How to control jujube anthracnose
First, the symptoms: the infected fruit first appeared reddish-brown spots, then the disease spot gradually enlarged, surrounded by a light yellow halo ring, and finally the disease spot color became dark brown, slightly sunken but then expanded slowly, and the shape of the disease spot was diversified, such as round, oval or fusiform. The flesh inside the spot changes from green to brown, necrotic, black or dark brown. The fruit generally does not fall off, but in the later stage or when there are more disease spots, it is often easy to rot and fall off, and a few dried fruits hang on the tree. 2. Prevention and control methods 1. Agricultural control (1) combined with meticulous pruning, cutting off the jujube hanging, disease and insect branches and withered branches on the tree, combined with basic fertilizer, cleaning up the fallen jujube hanging, jujube leaves, etc., buried at the bottom of the fertilizer application pit, and deep turning in winter to remove the pathogen. (2) strengthen the comprehensive management of jujube garden and increase the application of organic fertilizer. (3) reasonable intercropping. Intercropping low-stalk crops such as peanut and sweet potato in jujube orchard can reduce the air humidity in the garden and reduce the occurrence of diseases. (4) to change the processing method of jujube and adopt the Kang drying method to prevent the disease from being promoted by the environmental conditions of high temperature and high humidity. 2. Chemical control before the disease, generally in late June, Liangguoan will be diluted according to 400 murine 600 times solution, while adding a certain amount of osmosis or strong internal absorption of low-toxic chemical agents to eliminate the source of disease on the tree; near the disease period, combined with the prevention and control of jujube rust, spray again in mid-late July In the onset period, it is usually around the middle of August, sprayed once every 10 murals in 15 days, and sprayed 3 times in a row, and the medication is generally ended in the first and middle of September.
- Prev
How to identify and control jujube rust
(1) symptoms: jujube rust only harms leaves. At the initial stage, there are light green dots scattered on the back of the leaves, and then gradually protruding into a dark yellow, that is, a pile of germ summer spores. The shape of the summer spore pile is irregular and mostly occurs on both sides of the midrib, leaf tip and base. Yellow summer spores are scattered after the surface of the lesion is ruptured. At the front of the leaf corresponding to the pile of summer spores.
- Next
Control methods of jujube gall midge pests
This insect is commonly known as jujube leaf maggot, which is distributed in various jujube areas all over the country and harms young leaves, buds and young fruits with larvae. The young leaves were tube-shaped curled, purplish red, hard and brittle, and soon blackened and withered. After the bud is killed, it can not open, wither and fall off. The young fruit is not properly nurtured and grows up. When it is the size of a soybean, it turns yellow and falls off.
Related
- Moge, come on! The staff of the peasant association in the producing area of cantaloupe were frightened when the crowd gathered.
- Causes and Solutions of low Fruit setting rate of Apple
- Symptoms and control measures of passion fruit virus disease
- Fruit growing lesson: how do apple orchards keep high yields?
- Can you build orchards in the mountains? What are the pros and cons?
- How to manage the coloring period of Crisson grape?
- This paper introduces the processing technology of two kinds of fig products.
- How much is a month for retired teachers in rural areas by 2020?
- How can strawberry planting increase sugar content? We should pay attention to management in many aspects.
- What are the cultivation techniques on how to improve the yield of golden fruit?