How to determine pesticide phytotoxicity? These judgment methods are worth knowing
How to determine pesticide phytotoxicity? Please provide an introduction to the methods. For phytotoxicity caused to crops, the existence of factors such as disease, nutrient deficiency, and crop physiological disorders increases the difficulty of identification. When phytotoxicity occurs and crop growth is abnormal, the following points should be noted in diagnosis: First, the abnormal...
How to determine pesticide phytotoxicity? Please provide an introduction to the methods
For phytotoxicity caused to crops, the existence of factors such as disease, nutrient deficiency, and crop physiological disorders increases the difficulty of identification. When phytotoxicity occurs and crop growth is abnormal, the following points should be noted in diagnosis:
First, whether the abnormal symptoms appearing in the crop occurred within the period after pesticide application should be verified, and whether the pesticide variety used, the timing of use, the dosage, and the method of application were correct.
Second, investigate whether adjacent field plots of the same crop show different abnormal symptoms, so as to rule out non-phytotoxicity factors.
Third, become familiar with the symptoms and occurrence patterns of crop diseases, phytotoxicity, and nutrient deficiency, and pay attention to distinguishing among them.
Fourth, use biological culture methods and anatomical methods to examine the parts of the crop showing abnormal symptoms for changes in crop tissue cells and the presence or absence of pathogens. This is a relatively precise diagnostic method.
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