Control of Lilium Leaf Blight
Symptoms: round or oval disease spots appear on the leaves, varying in size and more than 2mm in length. Light yellow to light brown. In some varieties, the spot is light brown, surrounded by a clear reddish-purple edge, and in wet conditions, the spot is quickly covered with gray mold. When the disease spot is dry, it becomes thin, fragile, transparent and generally grayish white. When serious, the whole leaf withered and died. When the stem is infected, it is rotten and broken from the infection place, and the bud turns brown and rotten. When the flowers are brown and moist, they quickly turn into a sticky mass and are covered with a gray mildew layer. When the young plants are infected, the growing point usually dies. But the plant can grow again in summer.
Pathogen: the pathogen is Botrytiselliptica (Berkeley) Cooke. The conidia are oval. Sometimes Botrytis cinerea (BotrytiscinereaPers.) can also damage lilies, but it mainly causes flower rot.
Route of infection: the pathogen overwinters with hyphae or sclerotia on the remnants of fallen diseased tissue, and produces conidia infection in the following year, which can be infected repeatedly; it is easy to occur when the greenhouse is too wet. When the plant is too dense, the disease is serious, and the disease is serious when nitrogen fertilizer is applied.
Prevention and control methods:
The main results are as follows: 1. In the autumn of horticulture, the aboveground parts of the plants cultivated outdoors are removed and destroyed, and the diseased leaves are removed in the first disease to reduce the source of infection.
2. The greenhouse should be ventilated and illuminated enough, and watering should be carried out when the water on the leaves is easy to dry, preferably from the edges to avoid wetting the leaves.
3. 50% carbendazim or 70% carbendazim or 70% methyl thiophanate wettable powder 500 times can be used for drug control. If necessary, 50% carbendazim or 50% prophylaxis and 50% nonglide wettable powder 1000 / 1500 times plus 80% carbendazim 600 times solution has a good effect. The liquid is sprayed at a rate of 40kg to 50kg every 667m 2. Focus on spraying new leaves and the surrounding soil surface, spray twice in a row.
- Prev
Prevention and control of lily blight
Symptoms: the whole plant (including floral organ, leaf, stem, stem base, bulb, root) can occur. The susceptible flower organ withered and withered, and white mildew grew on it; the leaf first appeared in water, then withered; the stem and stem base tissue appeared water-immersed spot, and then turned brown.
- Next
Control of powdery mildew of hundred-day grass
Powdery mildew occurs in all parts of China, and it is one of the main diseases. The leaves of the severely damaged plants withered and withered as soon as they bloomed. Seriously affect the ornamental of the plant. Symptoms: the disease mainly harms the leaves, mainly on the adult leaves. Early stage of the disease
Related
- A course of planting techniques and methods on how to grow carrots
- How to plant the latest tulips?
- Is it better to pick tea in the morning or in the afternoon? When is the best time for tea to be picked? what is the third or fifth tea?
- Launch Yuanxiao Happy combination Haocha + Tea Yuan healthy Taste
- Penghu Tourism "Fireworks 20 Parade with You"
- 2022 West Lake Happiness holds "Digital Revitalization Voucher" and draws iphone13 and laptop.
- Banqiao Fuzhou social houses are designed to change start-up combined with police elimination to create a safe and livable environment
- The convenient measure of "mechanical weeding" in Xinbei has been abused and the Agriculture Bureau has imposed heavy penalties on the illegal land consolidation.
- Changgeng University Joins Hands with Four Memory Factories to Rescue Memory Talent Shortage
- The list of Taiwan's top 100 MVP managers is listed by the Director-General of the Farmers' Association of Sanxia District.