The two-spotted pods are called white spiders and they mainly damage apples, pears and legumes. Before 1998, two-spotted spider mites were only sporadic in peanuts in our city. Investigations took place between July and August 1999. The pests were widespread in 18 towns and cities in our city and were seriously affected. In the event of damage, the rate of plutonium piercing is more than 95%, and there are 20 to 30 pupae in single leaves, which has a great impact on peanut production.
1 Symptoms and Occurrence Characteristics
The two-leaf pupae, the pupae and the young pupae can all absorb the sap of the leaves of the peanuts. After the leaves are damaged, they are initially stained with small green spots and gradually enlarge the contiguous leaves. In severe cases, the whole leaves are pale, the coke blights fall off early, and the local peat plants die. The main wintering sites of the two-spotted spider mites are the rhizosphere of the root weeds such as earth seams and Prunella vulgaris. In spring, when the average temperature reaches 6 to 7°C in March, spawning is started. Overwintering adult larvae concentrates on the host in the early spring (mainly perennial weeds) for breeding damage. After the emergence of crops, they will be transferred to harm. The period from the middle of June to the beginning of August is the period of damage. In summer, the density of insect population can naturally decline when it encounters rain. If it is still dry afterwards, it can continue to cause damage.
2 Prevention and control measures
2.1 Agricultural control Deep-turning land will turn the surface of the soil overwintering into deeper layers; death will occur in the rotation; annual weeds should be eradicated in winter and spring.
2.1 Chemical control should grasp the appropriate period of control and control the base of the initial stage of occurrence. The control agent can be sprayed with 73% Kotel EC 2000-4000 times spray or 42% Ethanol 4000-5000 times spray, which has special effects on Rugao and Chengyu and killing eggs.
1 Symptoms and Occurrence Characteristics
The two-leaf pupae, the pupae and the young pupae can all absorb the sap of the leaves of the peanuts. After the leaves are damaged, they are initially stained with small green spots and gradually enlarge the contiguous leaves. In severe cases, the whole leaves are pale, the coke blights fall off early, and the local peat plants die. The main wintering sites of the two-spotted spider mites are the rhizosphere of the root weeds such as earth seams and Prunella vulgaris. In spring, when the average temperature reaches 6 to 7°C in March, spawning is started. Overwintering adult larvae concentrates on the host in the early spring (mainly perennial weeds) for breeding damage. After the emergence of crops, they will be transferred to harm. The period from the middle of June to the beginning of August is the period of damage. In summer, the density of insect population can naturally decline when it encounters rain. If it is still dry afterwards, it can continue to cause damage.
2 Prevention and control measures
2.1 Agricultural control Deep-turning land will turn the surface of the soil overwintering into deeper layers; death will occur in the rotation; annual weeds should be eradicated in winter and spring.
2.1 Chemical control should grasp the appropriate period of control and control the base of the initial stage of occurrence. The control agent can be sprayed with 73% Kotel EC 2000-4000 times spray or 42% Ethanol 4000-5000 times spray, which has special effects on Rugao and Chengyu and killing eggs.
Head Massage,Head Massage Spa,Best Head Massager,Relaxing Head Massage
Shenzhen Jie Zhong Lian Investment Co., Ltd. , https://www.szmeizonscares.com