The target of prevention is not clear
In the crop growth period, several pests and diseases often occur at the same time. The pesticides are abused without understanding the biology and living habits of various pests, such as pyrethroids to control red spiders, and even insecticides to control diseases.
Poor spray time
There are two situations in which the best prevention and treatment period can not be grasped. First, it is not timely to fight drugs. No pests and diseases are not used. It is seen that a large number of pests and diseases have been re-dominated, and even the best time for spraying drugs has been delayed. Although it has been used repeatedly, it has been effective. Micro; another situation is not to use the drug according to the index, see the worm to cure, during the growth of crops, at any time, a small number of lesions or pests can be seen, see the worm to cure, see the disease to prevent, insects, insects, insurance, rest assured Medicine, wasting manpower and financial resources.
Poor spray quality is difficult to fight drugs, save trouble, the liquid cloth is not in place, uneven, the plant inside the sputum, the back of the leaf often does not take the drug, and some randomly increase the diameter of the sprayer, even remove the piece, so that the drug is sprayed The liquid does not uniformly contact the worm body, so it is difficult to obtain a better control effect.
Regardless of the weather, time, and random use of drugs regardless of high temperature, high humidity, wind and other weather, free to fight drugs, resulting in poor control, and even phytotoxicity or personnel poisoning.
Pest resistance
First, the single use of the drug, found that a certain pesticide is good for long-term use, so that the pest quickly develops resistance;
Second, arbitrarily increase the concentration and dosage of the drug. Many people think that the drug or concentration is effective after seeing the insect in 2-3 minutes after use. Otherwise, the drug dosage will be increased, and the pest will quickly develop resistance.
Improper drug compounding
Unclear characteristics and functions of pesticides, blind blending, resulting in reduced efficacy or phytotoxicity.
Ignore biological control
Spraying does not pay attention to protect natural enemies. It is accustomed to use a wide spectrum of highly toxic pesticides such as parathion, which causes a large number of killing natural enemies. Although it is frequently used, the effect is not good, and the pests are more embarrassing.
Identify the target of prevention and treatment, use the right medicine correctly, and do the right medicine
First of all, we must understand whether the disease is a disease or a pest, what disease or insect is involved, and at the same time, we must understand the characteristics of the pesticide, the object of prevention and treatment, the method of use and precautions, and select the corresponding pesticide type according to the different species, stage of occurrence and development stage of the pests and diseases. , dosage form and concentration, to achieve the right medicine.
Do a good job of forecasting and forecasting, timely medication
Forecasting and forecasting is the basis of pest control. In practice, it should be noted that on the basis of detailed investigation and forecasting, the dynamics and laws of pests and diseases should be accurately understood, and various factors affecting their occurrence and development should be clarified and implemented when they are really needed. At the same time, it should be considered that the application should be the weak link in the life history of the pests and the damages, such as the younger stage before the third insult of the pests and the small amount of insects. Prevention and treatment of diseases should be carried out before the initial infection or before the episode has not spread.
Improve spray quality
According to the different parts of the pests and plants that inhabit the plants, different application methods or instruments are used. For example, the hawthorn spider mite is harmful to the back of the fruit leaves, and there are more cockroaches in the early period. After reaching the control index, the whole tree is spread. Master the "snoring, circling around the tree, smashing the hole and smashing the inner sputum", in the order of "first down, then up, first inside and outside", so that the whole tree sprays evenly and thoughtfully, the worm body is evenly medicated; At the time of spraying, it must also be noted that the pressure of the spray is large, and the spreadability on the plants is good.
Choose weather and time
Fighting drugs should pay attention to the weather changes, try to arrange for good weather, do not fight drugs when it is raining or raining, so as not to affect the efficacy.
Avoid pest resistance
Rotate the dosage of the agent and control agent using different mechanisms of action. Tests have shown that the use of high-concentration agents produces faster drug resistance than low-concentration agents, so it is important to avoid increasing the amount of drug during use.
Scientific mixed pesticide
After the pesticide is mixed, there should be no physical or chemical adverse reactions, such as reduced drug efficacy after mixing, increased toxicity or precipitation to humans and animals. Alkaline pesticides can not be mixed with acidic pesticides, the microbial pesticide of pesticides can not be mixed with the acid, will produce mixed precipitation of copper sulfide, copper ions would produce excessive crop phytotoxicity after dissolution, it is difficult to mix.
Protect and utilize natural enemies
When the number of pests is small and there are more natural enemies, there is no need to spray the medicine, and there are many pests. If it is not sprayable, it is not possible to use pesticides with low efficiency and low toxicity to natural enemies.
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