The scientific name, distribution, host and morphological characteristics can be found in the corn field bollworm. The larvae damage the wheat. The leaves of the larvae become nicks or holes, which break down or break the ears. (Figure left)
Prevention and control methods (1) Prevention and control index China's worm-damaging wheat-producing areas are four generations old, and five generations of irregularities may occur in individual years. One generation is mainly responsible for wheat, and the egg is at the mid-May level in mid-May. The control index for wheat is 8 larvae for 2nd instars or 100 eggs for 100 eggs per m2; the second generation eggs are in the middle and late June, and the control index is One hundred eggs per 100 eggs or more than 10 residual insects after control; 10 eggs in the third generation in the middle and late July, the control index was 100 eggs per 100 cumulative eggs or more than 5 hundred residue after treatment; Egg generation
During the period from late August to early September, the control index was more than 10 larvae or more than 5 larvae after prevention. (2) Control methods See cotton bollworm in corn fields.
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