After the rain, the pests and diseases of the vegetables in the field are rising, especially the small and often neglected devastating pests such as sassafras, larvae, and whitefly are threatening the growth of vegetables in the field. First, pests 1. Liriomyza sativae At present, the vegetables such as loofah, cowpea, cucumber and "three eggplants" are reproduced and harmed from the bottom up, and tend to occur more heavily. It should be sprayed and controlled at the peak of egg hatching. The applicable drugs are 50% chlorfenapyr water-soluble powder, agricultural land 52.25% chlorinated cyanide chlorpyrifos EC, 30% Avi·killing WP, Kungfu 2.5% high-efficiency chlorofluorocyanide Pyrethroid EC, 48% chlorpyrifos EC, 40% dimethoate, etc. 2, sassafras At present, hazards have formed on most vegetables, and high temperature and drought are extremely beneficial to their occurrence. It can be sprayed with 24.5% Avi diesel emulsifiable concentrate, 5% thioxanthene emulsifiable concentrate, ketone 73% acetylene emulsifiable concentrate, agricultural land 52.25% chlorocyanide chlorpyrifos emulsifiable concentrate, etc., focusing on the back of young leaves. 3, whitefly In recent years, the whitefly has developed from the autumn to the four seasons, and the vegetables in the protected areas are the most seriously affected. At present, it is harmful on eggplant, tomato, pepper, cucumber and cowpea. It can be controlled by imidacloprid and lambda-cyhalothrin spray. 4, bean wild 螟 This year's moderately heavy occurrence can be sprayed at 7 to 10 am. The applicable drugs are Bacillus thuringiensis and fenvalerate. 5, twenty-eight star ladybug At present, the amount of insects on the eggplant is large, and attention should be paid to catching the insects and picking up the eggs, and spraying with fenvalerate, deltamethrin, and lambda-cyhalothrin before the larvae are dispersed. Second, the disease 1, bacterial angular spot disease Various cucurbit crops such as cucumber and melon can be harmed. Sterilization of seeds and sealing of greenhouses after irrigation in summer are conducive to disease prevention. 72 & agricultural streptomycin wettable powder, 2% spring leimycin WP, Feng Huan 77% copper hydroxide wettable powder, Jiaruinong 47% Chunlei·Wang copper WP powder spray prevention, pre-injection The effect of the drug is good, and it is difficult to effectively control the application after the onset of the disease. 2, viral disease Summer and autumn are the most frequent seasons of solanaceous vegetables and viruses, and should be taken to prevent disease. The seedling bed is sprayed with alkanol, copper sulfate (phytopath) or strontium acetate (virus A) spray, once every 7 to 10 days, and continuously controlled 2 to 3 times. 3. Other diseases At present, the onychomycosis and legume vegetable powdery mildew is younger, but the protected area is heavier; the disease of bean rust and gray mold is rising faster, the rust is mainly in the protected area, and the gray spot is mainly in the open field. These diseases can be controlled with a triazolone spray. Pharmaceutical Intermediates,Cytidylic Acid 99%Min,White Powder Alareline Acetate,2-Acetylpyrazine 99%Min Henan Tianfu Chemical Co.,Ltd , https://www.tianfuchem.com
Prevention and control of pests and diseases in vegetable fields at high temperature