adult is around 5-5½ mm long. The elytra are yellow with 3 black stripes.
| Vernacular names | |
|---|---|
| • English: | striped cucumber beetle |
| • Français: | chrysomèle rayée du concombre |
- Other images of Acalymma vittata (Wikimedia Commons and IPM Images - click to enlarge)
life cycle
adults on squash leaf
adult feeding damage on melon skin
larva in melon rind
extensive larval damage on melon stem causing plant collaps
