In recent years, the condition of corn rough dwarf disease has been on the rise, and the core of prevention of corn rough dwarf disease is to control the source of poison, reduce the source of insects, and avoid hazards. Because last winter was warm and dry, and there was little rain in spring, favorable weather conditions were created for the serious occurrence of the disease, even if its prevention was not satisfactory. The main reasons are as follows: First, the spraying of pesticides is delayed, generally in the 7-8 leaf stage of corn. At this time, Laodelphax striatellus has transmitted the virus to corn, and its control effect will naturally be unsatisfactory. Second, even if the prevention and control of the time is relatively timely, but often overlook the side of the road to the land of ash fly habitat, to prevent spraying after the re-migration into the corn field continue to harm. Thirdly, the type of pesticide sprayed to prevent corn rough dwarf is the key to control the effect. Through trials and comparisons, pesticides with virus registration type, such as virus g and virus A, with pesticide registration type are selected, whose effects are higher than those for registration of agricultural fertilizers, such as crude shrinkage drug, coarse contraction net, and the effect is 40% higher. about. Fourth, the spraying of pesticides should be selected within the absorption type such as imidacloprid, acetamiprid, etc., the effect is significantly higher than stomach poisoning, fumigated pyrethroids. Fifth, corn seedlings were sprayed with virus inhibitors such as mycotoxin and virus A, and the diseased plants were found to be deeply buried and sprayed with gibberellin or overdose and zinc fertilizers to promote rapid growth of corn, thereby reducing corn consumption. Dwarf disease infected species, thereby increasing production.
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Prevention of corn rough dwarfing into the wrong zone
Maize rough dwarf disease is a corn virus disease caused by corn roughage virus, commonly known as "slope". It is mainly transmitted by the persistence of virus-borne Laodelphax striatellus. Maize rough dwarf disease is an important disease in corn seedlings. The performance symptoms are: short, stiff, broad-leaved leaves, dark green leaves, and short internodes; the top leaves are clustered like “Cliviaâ€; the waxy white sticks on the leaf veins of the leaf sheaths and temporal lobes have uneven thicknesses. , There is a clear sense of roughness. Plants are severely dwarfed and their ears are malformed. When the disease is severe, they can cause a 10% to 40% reduction in yield.