Common diseases and control methods of plush needle

Common diseases of Velveteen: black rot

The symptoms of black rot of velveteen needle: the leaves near the basin soil turn black, and the stems and stems turn black in serious cases.

The causes of black rot: high temperature in summer, no timely control of water and ventilation, decreased plant resistance, resulting in a large number of fungi.

Prevention and control methods: enhance ventilation in summer, keep basin soil dry, reduce watering, do not apply fertilizer. After discovering the black rot, you can cut off the head and cut. Remember, don't leave any places with black rot.

Common diseases of plush needle: water rust

The symptoms of water rust of fluff needle: the leaves near the basin soil of fluff needle turn yellow at the beginning, like rust, the longer and more residual, with signs of withering. The villi on the leaves became rusty.

The causes of water rust: poor ventilation, high temperature, fungal spore aggregation, resulting in rust infection.

Prevention and control methods: strengthen ventilation, reduce temperature and control water.

If there are withered leaves, yellow leaves, rotten roots, etc., we can only cut off the head or insert the leaves. If it is not very serious, we can cut off the disease, apply carbendazim, change the basin soil and maintain again.

Common diseases of needle: Powdery Mildew

Symptoms of powdery mildew: powdery mildew occurs in leaves, young stems and other parts, with irregular yellow-green spots at the initial stage and no obvious edge. Subsequently, the disease spots continued to expand, with white spots on the surface, and finally countless black spots. The infected part turns gray, covering its surface continuously, the edge is not clear, showing dirty white or light gray white. When the damage is serious, the leaf shrinks and becomes small, and the tender tip is twisted and deformed.

The causes of powdery mildew: the plants are too long or not growing well, the resistance is decreased, and the bacteria grow rapidly.

Prevention and control method of powdery mildew: 1000 times liquor (35% alcohol content) can be used, once every 3 to 6 days, three to six times continuously, washing leaves until there is no powdery mildew.