The author recently learned from the fields in rural areas that some middle-aged and old-aged farmers often suffer from economic losses as a result of improper use of pesticides, causing crop injury and environmental pollution. In this regard, the author suggests that farmers should pay attention to four points when fighting pesticides and pests:
A pesticide that cannot be mixed or used alone will cause a reduction in pest control and damage to crops. Take cotton as an example. If pesticides are used improperly, they will injure buds, flowers, bells and peaches of cotton; Some pesticides can not be used alone, and long-term single use will make cotton pests and disease resistance, the effect is getting worse. The author suggested that the use of crops should be alternated as well.
Second, we must not ignore the performance of pesticides, the blindness of the level of drug efficacy Some pesticides apply only to certain crops, used in other crops, not only ineffective but also harmful, so to symptomatic, according to the dose of drug. (For example, prevent the second-generation late rice three generations of rice stem borer, four generations of rice stem borer pests, per acre with wolfberry Shi net emulsion 50 ml, 901 synergist 30 grams, urn missed 50 grams of water plus 100 pounds, in the cloudy cloudy afternoon 4 After spraying, the effect is very obvious).
Three can not abuse pesticides Recently I saw some farmers use drugs, do not look at pesticide use instructions, free to increase the concentration, and some rely on their own experience to estimate the use of drugs. As everyone knows, increasing the concentration at will not only increases the cost, but also kills a large number of natural enemies of pests. The remaining pests multiply at an extraordinary rate, and in the short term they can grow to a greater number than they originally had.
Fourth, can not ignore the timeliness in the prevention and treatment of cotton bollworm, cotton bollworm, Spodoptera litura or second-rotary rice leaf roller, rice borer, rice planthopper, etc., should fight in the evening or cloudy days. In the prevention and control of the fourth-generation Sanhuai or third-generation stem borer, the grain-growing households must pay attention to the fight when the leaves are slightly dewy, because this time is the best time for the medicine.
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