Why the efficacy of pesticides is poor after use

Pesticides are the main substances used to control diseases and insect pests in crop growth. Rational use of pesticides is the key measure to ensure the normal growth of crops, but when we use pesticides, many people do not have a correct use method. It leads to the poor effect of pesticides after use. So what are the specific reasons for the poor efficacy after the use of pesticides? The following editor will give you a brief introduction, let's have a look!

1. Pay more attention to treatment than prevention

When many people use pesticides, they will give priority to treatment rather than prevention. Although the resistance of larvae to pesticides is relatively poor, they gradually increase their resistance to pesticides with their growth. Therefore, when we control diseases and insect pests, we should carry out control at the young stage before the third instar of pests. At this time, the number of worms is small, and it has not yet completely begun to eat harm. However, because many people do not understand the mechanism of insecticidal and germicidal action. No matter it is protective or therapeutic, it will not be applied until the epidemic of diseases and insect pests begins, resulting in a large amount of economic losses and poor disease prevention.

2. Improper concentration

Many people do not have a standard standard when preparing pesticides and only use fuzzy utensils such as bottle caps. As a result, it is very easy to cause the concentration of pesticides to be too high, beyond its range, and to make the drug resistance of diseases and insects become stronger and stronger. And some people think that the higher the concentration is, the better the control effect of pesticides will be. in fact, when applying pesticides, if the concentration is high and the water is less, it is very difficult to spray the whole plant, which can easily lead to drug damage. Crop malformations and other adverse phenomena are easy to occur, and the efficacy of pesticides will naturally be relatively poor.

3. Pursue quick effect

There are many kinds of pesticides on the market now. Among them, the common ones are quick-acting pesticides, and many people like to choose quick-acting pesticides when using pesticides. For common pesticides such as avermectin, because it is mainly to inhibit the molting of pests or kill eggs, the effect is not much visible to the naked eye, so it is not welcomed by farmers. However, if the blind pursuit of quick-acting pesticides, then these pesticides are generally highly toxic pesticides, resulting in the production of products, pesticide residues seriously exceed the standard, but also easy to cause crop overgrowth, affecting the yield.

4. Other reasons

In fact, there are rules to follow in the occurrence of diseases and insect pests. Therefore, when we control diseases and insect pests, we should pay attention to the prevention and control according to its law. And also do a good job in the protection of natural enemies of insect pests. And many people in spraying pesticides, only according to their own habits, regardless of whether there are diseases and insect pests, the effect is certainly not very obvious. In addition, many people will use a single variety of pesticides for a long time. Even if the control effect decreases in the later stage, it will not change the dressing, but constantly increase the dosage. As a result, the greater the drug dosage, the stronger the resistance to diseases and insect pests, which is not only easy to lead to a vicious circle, but also prone to drug damage in crops.

The above is why the use of pesticides after the poor efficacy of a brief introduction. That's all for today's introduction. This article is for reference only. I hope it can help you all.