What are the control methods for pests and diseases of Achyranthes bidentata?
Achyranthes bidentata is a perennial herbaceous medicinal plant with extremely high medicinal value and wide application. It is grown over a wide range, and its growth directly determines its quality and returns. Therefore, pest and disease control work is extremely important during cultivation. Let's take a look at its pest and disease control work together below.
1. Root rot
Root rot, as the name suggests, is a disease that harms the root system of the plant. When it occurs, the above-ground plant shows no obvious changes, the root system turns brown, becomes water-soaked, and gradually rots, and the above-ground plant also begins to gradually wither and die.
Control method: The preventive measures for this disease are mainly to reduce field humidity and pay attention to drainage during the rainy season. When the disease occurs, it can be controlled by irrigating the planting holes with Bordeaux mixture and lime milk, which has a good effect. However, once rot occurs in the later stage, there is no cure, and the plants can only be pulled out and taken out of the field, and the diseased holes must be disinfected.
2. Root nematode disease
Like root rot, this is also a disease that harms the root system. Nematodes parasitize the root system and produce tumor-like galls, causing the root system to lose its function of absorbing and transporting nutrients, seriously affecting yield and quality. In severe cases, the plant will wither and die due to lack of nutrients and water.
Control method: Reasonable crop rotation to reduce nematode damage. Before planting, evenly spread methyl isothiophos on the soil, and combine it with plowing to turn it into the soil. The disinfection and pest-killing effect is good.
3. Leaf spot disease
Leaf spot disease is a bacterial disease that mainly harms the leaves and petioles. When the petioles are affected, many water-soaked round or polygonal lesions appear, which gradually expand in the later stage, and the lesions turn dark brown. The petioles also wither and shrink, and in severe cases cause large-area leaf drop.
Control method: Remove diseased leaves in time to prevent further spread of the pathogen. When a large area of the plant is infected, spray Lvdebao suspension concentrate or Bordeaux mixture for control, once every 10 days, for 2-3 consecutive times.
4. Silver-striped noctuid
The silver-striped noctuid is an omnivorous pest. If not controlled in time, it will eat all the young and tender parts of the plant clean, such as young buds, young leaves, and flower buds, causing the plant's growth to be hindered and the leaves to curl and wither.
Control method: During the larval stage, spray trichlorfon or phoxim for control, once every 10-15 days, for 2-3 consecutive times.
The above is an introduction to the control methods for pests and diseases of Achyranthes bidentata. We hope it can help you. To learn more related knowledge, please stay tuned to us.