The author is one of the most basic agricultural resource dealers. He often encounters unscientific and unreasonable use of pesticides in rural areas.
Many farmers in the process of controlling pests and diseases, see insects only fight insects, see the disease before treatment, there is the psychological to play the insurance drug, arbitrarily increase the amount and frequency of medication, not according to the instructions, do not consider control indicators, medication time, drug concentration , Blending methods, etc., I would like to use it, so that we can not reach the expected pest control effect, but also increased the amount of pesticides, resulting in a waste of manpower and material, and high concentrations, irrational blending can also cause burns , Burning seedlings and other injury accidents.
Therefore, it is very important to promote scientific and rational use of medicines to cultivate farmers' scientific drug habits. Specifically, it is critical to do the following:
The first is the selection of pesticides on the road. Correct selection of the required pesticide species based on different crops, different pests and weeds, and the right medicine for the disease is the key to achieving good control effects. Otherwise, not only is the effect poor, but it also wastes pesticides, delays the timing of prevention and control, and causes losses to agricultural production.
The second is to take timely medication. Diseases, pests and weeds at different stages of development have different resistance to pesticides. In terms of insect pests, generally the 3rd instar larvae are weak in resistance, and the use of drugs before the 3rd instar is preferred. In terms of disease, the resting spores of pathogenic bacteria are resistant to drugs, and the resistance to the spores is weakened when the spores germinate. In terms of grass damage, weeds are more sensitive to pesticides in the buds and primary stages, and they gradually increase in resistance as they grow. Therefore, in the use of pesticides must be based on disease, insects, grass conditions and the number of natural enemies investigation and forecasting, timely control of the use of drugs to achieve prevention and control indicators.
The third is to strictly control the amount of medication. The recommended dosage of pesticide labels or instructions is generally determined after trial and error, can not be used to increase or decrease in order to prevent crop damage or affect the control effect.
Fourth, spraying should be even and thoughtful. Most of the insecticides and fungicides used today are mainly conducted to the upper part of the plant, and are rarely conducted downward. Therefore, they must be evenly and thoroughly sprayed, should not be sprayed without spraying, and should not be sprayed when the wind blows. Ensure good control effect.
Fifth, adhere to the rotation of drugs, delaying the emergence of pest resistance. Pesticides will inevitably produce drug resistance during use. If a single region uses a single pesticide for a long period of time, it will accelerate the development of drug resistance. Therefore, when using pesticides, we must emphasize the rational rotation of different types of pesticides to increase the life of pesticides.
Sixth, it is reasonable to mix and use pesticides. When compounding and mixing pesticides, one principle must be followed: After two or more pesticides are used together, they cannot be chemically changed. Otherwise, the decomposition of active ingredients will fail, and harmful substances may even be generated, causing phytotoxicity. The physical properties of pesticides mixed in the field should remain unchanged. Mixed pesticide species require different modes of action and concurrent control of different control objects, so as to achieve the purpose of expanding the scope of control and enhancing the control effect after pesticides are mixed.
To sum up, as long as establish a scientific concept of medication, pay attention to prevention, try to cure early and early small, timely and accurate prevention and treatment, use drugs on the right, properly handled, can naturally reduce the amount of pesticides down.
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