Common diseases of velvet needles and their prevention and control methods

Common diseases of velvet needles: black rot

Symptoms of velvet black rot: the leaves close to the soil turn black, and in severe cases, the stems will also turn black.

Causes of velvet needle black rot: high temperature in summer, lack of timely water and ventilation, reduced plant resistance, leading to massive reproduction of fungi.

Prevention and control methods for velvet needle black rot: enhance ventilation in summer, keep the potting soil dry, reduce watering, and do not apply fertilizer. After discovering black rot, you can cut off the head and use cuttings. Remember, do not leave any areas with black rot.

Common diseases of velvet needles: water rust

Symptoms of velvet needle water rust: The leaves of the velvet needle close to the soil in the pot turn yellow at first, as if they are rusted, and then become more and more withered, showing signs of withering. The hairs on the leaves become rusty.

Causes of needle rust: poor ventilation, high temperature, aggregation of fungal spores, and rust infection.

Methods for preventing and controlling needle rust disease: increase ventilation, lower temperature and control water.

If leaves wilt, turn yellow, fall off, or roots rot, the only options are beheading or leaf cuttings. If the situation is not very serious, you can cut off the diseased area first, apply carbendazim, change the pot soil and start maintenance again.

Common diseases of velvet needles: powdery mildew

Symptoms of powdery mildew of velvet needles: Powdery mildew occurs on leaves, tender stems and other parts. In the early stage, it appears as small irregular yellow-green spots with unclear edges. Then the lesions continued to expand, white powdery spots appeared on the surface, and finally countless black spots grew there. The infected area turns gray, covering the surface in a continuous patch, with unclear edges, and is dirty white or light grayish white. When the damage is severe, the leaves shrink and become smaller, and the young shoots become twisted and deformed.

Causes of powdery mildew of velvet needles: vigorous growth of plants or poor growth of plants, decreased resistance and rapid bacterial growth.

Prevention and control methods for powdery mildew of velvet needles: Use 1000 times diluted white wine (alcohol content 35%), spray once every 3 to 6 days, spray 3 to 6 times continuously, and rinse the leaves until there is no white powder.