Diseases of补血草 and Their Control
As a plant with both ornamental and medicinal values, 补血草 is widely popular in horticultural planting. However, it often encounters diseases during its growth, which directly affects the plant's health and ornamental value. This article will systematically analyze the common disease characteristics of 补血草 and provide scientific control measures.
Main Disease Types of 补血草
Analysis of Viral Disease Hazards
Viral diseases are among the most challenging diseases for 补血草. Infected plants show significant dwarfing characteristics, with new leaves appearing malformed and shriveled, and the leaf area can be reduced to 50% of normal plants. The characteristic of汁液 transmission makes it a rapidly spreading risk, requiring special vigilance.
Classification of Fungal Diseases
Grey Mould Infection by Botrytis cinerea
This pathogen primarily infects the stems of the plant, initially forming water-soaked lesions at the base of the petioles, which later develop into gray-brown rot. In humid conditions, a visible gray mold layer can be seen, and in severe cases, the entire plant can collapse.
Leaf Spot Disease by Cercospora
Leaves develop round or oval brown spots with a yellow halo around the edges. As the condition progresses, the spots merge, causing large areas of the leaves to turn yellow, significantly reducing the photosynthetic capacity.
Building a Comprehensive Control System
Preventive Management Measures
Choosing virus-free seedlings is key to preventing viral diseases. Soaking seeds in a 10% trisodium phosphate solution for 20 minutes before sowing can effectively inactivate the virus. The planting medium must be sterilized with high-temperature steam, and a coconut coir and perlite mix is recommended.
Accurate Medication Program
Alternately use oligosporin (500 times liquid) and ningnanmycin (800 times liquid) at the early stage of the disease, spraying once a week for three consecutive weeks. For fungal diseases, a 50% dimethomorph water-dispersible granule formulation at 2000 times liquid can be used, combined with seaweed extract foliar fertilizer to enhance resistance.
Environmental Control Technology
Maintain a day-night temperature difference of 8-10°C and relative humidity below 60%. Use a drip irrigation system to supply water accurately and avoid leaf surface condensation. Maintain a supplemental lighting intensity of 3000-4000 lux per square meter, with a daily lighting time of at least 10 hours.
By establishing a management system that integrates prevention, monitoring, and control, the disease resistance of 补血草 can be significantly improved. Regular health checks on the plants, combined with biological and physical control methods, can effectively control disease spread and reduce the impact of chemical agents on the ecological environment.