What is the disease of persimmon hard lifting?

Persimmon jujube madness. The leaves of the diseased plant are large, but they are falling and brittle, the leaf surface is uneven, the vascular bundles of the leaf veins become black, and sometimes the black veins can be seen on the surface; The dorsal branches of the main side branches of the diseased tree are long, erect and clustered, and the top is weak and "chicken claw branch".

Persimmon madness. The leaves of the diseased plant are large, but they are falling and brittle, the leaf surface is uneven, the vascular bundles of the leaf veins become black, and sometimes the black veins can be seen on the surface; The dorsal branches of the main side branches of the diseased tree are long, erect and clustered, and the top is weak and "chicken claw branch". Good control of leafhoppers and other vector insects can slow down the spread of diseases; Strengthen management and cultivate a strong tree; Trunks are drilled and perfused with penicillin.

Persimmon insects. The larvae mostly damage the fruit by boring into the young fruit from the base of the fruit pedicle. The victim fruit eventually turned into a "black persimmon".

Control methods: In June, according to the progress of the occurrence of pests, seize the incubation period of eggs, and choose 2000-2500 times of enemy killing or 20% rapid killing of 2000-2500 times liquid for prevention and control.

Scarab aeruginosa. Adults feed on leaves, which is more serious. The adult is 19-21 mm long, and the body and elytra are copper-green with a metallic luster.

The adult peak season is June. In addition, there are species such as four-striped scarab, which are harmful to sweet persimmon leaves and tender shoots. Prevention and control methods:

It takes advantage of its feigned death to hunt and kill in the early morning or evening. Spray the ground of the tree plate with dichlorine powder or 4% dipreme powder before vibrating. When the adult insect is harmful to the leaves, spray it with 2000 times the liquid killed by the enemy.

Spodoptera exigua. Adults are 20-22 mm long and have a wingspan of 40-44 mm. The head and thorax are gray, with black and brown spots, the antennae are brown, and the lower lip is grayish-yellow, obliquely extending forward and downward, resembling an olecranon.

Forewings greyish-brown with brown spots, anterior half brown within inner line, inner and outer line and hind half distinct, subterminal line black, middle outward. Hindwings yellow, with a black spot in the middle chamber, a black band on the outer margin, and two black stripes on the hind margin. The larvae have three color types: green, yellow and black, and the larvae are the pests of shoots and shoots.

It can be used to kill 2500-3000 times the enemy.

Scale insects. There are mainly persimmon cotton scales, paramecium scales, Japanese turtle wax scales, etc. According to the progress of the occurrence of pests, seize the incubation period of eggs, and choose two of the two alternating solutions of 40% chlorpat 1000 times, 25% chlorpat 1000 times, 35% Willik 1000 times or 35% scale lice 1000 times liquid for control.

The hard persimmon is broken, and it has the performance of softness, blackness, and flavor.

Persimmon is a deciduous tree of the persimmon family, native to East Asia. It has been cultivated in China for more than 3,000 years, with a cultivation area of 200,000 hm2. Persimmon is not only nutritious, but also contains a lot of sugars and vitamins.

And it has high medicinal value and economic value. So far, researchers from all over the world have found a variety of active substances in persimmons, including carotenoids, flavonoids, fatty acids, phenols and a variety of amino acids and trace elements, which can be widely used in medicine.

health care and cosmetics. Fresh persimmons, dried persimmon cakes, persimmon creams, persimmon pedicles, and persimmon leaves are all good medicines. Persimmon lacquer is a good preservative, persimmon wood can be used as carving materials, furniture materials, decorations and golf clubs.

After autumn, persimmon leaves are bright and pleasing to the eye, and have a good ornamental effect. Persimmon trees are extremely adaptable, can grow in mountainous areas with poor natural conditions, and are famous "woody grains" and "hardcore crops", with long economic life and good ecological and economic effects.

Classification of species. There are many varieties of persimmon in China, according to the statistics of the national persimmon resources survey, there are 1058 varieties of persimmon in China, many of which are unique varieties in China. Persimmons are usually divided into two categories: sweet persimmons and astringent persimmons; According to the color of persimmon fruit, it can be divided into red tomato, green persimmon, yellow persimmon, red persimmon, white persimmon and black persimmon; Depending on the shape of the fruit, it can be divided into round persimmon, square persimmon, long persimmon, gourd persimmon and ox heart persimmon.

In our country, the more famous ones are the chicken heart yellow persimmon abundant in Jingyang and Sanyuan in Shaanxi, the sharp persimmon in Fuping, Shaanxi, the square persimmon in the Gudang area of Hangzhou, Zhejiang, the big mill persimmon in North China, the lotus persimmon produced in Hebei and Shandong and the mirror persimmon in Heze.