Long-term use of a single pesticide resistance increases every year . In the course of the use of pesticides , pesticide control effect once found a good, long-term continuous use, even anti- drop effect is not replaced, that anti- drop effect is low pesticide content , did not realize that this is caused by long-term single use of a pesticide consequences. As 1978 6000 times with Fenpropathrin spider mite control , the control efficiency above 98%, now with 1000 times less than 50% control efficiency . backpack weed sprayers The country has more than 30 kinds of insects, 10 kinds of diseases that cause resistance to pesticides , farmers use to increase the dosage of the ways to improve the control effect , the results for the screening of the antibiotic into stronger offspring, continue to improve the drug concentration , worms resistant to further improve , resulting in a vicious cycle , do not solve the problem. Therefore, in the course of the use of pesticides , must pay attention to several pesticides alternating rotating, or reasonably mixed , thus extending the useful life and improve control effect.
Mixed use of pesticides, pay attention to a reasonable match. Should use a different mechanism of action of pesticides used interchangeably or in accordance with a reasonable physical and chemical properties of pesticides mixed use , so not only can improve the control effect,perfume sprayer but also delay the generation of pest resistance . Pesticide mixtures should pay attention to the following questions: ① after mixing pesticides increased efficacy or effect independently of each other , a
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