Pest control of nail orchid

Sclerotium rolfsii

Symptoms

The disease mostly occurs during the rainy season. When the disease first occurs, white mycelium will appear on the leaves, and as the disease gradually worsens, it will cause root and stem rot.

Prevention and treatment methods

Repot and change the soil. White rot is mostly caused by bacterial infection in the soil, so the contaminated soil should be removed in time and thrown away or disinfected directly. Sprinkle lime on the soil. Plants with more serious diseases should be burned directly. After changing the soil, pay attention to ventilation and light transmission of the plants, and pay attention to the drainage of the potting soil.

anthrax

Symptoms

It occurs all year round, with the highest incidence occurring during hot and rainy seasons. At first, brown spots will appear on the tips of the leaves and gradually extend to the rhizomes. Then the spots will gradually expand and increase in number, and many small black spots will appear. In severe cases, the entire plant will die.

Prevention and treatment methods

For spraying, use 800-1500 times diluted thiophanate-methyl during the disease period, spray once every 7-10 days, and then you can use Bordeaux mixture as an auxiliary, spray once every half a month, and spray continuously for 3-5 times.

Scale insects

Symptoms

This disease and insect pest will appear more obviously, with many small white insects appearing on the leaves. They reproduce fastest in an environment with high temperature, humidity and poor air circulation. Too many insects will directly lead to the death of the plant.

Prevention and treatment methods

In the early stage of the disease, it can be directly removed by manual brushing or flushing with clean water.

In serious cases, spray with 1% omethoate once every 7 to 10 days, and spray 3 to 5 times.