Appropriate use of pesticides can not only save pesticides, reduce costs, but also improve control effectiveness and reduce drug residues. When judging pesticide application period, it should be considered from the following aspects: Select pest occurrence period. The period of occurrence of pests can be the period of hatching of eggs, which can be the period of larvae emergence, or the period of adult emergence. In what period is the best effect of drug control, depending on the circumstances. In principle, it is necessary to curb the living habits of pests, and to do so when they are most vulnerable to damage and can effectively control damage. For example, the control of armyworm, sprayed at the peak of egg hatching, although it has good control effect on hatched larvae, it is not necessarily effective for later hatching larvae, and when the larvae are sprayed at the peak of 2-3 larvae, a control is Can solve pest problems. In addition, if the bollworm is controlled, the newly hatched larvae will enter the bells within a short period of time. If the larvae are used again at the peak of the 2-3rd larvae, the control effect will be poor, and the egg hatches during the peak period of egg hatching. The control effect is very obvious. The same is true for rice aphids and Spodoptera litura. Select the sensitive period of natural enemies. In the period when natural enemies of pests are sensitive to drug reactions, they should use as little or no medicine as possible to protect their natural enemies and maintain their ecological balance. Choose the period of affective growth. For diseases, the growth period of susceptible diseases is the best period for drug control. If seedlings are most susceptible to bacterial blight, they can be seeded with fungicides or sprayed at the seedling stage before sowing. If the flowering period is also the peak period of disease infestation, it is important to control the use of pesticides on the road during flowering. Select weed sensitive period. Application of herbicides should normally be controlled during the sensitive period of weeds. For weeds that are seeded, young shoots and seedlings are more sensitive to herbicides, so this period is often a suitable period for herbicide use. It is usually better to control the seedlings before sowing or weed 1-2 leaves. When broad-spectrum herbicides are used, such as Gramoxone, Glyphosate, and Roundup, etc., they should be used when the weeds are more sensitive during the lush growth period, and the effects of weeding are obvious, and they have a long effective period. If weeding in spring and summer farmland, weeds should be in the early stages of weed growth. Select pests during the fasting period. From the point of effective control of pests, the release of poisonous lice should be controlled to be better during the fasting stage of rats. Years of experiments have confirmed that the spring rodent control works best. This is because the rat's winter food is exhausted and there is a corresponding increase in the feeding of poisonous ticks. At the same time, the spring rodent control can also reduce the number of bases and protect the normal emergence and safe growth of spring planting crops. . Select plant safety period. Select spraying when the crop has strong resistance to pesticides, so as not to cause crop injury. Select the safety interval. According to the standards for the safe use of pesticides, control shall be applied within the safety interval so as to avoid excessive pesticide residues and cause bad results. Corn Gluten Meal Lawn,Harmful Monosodium Glutamate,Dog Corn Gluten Meal,New Edible Starchy Tuber JILIN COFCO BIO-CHEM AND BIO-ENERGY MARKETING CO., LTD , https://www.cofco-biotech.com