Diagnosis and Control of Herbicide Damage

In recent years, the application area and amount of herbicides have increased year by year, saving time for farmers to control famine and weeds, but due to human reasons, improper application of herbicides has also brought adverse effects on production. 1. Improper storage, blind misuse. Due to improper storage of herbicides, resulting in packaging label falling off or label corrosion, can not see clearly, herbicides are mistakenly used as pesticides, fungicides, or do not follow the instructions of the herbicide label, resulting in drug damage. Preventive measures: take good care of the herbicide to prevent the packaging label from falling off. if you find that the label is missing, you should immediately affix a new label indicating the name of the herbicide and the method of application. two。 Too much medicine, too much concentration. The dosage and concentration of herbicides are more stringent than insecticides and fungicides. Each herbicide has a prescribed dosage. For example, excessive use of superstars can cause drug damage to wheat. Preventive method: strictly control the dosage and concentration of herbicides. 3. The method of medication is inappropriate. If the herbicide is not used properly, it will cause drug damage. For example, when many herbicides are applied, they are easy to cause drug damage when they are contaminated on seeds; when herbicides are sprayed near sensitive crops and there are strong winds, a large number of dewdrops drift on sensitive crops and cause drug damage. Prevention methods: according to weeds, herbicides, environmental conditions, choose different application methods, skillfully master the technical points of safe and efficient application of herbicides. 4. Blindly mix pesticides. The mixed use of herbicides can improve the effect of weeding, treat diseases, insects and weeds at the same time, save medicine, and has the advantages of saving labor, time, money and so on. However, if blindly mixed, it will not only have no synergistic effect, but will reduce the efficacy and cause drug damage. Prevention: the chaotic use of herbicides is prohibited. The mixed use of pesticides should first do the mixed observation, efficacy and damage test. According to the experiment, the common varieties that can reduce the efficacy and cause drug damage after mixed use are: paspalum, organophosphorus and carbamate pesticides; the mixed use of grass grass and bentazone; the mixed use of dimethyltetrachloride and acid pesticides; and the mixed use of propofol and bentazone. Can cause drug damage.