Planting experts to share drug use skills!

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1. Chlorothalonil: can not be mixed with alkaline pesticides such as stone sulfur, such as paspalum, Bordeaux liquid, stone sulfur mixture, etc.

2. Carbendazim: it can be mixed with general fungicides, but it should be mixed with insecticides and acaricides, not with alkaline agents.

3. 64% germicidal alum: it is made from the mixture of oxalaxyl and mancozeb, which has internal absorption, conductivity and contact, and the control of downy mildew and white rust is stable to crops and is not easy to produce live drug harm, and various crops have high drug resistance to germicidal alum and will not cause drug harm. Germicidal alum and agricultural streptomycin are forbidden in cucumber seedling stage.

4. Oxalaxyl: it has high control effect on downy mildew pathogenic bacteria, has protective and therapeutic effect, and lasts for a long time. When mixed with mancozeb, its control effect is higher than that mixed with germicidal Dan and copper preparation, such as 64% evil frost manganese zinc wettable powder (detoxification alum).

5. Tomato gray leaf spot can be fumigated with 15% gram carbendazim fumigant (Chlorothalonil) for every 667 square meters.

6. How to use drugs to control tomato leaf mildew: (1) broad-spectrum fungicides: such as chlorothalonil (Dakening), promethazone (isobarbazide), methyl topiramate and so on. The advantages of this kind of medicine are: wide disease prevention spectrum, safety, low price and good prevention effect. The disadvantage is that the treatment effect is poor. Therefore, it should be used before the onset of the disease, or in conjunction with drugs with outstanding therapeutic effects. (2) azoles, such as nitrile clozole (Xiansheng), flucloclozole (Teflon), difenoconazole (Shigao), etc., have the advantages of remarkable therapeutic effect, low dosage, strong internal absorption and long effective period, but the disadvantage is that the dosage will inhibit crop growth. If the continuous use of drugs for more than three times, it is likely to cause tomato leaves to become smaller, hardened, brittle, blackened and so on, so it should be used with caution, especially in the period of low temperature in winter, except Shigao. When using this kind of agents, it can be combined with some growth regulators, such as brassinolide (Shi Dayuan, Yunda 120, etc.), cytokinin, etc., in order to reduce the side effects of inhibiting tomato growth.

(3) antibiotics, such as Chunleimycin, Polyantimycin, Nongkang 120, etc., these agents have the advantages of safety, broad spectrum, strong internal absorption, outstanding preventive effect, but poor therapeutic effect. Based on the characteristics of the above agents, the following drugs should be used when using agents to control tomato leaf mold: when the leaves are free of disease spots or the incidence rate is less than 5%, broad-spectrum fungicides, or Shigao, or antibiotic fungicides can be selected, or mixed use. When the incidence is higher than 5% and has a tendency to spread, azole fungicides should be selected. Of course, it needs to be used with plant growth regulators such as brassinolide and cytokinin. When the disease is particularly serious, azole agents can be mixed with broad-spectrum agents or antibiotics for comprehensive prevention and treatment.

7. Amisida: azoxystrobin, the germicidal spectrum of azoxystrobin is very broad, and it is effective against most of the pathogens in four types of pathogenic fungi: ascomycetes, basidiomycetes, half-knowns and oomycetes. One drug to treat multiple diseases is a prominent feature of amiceda, which is different from the existing fungicides with high activity. At present, the resistance of bacteria to amiceda is weak. Its strongest advantage is its preventive and protective effect, not its therapeutic effect.

Its preventive and protective effect is ten to dozens of times that of ordinary protective fungicides, and its therapeutic effect is almost no different from that of ordinary internal inhalation therapeutic fungicides. Therefore, in order to give full play to the effect of amiceda, it must be used before or in the early stage of the disease. When amiceda is used in the serious period, the disease prevention effect will not be significantly different from that of other internal inhalation fungicides. In order to give full play to the role of amiceda in disease prevention and yield increase, according to the local experience, it is the most suitable to use amiceda in the following three periods: first, in the seedling bed; second, in the early stage of flowering; third, in the early stage of fruit growth. Sufficient spraying water is also an important factor to ensure the effect of Amicida. In Shouguang, a 50-60 meter long greenhouse should be sprayed at least 4 sprayers (120 jin) at the adult stage (tomato, cucumber, eggplant, sweet pepper), and 80 meters long greenhouse should be sprayed with 6-7 sprayers. The concentration of each spray is 1500 times (1 packet of amicida per sprayer). The interval of each spray is 10-15 days, 2-3 times in a row. Amisida is usually used alone, so we must pay attention to it.

8, can kill: belong to copper hydroxide, trade name also known as crown fungus copper, Feng Huan, Blue Shield and so on. It can be used to control bacterial diseases in vegetables. Because of its strong protective effect, it can be used to control fungal and oomycete diseases before the disease. Because it is inorganic copper and alkaline, it can only be mixed with organic fungicides with stable structure, such as chlorothalonil and so on. It cannot be mixed with acidic drugs. It is also not suitable to mix drugs containing metal ions and foliar fertilizer. The mixture of thiophanate, thiophanate methyl, carbendazim and dimethomyl should not be mixed, and the colloid damage phenomena such as sedimentation and condensation after mixing should also be avoided. If it is not yet clear, the test should be done before determination, so as to avoid a drug damage.

9. Dysen zinc: it can control diseases caused by many kinds of fungi, but it has poor effect on powdery mildew. Control tomato early blight, late blight, spot blight, leaf mold, anthracnose, gray mold, eggplant cotton blight, brown stripe, etc., pay attention to cucurbitaceae vegetables are sensitive to zinc, the concentration should be strictly controlled, should not be too high.

10. Bensen zinc: it is a broad-spectrum and quick-acting protective fungicide. Another name is Antaisheng. To control downy mildew of Chinese cabbage, downy mildew of cucumber and early and late blight of tomato, Zinc Bensen is a protective fungicide, which must be sprayed before or during the initial period of the disease. Should not be mixed with copper preparations and alkaline agents.

11. Frost urea cyanide: the mechanism and characteristics of action are mainly to prevent the spore germination of pathogenic bacteria and to kill the bacteria in the invading host. It has the effects of protection, treatment and internal suction, and is effective against downy mildew and blight. The efficacy period of frost urea cyanide is short, which can be prolonged when mixed with protective fungicides such as propicin zinc. Suitable for cucumbers, grapes, peppers, potatoes, tomatoes and so on. Prevention and control of downy mildew and blight.

12. Enylmorpholine: other Chinese name: Anke is widely used in the control of diseases caused by flagellum oomycetes, such as vegetable downy mildew, blight, seedling sudden disease, tobacco black shank and so on.