Common Pests of Snapdragon and Their Control Methods

Common Pests of Snapdragon: Aphids

Pest symptoms

They usually concentrate on sucking sap from tender buds, leaves and branches, causing the affected parts of the plant to shrink and deform. Aphids also secrete honeydew that contaminates the plants and induces diseases such as sooty mold.

Prevention and treatment methods

You can use 600-800 times diluted Wanling or 800-1000 times diluted 25% fish vine oil Suposha for spraying. Suposha is a broad-spectrum organophosphorus insecticide with contact and stomach poison effects and strong penetration. It can penetrate into plant tissues and has a good control effect on chewing and piercing-sucking mouthparts pests. Spray once a week for 2-3 times in a row.

Common Pests of Snapdragon: Red Spider

Pest symptoms

When snapdragons are harmed by red spider mites, their leaves fade and their chlorophyll is destroyed. Dense small yellow spots and yellow spots appear on the surface, and they gradually shrink, turn yellow, and wither. In severe cases, they fall off and lose their ornamental value.

Prevention and treatment methods

Red spider mites often hide on the back of branches, leaves or in densely foliaged areas. They can be concealed by nets and easily captured manually.

If chemical agents are used for treatment, you can use 20% trichloronate emulsion, add 800-1000 times water, make a solution for spraying. This drug has a good killing effect on adults, nymphs and eggs. You can also add 1000-1500 times the amount of DDT emulsion into water to make a solution for spraying.

Common Pests of Snapdragon: Whiteflies

Pest symptoms

Whiteflies suck plant sap, which can cause leaves to fade, curl, and shrink. They also often become vectors of various toxins and cause other diseases.

Prevention and treatment methods

It can be killed by spraying with 0.01% solution of dimethoate.

Common Pests of Snapdragon: Thrips

Pest symptoms

The adults or nymphs live on plants and feed on young shoots, tender leaves, flowers and young fruits. The young leaves curl up after being eaten, and the buds and flowers wilt after being damaged.

Prevention and treatment methods

In the early stage of the disease, you can spray 25% derris or 40% dimethoate at 400-500 times dilution.