What are the common pest and disease control methods for goldenrod?
Goldenrod is a widely used Chinese herbal medicine. It is rich in flavonoid components and has excellent anti-cancer properties. It also has the effects of clearing heat and detoxifying, reducing inflammation and swelling, and can treat various inflammations such as bronchitis, tonsillitis, and pharyngitis. As wild sources are increasingly declining, artificial cultivation has become a trend, but pests and diseases are important factors affecting its growth during cultivation. So what pests and diseases does goldenrod have? And how should they be controlled? Let's take a look.
1. Root rot
It is a disease that harms the root system and is prone to occur in hot, humid, and muggy weather. When the disease occurs, water-soaked lesions appear on the root system, gradually turning brown and then black until they rot. The aboveground stems and leaves will also slowly wither and die, making the damage extremely severe.
Control methods: Choose plots with good ventilation and good drainage for planting, which can reduce the incidence of this disease. When the disease occurs, pull out the diseased plants and sprinkle lime powder on the diseased holes for disinfection, or use carbendazim or thiophanate-methyl as a root drench for control.
2. Mosaic disease
This is a viral disease. It can be spread by pests such as aphids, and mainly harms the leaves or flowers of the plant. When the plant is affected, the leaves shrink and twist, becoming mosaic-like, and the plant gradually becomes stunted.
Control methods: To control this disease, aphids must first be eliminated to prevent the spread of the disease. When planting, choose virus-free seeds, or carry out comprehensive disinfection treatment before planting. Applying imidacloprid during the seedling stage or peak growth period can effectively prevent this disease.
3. Rust disease
This is a fungal disease. When it occurs, rust-colored spots grow on the leaves and gradually spread. In the later stage, yellow powdery substances appear on the lesions. These are the pathogen's pycnidia, which spread with the wind.
Control methods: Strengthen fertilizer and water management, apply more phosphorus and potassium fertilizers, and improve disease resistance. Before transplanting and after the green-up stage, spray triadimefon to prevent this disease.
4. Pests
The pests of goldenrod include underground pests such as white grubs, cutworms, and mole crickets, which gnaw on the plant's roots or seedlings. If seedlings suffer pest damage, they are very likely to die. If the root system of mature plants is severely damaged, it can also cause the plants to wither and die.
Control methods: Manual capture can be used, or pesticides such as trichlorfon and dichlorvos can be sprayed for control.
The above is an introduction to the common pest and disease control methods for goldenrod. We hope it can help you. To learn more related knowledge, please stay tuned to us.