# Gufeng plan # cotton bollworm, belongs to the lepidoptera pest, a relatively common pest in the peanut planting process, it is widely distributed, basically in China's north and south peanut planting areas have occurred, for peanuts are more harmful, if not timely prevention, the yield and quality of peanuts will have an impact.
Cotton bollworm is generally harmful to peanuts in the larval stage, starting from the 2nd instar to nibble on the leaves of peanuts, and when it is about 6 years old, it enters the binge eating period, and the peanut leaves will be eaten in large quantities, if it is in the flowering period, the flowers will also be eaten by cotton bollworms. In addition, the harm rate of cotton bollworm is relatively not slow, after this plant is eaten, it is transferred to the next plant to continue to harm, so it is necessary to attract the attention of peanut growers.
At present, a combination of prevention and control methods are used for peanut cotton bollworms to achieve the best results (many farmers do not attach much importance to preventive measures and hope to combine them).
First of all, there are two preventive measures, the first is to choose a variety with strong insect resistance, for the harm of cotton bollworm, there will be a certain reduction, the second is to use the method of deep ploughing after the harvest of stubble crops, destroy the survival site of cotton bollworm eggs and pupae, reduce the number of insect pests in the field, plant one season a year or plant multiple crops a year.
Speaking of control measures, control measures can be divided into two types: biological control and chemical control.
There are two main types of biological control:
1. Predators
There are many natural enemies of cotton bollworms, and conditional natural enemies can be released to prevent and control, such as red-eyed bees, bees, jumping wasps, wasps, etc., suitable for large-scale growers, if it is a small area of retail households may not be suitable, we decide according to their own situation.
2. Booby trap
The use of cotton bollworm adult phototropism, to trap the cotton bollworm adult, according to observation, cotton bollworm spawning time, generally at dusk and night, so choose this time period, the effect is better, the method can use black light or special oatments for booby traps.
Chemical Control:
The use of pesticides for control is the way of many farmers, there are many agents on the market for cotton bollworm, due to different areas, the severity of the occurrence of cotton bollworm and drug resistance is different, there may be the same kind of agent in different places, the effect of prevention is very different, so, according to the local specific conditions to choose the appropriate agent, the available agents are: high-efficiency cypermethrin, methyl vitamin salt, propyl bromophos, amidovir, cypermethrin, etc., in addition to the above single agents, can also use compound agents, such as high chlorine octylthion, cyanogen chloride Octyl thion, propyl bromide octyl thion, octyl thiophos, octyl thiophane, etc.
For peanut pests, if the local occurrence is more serious, the prevention effect is not good, and it can be sprayed multiple times according to the actual situation.
The above is the introduction of peanut cotton bollworm and the control method, I hope that after reading it, you can gain something.
Regarding this, if you have other problems or better ways to prevent and treat, please leave a message in the comments below, and discuss and learn together.