Prevention and control of diseases and insect pests of licorice
The main diseases of licorice are rust, powdery mildew and brown spot.
Licorice rust mainly harms the leaves and tender stems of the plant. Yellowish-brown blister is produced on the back of the infected leaves, and brown powder is released after the epidermis is ruptured.
The control method burns the leaves of diseased plants. At the initial stage of the disease, it can be prevented and treated with 1000 times of powder and sulfur mixture or 65% wettable Dysen zinc, once every 7 to 10 days, 2 to 3 times in succession.
Licorice brown spot, also known as leaf spot, mainly harms the leaves, the leaves produce round or irregular disease spots, the center of the disease spot is grayish brown, the edge is brown, and there are black mildew on both sides of the disease spot.
In the early stage of the disease, the broad-spectrum antimicrobial pesticide Gai Zhiling was sprayed 1200 to 1500 times, once every 7 to 10 days, twice to 3 times. Or spray 1 ∶ 1 ∶ 100 to 1 ∶ 1 ∶ 160 Bordeaux solution or spray 70% methyl thiophanate wettable powder 1500 to 2000 times.
Licorice pests mainly include licorice carmine scale, grub and other underground pests; alfalfa bugs, short-haired grass weevil, aphids and other ground pests; licorice bean elephant, licorice seed cicada and other seed pests.
The short-haired grass elephant, from July to early August, mainly feeds on licorice leaves. Prevention and control methods: use little or no pesticides as far as possible, you can choose biological pesticides and low-toxic pesticides, such as 2.5% deltamethrin emulsion 1000, 2500, 5000 times, 45 kg per mu. Chemical control can be considered when the insect population density reaches 100, but the effect on the quality of licorice in the future must be considered.
If aphids occur, spray 50% fenitrothion 1000 times to 2000 times or 40% dimethoate 1500 times to 2000 times. 1500 times of dichlorvos EC can also kill aphids. Once every 7 to 10 days, it can be eliminated several times in a row.
- Prev
Control of diseases and insect pests of licorice
(1) Rust: the disease occurred from May to June, causing damage to leaves. Prevention and treatment methods: ① concentrated burning of diseased branches; at the initial stage of the onset of ②, 90% diazepam sodium was sprayed 400 times. (2) Brown spot disease occurred from May to June, causing damage to leaves. Prevention and treatment methods: ① concentrated burning of diseased branches; at the initial stage of the onset of ②, spray 1: 1 100: 160 Bordeaux solution or 70% methyl topiramate wettable powder 1500-2000 times. (3) powdery mildew occurred from May to June, causing damage to leaves. Prevention and control method: spray 0.2-0.3 Baume stone sulfur
- Next
Finding biological agents for diseases and insect pests during the growing period of Chinese wolfberry
With the birth of four kinds of compound pure biological agents prepared by the research group of "Research on Biological Control techniques of main Diseases and insect pests of Lycium barbarum" of Institute of Plant Protection of Ningxia Academy of Agricultural and Forestry Sciences, the diseases and insect pests restricting the development of Lycium barbarum industry in Ningxia have finally encountered the biggest "natural enemies". The use of this chemical will realize the biological control of diseases and insect pests in the whole growing period of Chinese wolfberry, which can not only reduce the times of control, but also improve the quality of Chinese wolfberry. Lycium barbarum is a traditional Chinese medicine grown in Ningxia, and it is also a leading industry determined by the party committee and government of the autonomous region. However, the occurrence of diseases and insect pests of Lycium barbarum is extremely complex.
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