What are the common control methods for Schizonepeta diseases?
Schizonepeta (Schizonepeta tenuifolia) is a plant that serves both as food and medicine. Its cultivation prospects and benefits are considerable, and thanks to its environmental adaptability, it can grow all over the country, so it is now cultivated in every region nationwide. However, during cultivation, attention must be paid to daily management, especially disease control work. Follow along with the editor below to learn about Schizonepeta disease control techniques.
1. Root rot
This is a fungal disease that generally occurs during the high-temperature, rainy period from July to August, when the environment makes it extremely easy for pathogenic bacteria to multiply. When the disease strikes, it starts from the root system, the aboveground part rapidly wilts, and the roots and root crown turn black until they rot.
Control methods: During the hot, rainy season, pay attention to drainage and waterlogging prevention measures. Before sowing, while preparing the land, broadcast 1 kg of dexon per mu to disinfect and sterilize the soil and eliminate pathogenic fungi in the soil. In the early stage of the disease, spray a 200-fold dilution of quintozene to irrigate the roots for control.
2. Damping-off
It generally occurs during the low-temperature, rainy period from May to June, when the temperature is relatively low and soil moisture is relatively low. It mainly harms seedlings. When the disease strikes, brown water-soaked small black spots appear on the stems of the seedlings, gradually expanding into large lesions, and finally turning brown. The stem base becomes thin, causing the seedlings to lodge and die.
Control methods: Choose excellent varieties with strong disease resistance for planting, strengthen field management, do a good job of drainage measures, and in low-temperature, rainy weather, spray Bordeaux mixture in advance for prevention. When the disease occurs, spray thiophanate-methyl for control.
3. Stem blight
This disease mainly harms the stems, leaves, flower spikes and other parts. After the leaves are affected, water-soaked lesions appear, as if they have been scalded; after the petioles are affected, water-soaked lesions also appear; after the stems are affected, water-soaked lesions first appear and gradually expand into stem-girdling blight spots, causing the upper stems and leaves to wilt and die and preventing normal flowering.
Control methods: When the disease occurs, promptly spray carbendazim or thiophanate-methyl solution for control, spraying once every week for 3 consecutive times, with good results.
4. Black spot
It mainly harms the leaves. When the disease occurs, irregular brown spots appear on the leaves, gradually expand, and finally cause the leaves to turn black and die. It can also spread to the stems, causing the stems to turn brown and become thin, and finally droop and break.
Control methods: Strengthen fertilizer and water management, increase the application of phosphorus and potassium fertilizers, improve disease resistance, and handle promptly after the disease occurs.
The above is an introduction to common control methods for Schizonepeta diseases. We hope it can help you. To learn more related knowledge, please stay tuned to us.