Control of common diseases and insect pests of sweet-scented osmanthus
2. Leaf blight: the damage of the leaf starts from the leaf tip and leaf edge, the small spot is light brown, and then expands into a round or irregular shape. The disease spot can be connected with each other up to 1 hand 3 to 1 inch 2 of the leaf, grayish brown, the edge is green, and small black spots are produced on the disease spot in the later stage. When high temperature and humidity, poor ventilation and weak plant growth, the disease is more serious, usually from July to November, spread by wind and rain. Prevention and control: the soil around the trunk can be loosened before the larvae fall into the cocoon, so as to induce the larvae to concentrate on cocooning, and then collect and destroy it. Or spray with a spore content of more than 10 billion / ml Bt emulsion, or spray with 2.5% deltamethrin EC or 20% fenvalerate EC 3000 times. 5. Red spider: high temperature and drought conditions often occur.
- Prev
Prevention and control of diseases and insect pests of cherry blossoms and management techniques in summer and autumn
1, disease control leaf blight ① remove and burn diseased leaves, spray Bordeaux solution before germination; ② sprays 65% Dessen zinc wettable powder 500x liquid from May to June, spraying soil every 7 to 10 days, continuously spraying 2 times 3 times. ① strengthens cultivation management of brown spot to create good ventilation and light transmission conditions.
- Next
Identification and control of orchid anthracnose
Anthracnose occurs in all areas where orchids are cultivated in China. When the disease is serious, it not only affects the normal growth of orchids, but also leads to the death of whole leaves. Anthracnose not only harms spring orchid, cymbidium, cymbidium and other terrestrial orchids (i.e. Chinese orchids, orchids for short), but also harms epiphytic orchids such as tiger orchid and broadleaf orchid
Related
- Fuxing push coffee new agricultural production and marketing class: lack of small-scale processing plants
- Jujube rice field leisure farm deep ploughing Yilan for five years to create a space for organic food and play
- Nongyu Farm-A trial of organic papaya for brave women with advanced technology
- Four points for attention in the prevention and control of diseases and insect pests of edible fungi
- How to add nutrient solution to Edible Fungi
- Is there any good way to control edible fungus mites?
- Open Inoculation Technology of Edible Fungi
- Is there any clever way to use fertilizer for edible fungus in winter?
- What agents are used to kill the pathogens of edible fungi in the mushroom shed?
- Rapid drying of Edible Fungi