Common pests of the dwarf ...

Common pests of the dwarf dwarf tree: scale insects

Pest symptoms

The damage is widespread. It sucks the juice from stems and leaves, causing poor plant growth and even inducing sooty mold, which causes large-scale damage to the leaves. Its peak period is earlier than that of red spider mites, and it often reproduces in large numbers in early spring.

Prevention and treatment methods

When the number is small, you can use a brush to remove it. In addition, you can also use 800-1000 times diluted Supusha for spraying. Mixing a certain amount of furadan into the culture soil has a preventive effect, but the efficacy is only three months.

Common pests of the dwarf dwarf tree: red spider mites

Pest symptoms

The leaves of the Acanthus rotundus are damaged by red spider mites, 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.

The main reasons for the breeding of pests in the jasmine tree are high temperature and humidity, poor ventilation, and waterlogging in the pot soil. If you want to kill the insect eggs in the bud, you can pay more attention to adjusting the growth environment of the Pieris japonica in summer during daily maintenance. For example, provide appropriate shade, enhance ventilation, control water in potting soil, disinfect soil, etc.