How to determine the harm of pesticides?
How to determine the harm of pesticides? Please introduce the methods for the drug damage caused by crops. Due to the existence of disease factors, fertilizer deficiency factors and crop physiological obstacles, it is more difficult to identify. After encountering drug damage, if the crop grows abnormally, the diagnosis should pay attention to the following points: first, whether the abnormal symptoms of crops occur in the later stage of pesticide application, we should verify whether the variety, period, dosage and usage of pesticides used are correct. Second, to investigate whether there are different abnormal symptoms in the adjacent fields of the same crop, in order to rule out non-drug harmful factors. Third, be familiar with the symptoms and occurrence regularity of crop diseases, drug damage and nutrition deficiency, and pay attention to distinguish them. Fourth, the biological culture method and anatomical method were used to check the changes of crop tissues and cells where abnormal symptoms appeared and whether there were pathogens. This is a more accurate diagnostic method. Click to get more pesticide application techniques
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How to use 25% Kailun fungicide?
How to use 25% Kailun fungicide? Please introduce the large-scale expansion of cash crops, mainly fruits and vegetables, with the development of benefit agriculture. Subsequently, diseases of various cash crops occurred, which seriously affected the high quality and high yield of agricultural products and the increase of farmers' production and income. Especially grapes, our province in the whole growing period.
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Which pesticides will cause drug damage to fruit trees?
Which pesticides will cause drug damage to fruit trees? Please introduce the pesticides that will cause drug damage to fruit trees: omethoate: apricots, pears, peaches, figs and other fruit trees are sensitive to the dilution concentration of less than 1500 times, and are extremely prone to drug damage when sprayed. In addition, use as little as possible in high temperature (more than 30 ℃) season.
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