It can be sprayed with 2.5% deltamethrin 3000 times or pyrethroid 4000 times.

Twenty-eight-star ladybug:

Coccinella octodentata is a typical harmful ladybug that harms vegetables. It is a general term for Harmful Ladybug and Harmful Ladybug.

The main products are eggplant and potatoes.

Damage characteristics:

The adults and larvae of ladybug septempunctata peel off mesophyll on the back of leaves, leaving only epidermis, forming many irregular and translucent plants to die. fruit

The bitten area often breaks and the tissue becomes stiff; Rough, bitter, inedible, and even lose its commodity. Only leaves are left in the damaged crops.

The leaves with severe epidermis are transparent and brown and withered, leaving only veins on the back of the leaves. There are also wavy food marks on stems and fruits.

Integrated control of agricultural control;

Artificial killing of adults and larvae, artificial egg picking. Strike plants with suspended animation, collect and destroy them. Manually picking eggs before larvae hatch,

Centralized treatment to reduce the number of pests.

Biological control:

Spraying biological agents such as Bacillus thuringiensis and polysaccharide to protect natural enemies.

Physical prevention and control:

According to its tropism, the purpose of centralized killing is achieved by using insecticidal lamps or planting to lure crops. For example, planting nightshade to seduce people.

Chemical prevention and control:

Seize the opportunity to use drugs in the undivided or larval stage, and the control effect is good. 2.55 deltamethrin 2500 times solution can be used.

Spray; Spraying 2.5% fenpropathrin EC with 3000 times solution; 2% avermectin wettable powder is diluted and sprayed with 20-30g of water per mu; ?

10% imidacloprid wettable powder 10 ~ 20g diluted with water per mu and sprayed. Pay attention to spraying the leaves on both sides.