Common pests of Clerodendrum thomsoniae and their control methods

Leaf Beetle

Pest symptoms

Leaf beetles are generally more common in tropical regions. But this kind of pest also occurs in our country in summer. Everyone should also be careful and preventive. They often gnaw on the leaves, leaving them unrecognizable and destroying the ornamental effect of the plant.

Prevention and treatment methods

Artificial capture and the addition of pesticides are two-pronged prevention and control measures. Once leaf beetles are found, they should be captured and killed immediately. Then spray the plants with pesticides to prevent the larvae from continuing to grow and harm the plants. The pesticide can be sprayed with 3000 times diluted 2.5% dimethoate.

Ligustrum moth

Pest symptoms

The spiny moth, also known as the starworm, particularly likes to suck young leaves. The tender branches of the plants are where they live, and they often gnaw at the plants to the point of poor growth.

Prevention and treatment methods

During the peak period of larvae, spray 1200 times diluted 80% DDT EC, 1000 times diluted 50% phoxim EC, 1000 times diluted 50% malathion EC, 1000 times diluted 25% phosmet EC, 1500 times diluted 25% Acumin EC, 3000 times diluted 5% Levofloxacin EC.

Scale insects

Pest symptoms

Adults and nymphs suck sap from petioles, leaf bases, and leaf surfaces, producing yellow spots. Scale insects can easily reproduce and cause harm in a poorly ventilated environment.

Prevention and treatment methods

Ensure ventilation. Once scale insects occur, spray 1000 times diluted 25% cypermethrin wettable powder or 800-1000 times diluted 40% cypermethrin emulsifiable concentrate in time, once every 7 days for 2-3 times in a row.

Whitefly

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 sprayed with 1000 to 1500 times diluted 40% oxydemeton-methyl.