Wireworms of Flowering bulbs

Disease Information


Symptoms and damage

Wireworms are long, smooth, segmented larvae yellowish brown in color and up to 3/4 inch long; they develop from eggs laid in the soil by brown or black beetles known as click beetles. The larvae live entirely in the soil; they burrow into bulbs, hollowing out stems as they work their way up and causing the plant eventually to fall over. Principal targets are dahlias, gladioluses and tuberous begonias.


Spray or dust the soil with diazinon or chlordane and work it into the top 6 or 8 inches of earth before planting. Set the bulbs in place, spray or dust them as well; then cover them with soil. Spray growing plants with malathion.


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