10 combinations in the use of pesticides

First, the combination of pest control and protection of natural enemies in different periods of different types of pests, the types of natural enemies are also different, in the prevention and control of harmful organisms, to protect the use of good natural enemies. For example, some plants have a serious occurrence of certain plant leaf mites, while leaf-eating pests are lighter and fail to reach the control index. Therefore, when using the drug, you can choose 15% scented emulsifiable concentrate, 20% sputum sputum, and other specific acaricidal agents . Do not use broad-spectrum insecticides such as Kung Fu and Zhanshi.

Second, biological drugs and chemical pesticides combined with biological bacteria such as Bacillus thuringiensis and Beauveria bassiana have strict requirements on temperature and humidity. After hitting the target, there is a physiological and biochemical process in the harmful organisms, which is slower, but The efficacy of the drug lasts for a long time, and most of the chemical pesticides have the effects of knockdown, contact, fumigation, systemic absorption, stomach toxicity, etc., and the effect is quicker.

Third, the combination of insecticides and fungicides in production often disease and insects occur simultaneously with the growing season, so the use of mixed pesticides should be used in prevention and control. For example, the occurrence of pear hibiscus is also the period of pear black spot disease, which can be controlled by 10% imidacloprid WP 5000 times solution + 40% carbendazim WP 1000 times mixture.

Fourth, the use of pesticide methods, concentrations and different dosage forms, different levels of combined pesticide manufacturers, in order to adapt to different regions, different uses, the drug into different dosage forms, content. Therefore, when using pesticides, it is necessary to combine different dosage forms and contents, and choose different methods and concentrations.

5. Combination of medicinal agents with different types of harmful organisms Whether it is insecticides or fungicides , a considerable part is targeted at certain types of pests or certain pests, or even different periods of certain types of pests (nymphs). , larvae, cockroaches, adults, eggs) mainly developed, such agents for other types of pests control effect is poor or only auxiliary, or even invalid.

Sixth, the prevention period and the combination of drug and dose at different developmental stages of the plant, the same type or a different period of the occurrence of a certain pest to the agent is not the same, the use of drugs and doses are not the same. For example, avermectin has an effect on larvae and eggs, but has no effect on cockroaches and adults. It cannot be used in the flood season and adult stage. For example, arsenic mixture (sulphur-sulfur suspension) is used to control pear hibiscus and Kang’s. Whitefly, the different degrees of Baume used in different periods, generally 3-5 degrees before the pear white period, and 0.3-0.5 degrees after the balloon period, otherwise it will cause phytotoxicity.

7. The concentration of the drug is combined with the temperature and humidity, and the combination of strong and weak sunlight. In production, the higher the temperature, the more severe the pests occur. Many fruit farmers use pesticides at higher concentrations, but they still cannot be cured. In fact, the main reason for the failure is that the leaves are large, the second is the thick leaves, and the third is the concealment of pests, which brings certain difficulties to the operation. Whether it is an insecticide or a fungicide, its control effect is greatly affected by the temperature and humidity, and the strong and weak sunlight. Under normal circumstances, the higher the temperature, the worse the stability of the pesticide's drug properties, the faster the decomposition, the higher the drug effect, then the concentration should be relatively low. The greater the humidity of the fungicide, the worse the effect, and the relative use concentration should be increased.

8. Combination of specific use, alternating use and mixed use of pesticides in prevention and control.

9. The choice of pesticides to be combined with the sensitivity of plants to pesticides is sensitive to certain pesticides. For example, peaches, cherries, apricots, and plums of the stone fruit are sensitive to dichlorvos, which may cause a large number of deciduous fruit. Such plants should be banned; some insecticides and bactericides use a slight concentration to cause Sydney tiger skin disease, which seriously reduces the value of the commodity.

Ten, the use of pharmaceutical agents and the use of additives, regardless of fungicides or insecticides generally spread, poor permeability, coupled with the protection of the pest's own protective film or secretions, to prevent such pests It is a big difficulty. It has a good penetration and spreading effect, and it is very effective to add 0.3% detergent or 1000 times of harm to the pests such as pear flower nets, pear hibiscus and scale insects. Good penetration and exhibition to enhance the efficacy.