Why is the pesticide effect poor after application?

Pesticides are the main substances used to control pests and diseases during crop growth. Rational use of pesticides is a key measure to ensure normal crop growth, but when we use pesticides, many people fail to use them correctly. This leads to poor results after the pesticide is applied. So what exactly causes poor pesticide efficacy after application? Below, the editor will give a brief introduction for everyone. Let's take a look together!

1. Emphasis on treatment over prevention

Many people, when using pesticides, focus mainly on treatment rather than prevention. Although larvae have relatively weak resistance to pesticides, their resistance gradually increases as they grow. Therefore, when controlling pests and diseases, we should carry out control at the young larval stage before the third instar. At this time, the pest population is small, and they have not yet fully begun feeding and causing damage. However, because many people do not understand the mechanism of action of insecticides and fungicides, whether protective or curative, they only apply the pesticide after pests and diseases have already begun to spread, resulting in major economic losses and poor disease control results.

2. Improper concentration

Many people do not have a standard preparation standard when mixing pesticides, and only use vague containers such as bottle caps for mixing. This can easily lead to the pesticide concentration being too high, exceeding its range, and making the pesticide resistance in pests and pathogens stronger and stronger. Some people also think that the higher the concentration, the better the control effect of the pesticide. In fact, when applying pesticides, if the concentration is high and the water is insufficient, it is very difficult to spray the entire plant, and it easily causes phytotoxicity. Undesirable phenomena such as crop deformity are prone to occur, and the pesticide efficacy will naturally be relatively poor.

3. Pursuit of quick effect

There are currently many varieties of pesticides on the market. Among them, fast-acting pesticides are common, and many people like to choose fast-acting ones when using pesticides. For common pesticides such as abamectin, because they mainly inhibit molting of pests or kill insect eggs, the visible effects are not many, so they are not popular among farmers. However, if people blindly pursue fast-acting pesticides, these pesticides are generally mainly highly toxic and highly poisonous pesticides, which leads to serious excessive pesticide residues in the produced products, and also easily causes excessive vegetative growth of crops, affecting yield.

4. Other reasons

The occurrence of pests and diseases actually follows patterns. Therefore, when controlling pests and diseases, we should pay attention to controlling them according to these patterns. We should also do a good job of protecting natural enemies of pests. However, when spraying pesticides, many people only act according to their own habits and apply pesticides regardless of whether there are pests or diseases, so the effect is naturally not very obvious. In addition, many people use a single pesticide variety for a long time. Even if the control effect declines later, they do not change the pesticide, but instead keep increasing the dosage. As a result, the larger the pesticide dosage, the stronger the pest and disease resistance, which not only easily leads to a vicious cycle, but also makes crops highly prone to phytotoxicity.

The above is a brief introduction to why the pesticide effect is poor after application. That is all for today's introduction. This article is for reference only, and I hope it can help everyone!