Bacterial leaf spot of lily
Bacterial leaf spot is an important disease of lily, which occurs and distributes in some areas, and can occur in protected and open fields. Usually the diseased plant is 5% to 10%, which affects the yield and quality to a certain extent. The field incidence of seriously diseased land can reach more than 20%, which obviously affects the production of lily.
[symptoms]
The disease can harm all parts of lily, mostly showing symptoms of aboveground parts. At first, the green-brown nearly oval dots were dense on the leaves, then developed into near fusiform yellow-brown to dark brown necrotic spots, slightly sunken, the edges were flooded, green-brown, and connected to each other into irregular necrotic spots. The damp air causes leaf decay and necrosis in a short time. When the air is dry, the diseased leaves are light brown, necrotic and dry. With the development of the disease, the stem showed irregular light brown to yellowish brown necrosis, and then rotted or dried.
[pathogen]
I don't know. It is preliminarily identified as a kind of bacteria and needs further study.
[morbidity regularity]
It is observed that the disease mainly overwinters with seedlings or bulbs, and is transmitted with seedlings or corms with bacteria. When the conditions are suitable, the disease will spread through Rain Water, watering or pests to re-infect, resulting in the spread of the disease. Rainy and humid is good for the disease.
[prevention and control methods]
1. Strengthen quarantine and beware of transporting infected seedlings and bulbs.
2. Before planting, soak the seed bulb with 47 Mingjiarinong wettable powder 500 times, or soak the seed ball in 0.3% 0.5% hydrochloric acid solution for 5 minutes for 10 minutes.
3. Strengthen the field management and remove the diseased plants in time. Avoid flood irrigation and prevent stagnant water in the field after rain.
4. timely spraying and prevention in the early stage of the disease. See black rot of broccoli.
- Prev
"six views" in summer management of Lily
1. Look at the seedlings and fertilize. After sowing, lily seedlings began to emerge when the local temperature reached 14-16 ℃. Due to the long emergence time and high nutrient consumption of lilies, seedling fertilizer should be re-applied. Sprinkle with 1000 kg of fully mature human and animal dung or 20 kg of urea every 667m2. In the first ten days of June, when the lily entered the early flowering stage, the underground bulb growth accelerated, which was the key period for the formation of lily yield. 15 kg of urea is applied every 667 square meters. Lily has phosphates
- Next
Pollution-free cultivation techniques of Lily
Lily belongs to Liliaceae, its flowers can be watched, fresh stem is a kind of vegetable with high nutritional value and high medicinal value, and the economic benefit of planting lily is high. In this paper, the pollution-free cultivation techniques of lily are introduced: scientific land selection, reasonable rotation of lily should choose higher terrain, smooth drainage, loose soil and fertile land for planting. It is not suitable to choose the fields where the previous crop is pepper, eggplant and so on. Continuous cropping and continuous cropping are most avoided. The base fertilizer is mainly rotten farm manure, and the fully mature barnyard manure ranges from 1500 kg to 1500 kg per mu.
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