Since April, wheat has entered a period of equal emphasis on nutrition and reproductive growth, namely the stage of ear differentiation. After entering this period, it is the period when wheat needs fertilizer and water demand. It is also the most dangerous period of powdery mildew, sheath blight, scab and aphids, wheat spiders, and larvae. At the same time, the root activity of wheat begins to decline, that is, yellow root. Increased, white roots are reduced, roots are absorbed, and water absorption capacity is reduced. Therefore, on the basis of jointing and panicle fertilizer, it should also be in the ear differentiation stage to the booting stage, that is, in the middle of April, the wheat heading stage, that is, from the end of April to the beginning of May, the early stage of post-grouting, that is, the middle of May, the total In 3 times, we will do a good job of mixing pesticides with pesticides in the middle and late stages of wheat.
The combination of medicine and fertilizer has the following advantages:
One is to save costs. The "three doses" of fungicides, insecticides, and regulators (or foliar fertilizers) can be sprayed together to reduce the amount of medicine, and the number of spraying can be reduced, and the labor cost can be reduced. According to calculations, per acre can be The cost of saving medicine, fertilizer and labor spray is more than 20 yuan.
The second is to improve the effectiveness of prevention. Spraying the fungicide , insecticide and regulator together can increase the concentration of the fertilizer, so that the "three doses" promote each other and complement each other, improve the utilization efficiency of the fertilizer, and prevent the disease, the pest control and the yield increase. It can eliminate wheat pests and diseases, premature aging and so on in the bud.
The third is to increase production and increase efficiency. According to the practice and investigation in recent years, in the wheat in the middle and late stages of wheat, the straw is thick and strong, the flexibility is enhanced, the leaf color becomes thick, the green is thick, the ear is large and the grain is full, the grain is full, and the stalk is yellow. The occurrence of pests and diseases is light, generally increasing production by more than 15%, and increasing the benefits by more than 120 yuan.
According to the survey, the fungicides used in the three-drug blending of wheat and fertilizer mainly include: Jinggangmycin, Zengjingjing (jingjingmycin and Fusarium oxysporum compound), triadimefon, allicin, and alkene. Oxazol, myclobutanil, carbendazim, thiram, thiram and other compounding agents, the first five main use of the first, to control sheath blight, powdery mildew, rust, etc., second and third Seven kinds of after-use, mainly to control powdery mildew and scab. The main insecticides are: cypermethrin, omethoate, cyhalothrin, deltamethrin, fenvalerate, phoxim, chlorpyrifos, acephate, imidacloprid, avermectin, carbaryl salt, etc. For pollution-free pesticides such as compounding agents, it is strictly forbidden to use high-toxicity and high-residue pesticides such as methamidophos; regulators (or foliar fertilizers) mainly include: strong rooting and seedlings, rooting powder, and re-dioxide Phenol sodium, etc., to promote and improve root activity; the second available amino acids, humic acid, fulvic acid, trace elements, etc., to supplement nutrition and promote leaf photosynthesis; the third available potassium dihydrogen phosphate, cell activator , active enzymes and other regulators to promote the transport of substances and enhance the vigor of whole wheat, prevent premature aging and so on. China Pesticide Network recommends that in order to supplement the deficiency of nitrogen nutrition, about 150 grams of urea can be added for each mixed fertilizer.
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