“One spray and three defenses†is an important technical measure for the management of late-stage growth and development of wheat. It refers to the spraying of plant growth regulators, foliar fertilizers, fungicides, insecticides, etc. , Through a single application to achieve the purpose of preventing dry hot air, preventing pests and diseases, and preventing premature senility, the effect of increasing grain weight gain is ensured to ensure the increase of yield and yield of wheat.
First, the principle of "one spray and three defenses" technology
(a) Efficient use of root protection leaves. Potassium dihydrogen phosphate and other foliar fertilizers are sprayed directly outside the roots, the plants absorb quickly, the loss of nutrients is small, the utilization rate of fertilizer is high, and the effect of healthy plants is good. Can quickly and efficiently play the role of root protection leaves.
(B) improve the conditions, resistance to anti-failure. Spraying “one jet and three defenses†mixed liquids can increase air humidity among wheat field strains, improve microclimate in the field, increase plant tissue moisture content, reduce leaf transpiration intensity, increase plant water-holding capacity, can resist the damage of dry hot wind, and prevent late plant greening. Withered premature aging.
(c) Anti-disease and pest control to mitigate harm. Foliar spray fungicide can produce inhibitory or resistant substances, prevent the invasion of rust, powdery mildew, sheath blight, head blight and other pathogenic bacteria, inhibit the spread of disease development, and reduce the losses caused by the above-mentioned various diseases. Foliar spraying pesticides, pesticides quickly into the plant body, can be sucked by sucking insects such as aphids, midge insects or juice in the grains, poisoning pests, some pesticides at the same time have contact with the insects and fumigation, through the spray Directly kill pests, thereby reducing the population density or completely eliminate pests, in order to prevent or reduce the damage caused by pests on wheat production.
(D) extend the grouting, increase grain weight. Spraying plant growth regulators can delay root senescence, promote root activity, and maintain the root absorption function of wheat during grain filling. Reduce the evaporation of leaf moisture, avoid dry heat caused by a large number of plant water loss and the formation of blue and green premature aging. Promote the increase of chlorophyll content in wheat leaves, extend the functional period of leaves, delay plant senescence, promote strong photosynthesis of leaves, increase carbohydrate accumulation and transformation, promote grain filling, increase grain weight, and increase yield.
Second, "one spray three defense" technical points
(I) Prevention and treatment of diseases in the middle and late stages of wheat growth. "One spray and three defenses" spraying period is during the period from heading wheat to flowering. Diseases during this period mainly included powdery mildew, rust, sheath blight, and head blight. The main pesticides for controlling wheat rust and powdery mildew are triadimefon, diniconazole, tebuconazole, epoxiconazole, oxazol, myclobutanil, propiconazole, and the like. The agents for controlling scabs mainly include cyanocastrobin, carbendazim, tebuconazole, prochloraz, carbendazim, polyketone (carbendazim and triadimefon etc.) Prevention. The first spraying of wheat from the earliest stage of wheat to the early stage of flowering (10% of Yanghua), if it encounters continuous rainy weather, it will be used for the second time after the first spraying for 5~7 days; the main pesticide for controlling sheath blight is triazole. Ketone, diniconazole, epoxiconazole, Jinggangmycin and the like. When the diseased rate in the field reached 10%, the watering was evenly sprayed in the middle and lower parts of the plant, and the serious diseased field was re-administered for 7 to 10 days.
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