According to farmers' friends, bio-pesticides have also been used, but the effect of insecticidal sterilization has been found to be too slow, and there is no such thing as chemical pesticides. Moreover, the price of bio-pesticide is too high. Usually, a pack of bio-pesticides can buy three or four packs of conventional chemical pesticides, which is not cost-effective. In fact, the key issue still appears to be correctly applied. The China Pesticide Network Xiaobian will explain how to use biopesticide correctly.
1) The use of biological pesticides should be carried out on the one hand to control the humidity in the shed by means of air release and warming, diligently picking up old leaves and residual flowers, and reducing the occurrence and development of pathogens; on the other hand, pay attention to root-protecting leaves and improve the disease resistance of crops. Spraying biological pesticides once every half month, adding foliar fertilizer, the disease will be lighter. Especially in the prevention of root diseases, biological pesticides are promising.
After the deep winter, the eggplant grows strong and the eggplant is covered with eggplant, which is in sharp contrast with the decline of the eggplant in other vegetable farms. The key is to use an early word, to use it in advance, to give the biological pesticide enough "reaction time", to expand and proliferate, in order to win the competition with the pathogen, to achieve the purpose of preventing pests and diseases. When the disease has already occurred and the pathogens multiply, the bio-pesticide is used. The pathogen is in a period of rapid expansion, and the bio-pesticide has just been used in the greenhouse. Even if there is an advantage, the play will be limited.
2) Check the bio-pesticide and fake a bag of Bacillus thuringiensis in the refrigerator for 24 hours, then mix it into the sprayer and spray a line of yam; then take another bag of un-frozen, biological pesticide at room temperature and spray it on another yam. on. After 10 days, comparing the growth of two rows of yam, it was found that the yam of the bio-pesticide sprayed at room temperature was obviously better, the leaves were thicker and green, and the pests and diseases were less, while the other group had worse performance. This shows that the biological pesticides bought by Master Liu are genuine, because when the bio-based pesticides encounter low temperature, the bacteria will inactivate a part of the death, thus losing the original effect. If there is no difference between the two lines of yam after spraying, it means that the product is fake.
China Pesticide Network reminds everyone that it can't be sprayed with chemical germicide, avoid spraying in high temperature and strong light or drought environment, try to choose windless cloudy spray, sunny weather should be suitable at temperature (18-25 °C), Spray in the morning or evening with higher humidity and less evaporation. In a word, biological pesticides are alive, and all conditions that inhibit the survival of biological bacteria, such as high temperature, strong light, chemicals, etc., should be avoided.
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