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The purchase of pesticides must be based on the active ingredient. In addition to the pesticide registration certificate, the permit for production, and the manufacturer’s address, the active ingredients must also be indicated. For pesticides that do not contain the active ingredients, it is not clear which specific diseases or pests can be controlled. Should be considered counterfeit pesticides, it is best not to buy.
Take Shimao 10% water-dispersible granules and 40% Fuxing Emulsion as an example. The active ingredient of Seco is difenoconazole and the active ingredient of Fuxing is fluorosiliconazole. They are chemically synthesized triazole fungicides. The bactericidal mechanism is to inhibit the synthesis of fungal ergosterol, so that the bacteria can die; it has the functions of protection, treatment and eradication. Shigao and Fuxing are low-toxic to humans and animals and can be used for plant and environment safety, and produce pollution-free fruits and grade A green fruits.
For pesticides with high unit prices, the cost of medications is not necessarily high. It takes a lot of money to reduce the cost of pesticides used every year to prevent and control pests and diseases. However, after accounting, it will be found that the cost of pesticides with high unit prices is not high. Still taking 40% of Fuxing EC as an example, the price per liter (kg) of Fuxing EC is priced at 700 yuan, and the common concentration for controlling pear scab is 8000~10000 times. The use of 8,000 times is 8,000 kilograms of water per kilogram of Fuxing, and the calculation is based on 15 kilograms of liquid spray per tree, and the drug fee for each tree is 1.4 yuan. The use of Fuxing 3 or 4 times in the critical period can prevent pear black spot disease from reaching disease-free leaves and fruits. If the use of low-priced pesticides, due to the use of low multiple times, the cost of medication is not necessarily less, and the control effect is also difficult to compare with Fuxing.
Attention should be paid to the hypothesis that any pesticide is only suitable for a certain control object. Before a certain pesticide is sold as a commodity, strict indoor and outdoor tests and field demonstration should be conducted to clarify the control object and control effect. Good pesticides will identify the control objects, such as imidacloprid, Aketai, Aimele, aphids, whiteflies, leafhoppers, and hibiscus that are suitable for sucking mouthparts; 15% polymyxin is used to prevent and treat apple leaf spotted leaf disease , Pear black spot; Shi Leshi has high control effect against diseases caused by Fusarium and Rhizoctonia; Diflubenzuron and other insect growth regulators are suitable for the prevention and control of leaf leaf moth pests and mosquito pests. It has a high control effect against leafhoppers.
At present, some domestic pesticides have been seriously controlled, and some fungicides are labeled with many prevention and control targets, including bacterial diseases, fungal diseases (oomycete and non-oomycete diseases), and even virus diseases. This fungicide is not present. Exaggeration of the object of prevention and control is intended to attract buyers who do not know the truth.
Try to purchase a single dose, and use compounding agents with caution. Two or more pesticides are used for compounding purposes to complement each other and increase the effectiveness of control. The compounding of fungicides is to overcome or delay the germs of certain strains. Resistance to sexual fungicide production. Jinlei Duomi Mn-Zn, anti-virus, Kelu, Anke manganese zinc, Xiansheng, mold and more grams are good bactericidal compound. A large number of compounded pesticides appearing on the market, some have similar single-agent mechanisms of action, do not achieve synergistic effects; some are compounded with pesticides that prevent and control different types of insect pests. Although the formula is acceptable, only these insect pests are controlled. The indicator applies. However, it is difficult for two different types of insect pests to reach the control index at the same time. Using this compounding agent is actually a waste, increasing the cost of medication; some of the compounding agents do not indicate the active ingredient, nor do they indicate the content of the active ingredient. Should be regarded as inferior pesticides.
The author proposes that we should try to purchase single pesticides that are effective against certain diseases and insect pests, if there are two or more pests and diseases that need to be controlled at the same time, and when different types of pesticides are needed, we can select the targeted pesticides to mix themselves. It also does not rule out the use of formulas that are reasonably formulated.
Experts teach you to buy pesticides
Pesticides are an important means to control pests and diseases. They play an important role in the comprehensive prevention and control of diseases and insect pests. Even the production of AA grade green fruits is not a complete use of pesticides. At present, the pesticide market is extremely confusing. Many counterfeit pesticides have caused considerable losses for agricultural production and farmers' income. Therefore, farmers are reminded to pay attention to the following issues when purchasing pesticides.