First, the main pests and diseases of winter jujube Bulkhead Light,Flood Led Light,Flood Lights,Led Flood Light JIANGMEN MOSCOT OPTOELECTRONIC TECHNOLOGY CO.,LTD. , https://www.zjsensorsled.com
1. Jujube mosquitoes The larvae damage young leaves, flower buds and young fruits. After the young leaves are damaged, they become twisted and deformed into a tube-like shape, which is purple-red, hard and brittle, and then becomes black and withered; after the flower buds are damaged, the flower buds can not be opened; the young fruit turns yellow after being licked.
2. The worm is the main pest in the production of winter jujube. The larva is the bud, the young leaves and the flower buds of the jujube, and is wrapped with silk to prevent the buds from stretching. When the damage is serious, the buds, jujube leaves and flower buds can be used. Eating out is extremely harmful.
3, jujube turtle wax cockroaches nymphs and adult thorns suck 1 to 2 years of shoots and leaves of the juice to harm, and secrete a large amount of excrement, causing parasitic bacteria, so that early jujube trees fall, young fruit shedding, tree potential Debilitating, causing pruning or whole plant death in severe cases.
4, jujube armyworm, the insect is larvae to damage the buds and leaves, with silk to affix two leaves, and feed on it to harm; this insect also eats flower buds, bite off the flower handle, with silk flowers on the branches The victim flower becomes dry, but does not fall off. The larva stumps the peel or breaks into the fruit in the later stage, and the feces are discharged out of the fruit, causing the victim to fall early.
5, peach small heartworm The insect is larvae in the fruit damage, vertical and horizontal food, the fruit is filled with insect feces, jujube fruit red and shedding, no food value.
6, jujube anthracnose disease is mainly caused by the fruit of winter jujube, but also harmful leaves. When the jujube fruit is damaged, the yellowish water-stained spots appear at the victim's side of the fruit shoulder or the fruit waist, and irregular yellow spots are gradually formed. The circular concave lesions are formed in the middle, and the lesions become black, causing fruit drop and disease. The bitterness cannot be eaten. The leaves are damaged by yellow-green peeling, and some are black-focused and hung on the jug. The disease can be infested at the flowering stage, but it usually begins when the fruit is close to maturity and harvesting.
7, jujube rust disease winter jujube main production area summer rainwater is large and concentrated, so that the area of ​​jujube rust disease continues to expand, causing great harm. The disease mainly harms the leaves, and the chlorosis of the affected leaves is scattered or bulging. It is the pathogen of the urediospores, most of which are found on both sides of the main vein, the tip of the leaf and the base of the leaf. In the later stage, the epidermis of the leaf ruptured, and the yellow powder-like urediospores were scattered. When it was severe, the yellowing was shedding, and even the leaves were completely lost, which not only affected the annual yield, but also affected the growth and results of the leap year.
Second, the main pest and disease integrated prevention and control technology 1, strengthen soil and fertilizer management to improve the soil improvement of the field, improve soil fertility, so that can be discharged, dry energy, promote the robust growth of trees, improve resistance to pests and diseases, reduce the rust of jujube, Jujube anthracnose, red spider, jujube turtle wax, etc. have obvious effects.
2, reasonable pruning to ensure good ventilation and light transmission conditions in the park, and timely cultivating and weeding, this can reduce the occurrence of red spider, jujube rust, jujube anthracnose.
3, pesticide control should choose the right time to achieve the best control effect. Before germination, spray 10% diesel emulsion or 5 degree Be stone sulphur mixture to control red spider and jujube turtle wax mites. At the beginning of March, the plastic film band was attached to the base of the trunk, and the tape was applied to the upper edge of the trunk. The grass rope was tied under the circle, and it was changed once every half month. The fire was replaced to prevent the tree from falling on the tree. Inducing females to lay eggs, focus on killing. Sprinkle 50% of the long- acting phosphorus 0.067%-0.1% solution on the tree before the leaves, and spray 50% phoxim on the ground near the base of the trunk in late April, 7.5 kg per hectare, which can kill the old 蛹Cooked larvae. In the first half of May, the 2.5% deltamethrin emulsion was sprayed on the tree before the hatching of the jujube turtle wax to form the shell. 0.03% to 0.05% solution, which is killed. After the rain in the first half of June, phoxim granules were sprayed on the ground around 1 m below the canopy to kill the unearthed peaches. At the end of June, the tree was sprayed with 50% monocrotophos 0.1% solution or omethoate 0.125% solution to control red spider and jujube turtle wax. In the middle of July, the canopy sprayed 50% of the antibacterial powder 0.167% solution or the powder rusting 0.067% solution to prevent jujube rust. At the end of July, a 2.5% solution of deltamethrin 0.03% was sprayed on the tree to control the nymphs of the peach heartworm and the jujube turtle. In mid-September, the tree was sprayed with carbendazim 0.2% solution or Ethylphosphorus aluminum 0.33% to 0.5% solution to prevent jujube anthracnose.
4. According to the biological characteristics of the main pests and diseases of winter jujube, physical control can be used to control pests and diseases. That is, in the autumn and winter, the litter under the tree is cleaned in time, combined with pruning, the diseased branches and the dead fruit are cut off, the old bark is scraped off, and the burnt is concentrated. At the same time, the use of autumn and winter, ploughing the soil of the garden, destroying the wintering place of pests, reducing the density of insect populations, and reducing the damage of diseases and insect pests such as jujube turtle wax, jujube ruler, peach small heartworm, red spider and jujube rust, and jujube anthracnose. When there is ice in the winter, hit the branches in time to shake off the jujube turtle wax. In the 1st to 2nd instar larvae of the larvae, the larvae can be shaken off and killed in time.