Narcissus Common Diseases
As an important ornamental flower from winter to spring, narcissus often faces disease threats during cultivation. This article systematically sorts out the characteristics and key points of prevention and treatment for four typical diseases, using scientific control methods to help growers cultivate healthy plants and extend the ornamental value of the flowering period.
Narcissus Disease Diagnosis and Control System
Grey Mold Comprehensive Control
The pathogen is transmitted through the air and easily breaks out in high humidity environments. In addition to root rot and mold layer characteristics, abnormal flower buds are typical symptoms. Suggestions: ① Keep the humidity below 60% during storage, using bamboo mesh layers for storage; ② Soak bulbs in warm water at 50°C for 30 minutes before planting, followed by a second disinfection with 50% carbendazim 800 times liquid.
Large Brown Spot Management Plan
Highly prevalent during the rainy season, the lesion diameter can reach over 1 cm. Key points for prevention and treatment: ① The crop rotation interval should be more than 2 years; ② Spray 1:1:100 Bordeaux mixture at the beginning of the disease, 7 days/time for 3 consecutive times; ③ Increase application of phosphorus and potassium fertilizers to thicken the leaf cuticle layer.
Nematode Disease Eradication Strategy
Nematodes can survive in the soil for up to 3 years. Key points for prevention and treatment: ① Soak bulbs in hot water at 55°C for 10 minutes before planting; ② Use 10% aldicarb granules (3 kg/mu) mixed with soil in the affected area; ③ Companion planting with insect-repelling plants like marigolds to form a ecological barrier.
Yellow Strip Spot Disease Systematic Prevention
A viral disease, with aphids as the main vector of transmission. Countermeasures: ① Set up yellow sticky traps to monitor insect population density; ② Regularly spray 10% imidacloprid 2000 times liquid; ③ Immediately remove infected plants and spray 5% mycotoxin clear 400 times liquid to protect surrounding plants.
By establishing a management system that integrates preventive disinfection, environmental control, and biological control, the incidence of narcissus diseases can be effectively controlled. It is recommended that growers check the back of the leaves monthly, strengthen drainage management during the rainy season, maintain proper spacing for ventilation, which can maximize the maintenance of plant health.