In order to be efficient and safe in the field of chemical and weed control in wheat fields, the number of weeds in the field, the application time, and the environmental conditions during the application of pesticides must be correctly mastered. So what are the efficient weed control measures in wheat fields? Let's listen to expert explanations together. To combine the climatic conditions during application, in general, the effect of weed removal is related to local temperature, humidity, light and other conditions, especially with the temperature. For the same amount of dimethyl tetrachloric herbicide, the herbicidal effect is 90% at a temperature of 14°C, and the weeding effect at a temperature of 9°C is 70% to 80%, whereas the herbicidal effect is only 50% at a temperature of 3°C. However, when it is actually used, due to the high and low temperatures in winter and spring, the changes should be large and should be carried out on a sunny day from 9:00 am to 4:00 pm. According to the number of weeds in wheat fields, weeds are sprayed when the weeds have not yet reached the end of the winter and early spring. At this time, the grass in the soil will sprout again in spring when the weather turns warm, which will harm wheat. Therefore, spraying should be carried out when 80% of field weeds grow. During the operation, the amount of weeds in the wheat field was used as reference. If the control time is too early, if the pesticide is sprayed too early, the wheat seedlings are less prone to phytotoxicity, but the weeds have not yet germinated; if they are used too late, the wheat strains are too dense, the population is large, the dosage is relatively increased, and the weeds grow vigorously. Has a certain resistance to drugs. Therefore, it is advisable to control it when the temperature is about 5°C in the spring.
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What are the effective weeding measures in wheat fields?