Pesticide resistance : Means when insects/disease contact the pesticides , it will develop resistance by following generations .
The reasons for developed resistance :
A、Target insects selective evolution
After many years of use of chemical pesticides, the group’s own structure (including immune effects, gene changes, thickening epidermis, enhancement of detoxification ability, etc.) will change, thereby changing, thereby generating resistance.
B、Target insects/diseases fertility characteristics to produce anti -drug resistance
For example, aphids reproduce dozens of generations a year, which is prone to drug resistance; wheat rusty diseases, the amount of spores are large, the explosiveness is strong, and it is prone to drug resistance.
C、Inappropriate applying methods
–Applying same pesticides repeatedly during a long time
–Increase the application concentration randomly
–Spraying unevenly
How to delay pesticide resistance
A、Apply Mixture formulation
1、Choosing compound pesticide formulation,such as Organic phosphorus pesticideand and Chrysanthemum pesticide.
2、Choosing larvacide and non-larvacide compounds .
3、Mixed apply the Pesticides with different ways to kill,such as mix use with Internal pesticides and contact-to-kill/fumigation pesticides .
B、Applying pesticides during target insects/diseases most sensitive stage .
Pesticides 
uring larva stage
Herbicides uring seedling period
Fungicide isease early stage
C、Do not increase the apply concentration
Please apply strictly according to the label instruction ,increase the concentration cannot achieve the better effectiveness .
Some common misunderstanding need to correct :
一、The longer the effect period, the better
Most people think that pesticides, especially insecticides, are better than the better period. This is a wrong understanding. Such pesticides are more likely to induce resistance. The above, but in the process of slowing down the effect, from other places, a group of pests are migrated from other places. The concentration of the residual drug concentration on the crops can no longer kill foreign pests. After that, the offspring will soon produce resistance. It can also be understood: residual pesticides induce them to produce resistance.
二、The greater the pesticide concentration, the better the effect
On the issue of the concentration of the medicinal solution, many farmers’ friends think that the greater the pesticide concentration, the better the effect. This is a wrong understanding, and not to mention the impact of the potential drug damage of the dosage on the crops. In terms of, it is also not desirable. The reason is similar to the previous, that is, no matter how strong the pharmaceutical agent is, there are also harmful creatures with leakage nets. Then their descendants have risen rapidly.
Post time: Nov-01-2022
