Causes of Root Rot in Angelica sinensis and Control Methods
Angelica sinensis is a common traditional Chinese medicinal herb with effects and functions such as tonifying blood and promoting blood circulation, regulating menstruation and relieving pain, and moistening the intestines to relieve constipation. Its market demand is relatively large, so more and more people are growing it, but root rot is extremely prone to occur during the cultivation of Angelica sinensis. So what causes root rot in Angelica sinensis? And how should it be prevented and controlled? Let's find out together.
I. Causes of Root Rot in Angelica sinensis
1. Diseases are extremely prone to occur under high temperature and high humidity environments. High temperature is favorable for pathogen reproduction, while high humidity is unfavorable for root development. In rainy areas in summer and autumn, and in low-lying fields with poor drainage, root rot is extremely prone to occur.
2. Continuous cropping on the same plot is also extremely likely to lead to severe occurrence of diseases.
3. When there are many underground pests such as white grubs and wireworms, the root wounds of Angelica sinensis will also increase, giving pathogens an opportunity to invade.
4. Diseased plant residues and pathogen-bearing soil can also be spread through water flow, humans, livestock, farm tools, and undecomposed farmyard manure.
II. Control Methods
1. Field selection and seed selection
It is best to choose sandy soil with good drainage and strong permeability for cultivation, carry out reasonable crop rotation, and it is recommended to disinfect the soil before transplanting. Choose robust and disease-free seedlings for transplanting, and it is best to treat the seeds with New High-Fat Film.
2. Strengthen field management
Appropriately increasing the application of phosphorus and potassium fertilizers can enhance the disease resistance of the plants. At the same time, weed control through intertillage can also reduce the occurrence of diseases. If the climate is dry, water timely to preserve soil moisture. After slow recovery, when the leaves unfold, spray foliar fertilizer and plant growth regulators to increase photosynthetic efficiency, synthesize photosynthetic products, transport nutrients to the root system, improve the nutrient conversion rate and soil-loosening capacity, and promote root expansion.
3. Chemical control
After diseased plants are found, they should be removed promptly and taken out of the field to be burned, then a layer of lime powder should be spread in the diseased holes to eliminate pathogens and prevent their spread. Then spray with thiophanate-methyl plus an appropriate amount of New High-Fat Film to prevent the disease from spreading. If the disease occurs on a large area, pesticide spraying must be carried out promptly to prevent large-scale yield reduction.
The above is an introduction to the causes of root rot in Angelica sinensis and the control methods. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.