What are the prevention and treatment methods for Zantedeschia leaf spot disease
Below is an introduction to the prevention and treatment methods for Zantedeschia leaf spot disease for netizens, let's take a look together.
What are the prevention and treatment methods for Zantedeschia leaf spot disease
Zantedeschia is native to southern Africa and has been widely cultivated worldwide after continuous variety improvement. Zantedeschia is commonly used as a cut flower material, with rich colors and unique flower shapes, making it deeply loved by people. Zantedeschia has a good growth habit and is easy to grow, but if not properly managed, it is prone to diseases. Common diseases of Zantedeschia include leaf spot disease. How to prevent and treat leaf spot disease, today I will teach you some methods.
Symptoms of Zantedeschia leaf spot disease
Infected leaves develop light brown to yellowish-brown spots, most of which are round, oval, or irregular in shape. A few diseases have faint concentric rings. In the later stages of the disease, a large number of black spot-like mildew appear in the center of the disease, which is the conidia of the pathogen.
Causal agent and current situation of Zantedeschia leaf spot disease
Leaf spot disease of Zantedeschia is a sexual disease caused by cross-infection with Streptomyces. The pathogen overwinters in the diseased leaf debris of Zantedeschia and is spread by air currents. In summer, when the temperature and humidity in the shaded greenhouse are high, the disease spreads rapidly, causing severe damage from July to October each year. After entering autumn, the disease gradually decreases and stops developing. However, this disease can occur in greenhouses for many years. When the greenhouse temperature is between 18-20°C, the disease will continue to develop and spread, and these diseased plants will become a source of infection for healthy plants. The disease is common in poor ventilation and maintenance conditions.
Prevention and treatment methods for Zantedeschia leaf spot disease
1. Strengthen cultivation management. According to the growth habits of Zantedeschia, it should be placed in a shady place during the growing season to make it grow vigorously and reduce the occurrence of diseases. If exposed to direct sunlight, it will weaken the plant's growth potential, favoring the occurrence of diseases. In winter, Zantedeschia should be placed in a northern greenhouse, fertilized reasonably, promoting vigorous plant growth, and improving disease resistance.
2. Timely infection source control. During the growing season, promptly find diseased and residual leaves, before entering the greenhouse in winter, thoroughly remove the diseased residues, centrally process them, keep the soil surface clean, and reduce the source of infection.
3. Chemical control: In gardens where the disease is common and severe, spray 50% carbendazim wettable powder at 1000 times every 15 days, usually for 3 consecutive sprays.
That's it. When planting Zantedeschia, several points need to be noted: provide sufficient water, the soil should have good drainage, the temperature should not be too high, and ventilation should be good. Zantedeschia is not cold-tolerant, so the growing environment should maintain a certain humidity.
The methods for preventing and treating Zantedeschia leaf spot disease introduced in this article are for reference and suggestion.