How to identify and control Lagerstroemia indica? Harmful characteristics of Lagerstroemia indica

1. The female adult Lagerstroemia indica is oval and flat, with a body length of about 2mm-3mm.

How to identify and control Lagerstroemia indica? Harmful characteristics of Lagerstroemia indica

1. The female adult Lagerstroemia indica is oval and flat, with a body length of about 2mm-3mm. When the female matures, it has a white velvet shell. Male adults are shorter than females, only 0.3mm long, and their wings can reach 1mm long. The male pupa is purplish brown with a white velvet bag. 2. Clean up the branches with serious pests and diseases and in the wintering state. In addition to cleaning and pruning branches in winter, chemical agents can also be used for prevention and control. In early spring, when horticultural plants are not germinated, Pomei 3-5 degree stone sulfur mixture can be sprayed.

First, how to identify and control Lagerstroemia indica?

1, Lagerstroemia indica, also known as pomegranate peel, occurs all over the country, mainly in North China and Central China. The female adult in Lagerstroemia indica is oval, flat and about 2-3 mm long, and the female will have a white velvet shell when it matures. Male adults have shorter body length than females, only 0.3mm, and their wings can reach1mm. The male pupa is purple-brown, round and long, covered with a bag-like white cocoon. Female adults usually gather at the base of the main vein or branch of young leaves.

2. Gardening plants should be pruned in time in winter, and branches with serious pests and diseases and overwintering insects should be cleaned up. If the situation of pests and diseases is serious, in addition to cleaning and pruning branches in winter, chemical agents should be used for prevention and control. In early spring, Pomei 3-5 degree sulfur mixture should be sprayed when horticultural plants are not budding, and 40% sulfur EC 1500 times solution should be sprayed when plants grow and insects hatch.

Second, the harm characteristics of Lagerstroemia indica

1, insect aggregation

After hatching, the larvae will land on the tender leaves and buds of plants and suck the juice. Lagerstroemia indica larvae usually gather together and spread all over the surface of plant shoots, and there will be several or even more than a dozen Lagerstroemia indica on the branches seriously affected by pests and diseases.

2. Coal stain

The excrement discharged after eating Lagerstroemia indica is a kind of honey dew with rich nutrition, which can provide a good culture medium for coal-polluted bacteria. Coal-polluted bacteria will multiply by Lagerstroemia indica excrement, so plants will also produce sooty blotch spots, and black powder will spread on the surfaces of diseased branches and nearby branches of plants, which may also cause other diseases.

Step 3 be fertile

Lagerstroemia indica is very fertile and lays a lot of eggs. 1 female Lagerstroemia indica adults can produce 1 13-309 worms, and 1 year can produce three generations, even if the survival rate of each batch is 40%, 1 overwintering females is 6544.