Wheat armyworm, scientific name Mythimna separata (Walker) lepidoptera, cutworm, unlike Leucania separata Walker alias millet burglary bug, shave branch worm, trivial name colorful bug, wheat silkworm, etc.
Host plant: wheat, rice, millet, corn, etc cereal food crops and cotton, beans, vegetables 16 families, 104 kinds of above plants.
Harm characteristics: armyworm except for the sake of wheat, rice outside, in field crop field main harm maize, sorghum, millet and so on the many kinds of gramineous crop and weed. If not timely prevention and control, only 2 ~ 3 days are likely to wheat or corn, sorghum, millet seedling blade dispose of, only vein, cause serious loss.
Wheat armyworm is a kind of moving fly sex insects, winter in southern guangdong, guangxi, fujian and other coastal areas winter, spring, summer, autumn in our country of the middle and lower Yangtze river, the huang-huai-hai, north China, northeast China and other major wheat migration harm.
Life habits of the insect like half dry blade smell of eggs on maize, millet and the central point of blade, incubation 3 age before the larva is centered on the leaf feeding.
Recommend of prevention and cure: when the plants have larva 10 head or every square metre has larva 5 head, every 667 m2 with 10 billion spore/ml short stability bacillus suspending agent 80 ~ 100 ml water against 45 kg or so uniform spray mist. |
