Some vegetable farmers have not used pesticides many times, and the effect is not satisfactory. Not only does it waste a lot of financial and human resources, but also causes pesticide residues in vegetables to exceed the standard, affecting the commercial value of vegetables, and even losing the value of food. The reasons for this general phenomenon are as follows:
1. Vegetable farmers have not planned to use pesticides in order to reduce the resistance of pests and diseases, thus improving the control effect.
2. Do not pay attention to scientific use of drugs, do not use pesticides according to the prescribed dosage, number of medications, medication methods and safe intervals, increase the dose and number of uses without authorization, and think that the larger the dose, the more the use, the shorter the safety interval The better the effect of preventing pests and diseases, in fact, this is easy to produce the key, but also a cause of excessive pesticide residues in vegetables.
3, only the symptoms, not a cure. Diseases and insects on vegetables are rapidly multiplying, and vegetable farmers are accustomed to not seeing larvae seriously harming without drugs, and do not grasp the optimal control period of pests and diseases. For example, the optimal period of control of Plutella xylostella should generally be in the incubation period until the larval two-year age.
4 blind medication, delay the best prevention time. With the increase in the sales point of pesticides, some sales people who do not understand the technology often try to use the principle of taking the road. The effect of the A drug is not good, and then the drug is replaced, which delays the best prevention and treatment of the larva before the third age. time. On the other hand, many vegetable farmers look at other people's medications, no matter what the effect, as long as others buy what kind of medicine, everyone buys, used bad results, and then buy again, did not do the right medicine. This not only delays the optimal control period, but also increases the cost of prevention.
5. The mixture of pesticides is not scientific. Since most vegetable farmers grow a large area of ​​vegetables, spraying is indeed laborious and laborious. Therefore, the vegetable farmers think of ways to save labor and labor. Mix all pesticides, fungicides and plant growth regulators, and mistakenly think that the more types of compounding agents, the higher the concentration, the better the effect, resulting in many plots causing phytotoxicity. No way, then buy the medicine to solve the remedy. It also delays the optimal control period and increases the cost of prevention.
6. Improve the use of pesticides. It is necessary to use a spray machine with a small fog point to improve the effective utilization rate of pesticides. Some pests like to inhabit the heart and leaves of vegetables, so the spray can be even and thoughtful to achieve the control effect. At the same time, it should be noted that for the cabbages with more wax paper, 0.1% detergent powder should be added as the adhesive in the liquid.
Therefore, it is recommended that vegetable farmers must pay attention to safe, reasonable and scientific use when using pesticides to control pests and diseases. It is important to grasp the best prevention and treatment period for pests and diseases. In this way, the control effect can be achieved, and the number of medications can be reduced, and manpower can be saved.
1. Vegetable farmers have not planned to use pesticides in order to reduce the resistance of pests and diseases, thus improving the control effect.
2. Do not pay attention to scientific use of drugs, do not use pesticides according to the prescribed dosage, number of medications, medication methods and safe intervals, increase the dose and number of uses without authorization, and think that the larger the dose, the more the use, the shorter the safety interval The better the effect of preventing pests and diseases, in fact, this is easy to produce the key, but also a cause of excessive pesticide residues in vegetables.
3, only the symptoms, not a cure. Diseases and insects on vegetables are rapidly multiplying, and vegetable farmers are accustomed to not seeing larvae seriously harming without drugs, and do not grasp the optimal control period of pests and diseases. For example, the optimal period of control of Plutella xylostella should generally be in the incubation period until the larval two-year age.
4 blind medication, delay the best prevention time. With the increase in the sales point of pesticides, some sales people who do not understand the technology often try to use the principle of taking the road. The effect of the A drug is not good, and then the drug is replaced, which delays the best prevention and treatment of the larva before the third age. time. On the other hand, many vegetable farmers look at other people's medications, no matter what the effect, as long as others buy what kind of medicine, everyone buys, used bad results, and then buy again, did not do the right medicine. This not only delays the optimal control period, but also increases the cost of prevention.
5. The mixture of pesticides is not scientific. Since most vegetable farmers grow a large area of ​​vegetables, spraying is indeed laborious and laborious. Therefore, the vegetable farmers think of ways to save labor and labor. Mix all pesticides, fungicides and plant growth regulators, and mistakenly think that the more types of compounding agents, the higher the concentration, the better the effect, resulting in many plots causing phytotoxicity. No way, then buy the medicine to solve the remedy. It also delays the optimal control period and increases the cost of prevention.
6. Improve the use of pesticides. It is necessary to use a spray machine with a small fog point to improve the effective utilization rate of pesticides. Some pests like to inhabit the heart and leaves of vegetables, so the spray can be even and thoughtful to achieve the control effect. At the same time, it should be noted that for the cabbages with more wax paper, 0.1% detergent powder should be added as the adhesive in the liquid.
Therefore, it is recommended that vegetable farmers must pay attention to safe, reasonable and scientific use when using pesticides to control pests and diseases. It is important to grasp the best prevention and treatment period for pests and diseases. In this way, the control effect can be achieved, and the number of medications can be reduced, and manpower can be saved.
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