The use of pesticides to be particularly careful

Crop pest control should follow the " prevention first, comprehensive prevention and control " approach to minimize the frequency of use of chemical pesticides and amount , in order to mitigate environmental , quality and safety of agricultural products .

First, a good grasp of medication period. Most pests and diseases in the early stages , the symptoms are mild , such as cotton wilt disease early fungicide IRRIGATING effect, after the outbreak of a large area , even if multiple dosing , the loss is difficult to restore. Before the third instar caterpillar is easy to control . Therefore , the majority of sterilization, the effect of pesticides is not bad, but missed the best use of time .

Second, a good grasp of the dosage, water . Some friends of farmers in the use of pesticides , in order to reduce the workload , more drugs are often less water . In fact, the effective concentration of pesticides , the effect is good or bad depends on the coverage of liquid , such as knapsack sprayers spraying herbicide Butralin closed soil , the soil moisture is poor, you must increase the amount of water in order to form a closed membrane , or liquid only spotty distribution , reach closure weeding effect. In spraying insecticide, fungicide , sufficient water is necessary, because the eggs , germs are more concentrated in the surface of leaf , close roots in the soil, if less water when spraying , it is difficult to do the whole plant garden water sprayer spray thoroughly, the residual dead eggs , residual bacteria it is easy to outbreaks. Blindly increase the concentration of pesticide use will strengthen the bacteria, pest resistance, exceeding safe concentration injury will occur . Therefore, simply increasing solution concentration , often counterproductive .

Three is to choose the good performance of the application equipment . Should choose the regular manufacturers of Medical Device , regular replacement of worn nozzle. Spraying of herbicides should be dedicated Equipments .

Fourth, pay attention to the rotation medication. Even the best varieties of pesticides can not be long-term continuous use. Because, in an area where a certain kind of long-term single-use pesticides, will inevitably lead to the effect decreased, resulting in resistance to control objects , the correct approach is to rotate different types of pesticides.

Fifth, strict compliance with the safety interval specified. Pesticide safety interval refers to the last application to harvest crops, the number of days that the ban on the use of pesticides before harvest days . In actual production , the last crop spraying to harvest time should be specified on the label than the safety interval length . To ensure that agricultural residues are not exceeded, the security can not be harvested during the interval .