How to deal with increased pest resistance?

issue

How did the pesticide not work?

In the Pearl River Delta region where I am located, farmers mostly plant small areas of vegetables, because the price of vegetables is high, the income is good, vegetable farmers are intensive farming, the planting requirements are relatively high, and some vegetables can be planted 10 stubbles per year. Farmers also do not hesitate to cost in production inputs, willing to use drugs, coupled with stubble planting, the amount of pesticides per mu is several times that of other regions.

With frequent medication, problems followed, and pests became more and more difficult to treat. Cruciferous vegetables on the small cabbage moth and yellow curved stripe jumping beetle are the two most headaches for farmers, due to increased resistance, some pesticide products in other areas can reach 80% to 90% of the control effect, in our local area can only reach 20% to 30%. Cabbage insects and beet moths on crops such as chives can be well controlled with methylphenidate salt in previous years, and what pesticides are used in outbreaks this year are not very effective. The cost of medicine for farmers has directly increased from a few yuan per mu to 20 or 30 yuan, and some farmers have little effect of spraying medicine at both ends for three days, and some places have even appeared to rely on the phenomenon of catching insects by hand.

Over the years, insecticides continue to be updated, we used up in the past few years, Caixi, Ruijin and other products, and then used Kang Kuan, and then later used Kane, Ai Lushi, but the new products used for a period of time Resistance on the rise, product updates have not been able to keep up with the speed of pest resistance development, we have also tried other areas to reflect good biopesticides, but in our high resistance areas it is not very effective, pest resistance is really a headache and helpless.

Guangdong Province Shenzhen Guangming New District pesticide dealer Kwong Kecheng

Ideas

The anti-viral rise should not be used alone

There are many reasons for the resistance of harmful organisms to pesticides, how to resist, can not rely only on drugs, but also comprehensive prevention and control. You can start from the following aspects:

Do a good job of pest monitoring. According to the development and development of the field pest population, decide whether to control, when to control, what method to control, after the control, according to the control results, monitor again, and decide whether to control again.

Adopt a comprehensive approach. Combine physical control, cultivation management, crop rotation, natural enemy biological and pesticide control. Even if drug control, the principle of combining chemical pesticides, plant-derived pesticides, biological pesticides, sex attractants and chemical repellents can be adopted.

Rational use of chemical pesticides. For a single pest, when the use of pesticides with a narrow control spectrum or strong targeting is sufficient to deal with, the use of broad-spectrum pesticides or a mixture of multiple pesticides should be avoided as much as possible. If the use of imidacloprid to control aphids can control the harm, if you add pyrethroid pesticides, organophosphorus pesticides, and even increase the amount of single dose, not only caused waste, but also bound to lead to resistance, and once this multi-resistance is generated, it is difficult for general agents to control.

Choose the right time to take medication. For example, insecticides and acaricides should choose the stage when pests are most sensitive to the agent, different agents are sensitive to pests at different stages, if they are sensitive to larvae and have an egg killing effect, they can be used in the early stage of pest occurrence, some have strong killing power for larvae or nymphs, and can be used in the pest peak period and before, and for older pests, pesticides with fast knockdown speed and strong suction permeability should be selected for control.

Rotate and mix pesticides. Due to the existence of cross-resistance, the reuse of the same and the same type of pesticide should be avoided, and all effective types of pesticides used alternately or mixed should be conducive to delaying the resistance of pests and avoiding the mixing of different products of the same type.

Try old medicines for new uses. Some pesticides have been discontinued for many years due to their resistance, and when they are resistant to other pesticides, they may have unexpected effects if they try these pesticides.

Protect predators. Try to choose pesticides that are relatively safe for predators. For example, the red-eyed bee is the natural enemy of most green insects, and when controlling pests, try to choose a pesticide that is lowly toxic to the bee, which is conducive to protecting the red-eyed bee.

Take advantage of new technologies. For example, insecticidal insecticide uses insecticidal lamps, insect repellent nets, sex hormones, natural enemies, etc. for prevention and control; decomposition diseases are sprayed with film-forming agents to protect scraped spots or cut cuts to prevent and control germ infestation; orchards use grass or grass covering instead of agents to prevent weeds.

In short, pest and disease resistance is a complex and realistic issue, and discussion and governance of this will be a long-term topic. I hope that this article can attract everyone's attention, the correct and rational use of pesticides, and the comprehensive prevention and control to delay or solve the resistance of pests to pesticides. Yantai Mu Danyang Pharmaceutical Co., Ltd. in Jingwei