What about grape worms?

Grape is a common fruit in life, and it will be listed in large quantities every summer, and it is very popular with people. What about grape worms?

1. Grape nodule aphid

Grape nodule aphid is not only a destructive pest, but also an important quarantine object. Grape nodule aphid overwinters as nymphs on the main root and lateral root of grape; in the spring of the following year, parthenogenesis occurs after feeding, that is, it lays eggs without mating and reproduces for 5-6 generations. After the grape root system is damaged, it grows tumor-like substance, which is bright yellow at first, and then turns brown and rotten.

Prevention and control methods:

(1) strengthen seedling quarantine and prohibit the purchase of seedlings from epidemic areas.

(2) disinfection of seedlings and soil. Soaking seedlings or cuttings in 30-40 ℃ water for 5-7 minutes, and then immersing in 50-52 ℃ hot water for 7 minutes can kill most pests. Injection of 36-72 grams of carbon disulfide per square meter of soil could kill most root nodule aphids.

(3) irrigating the root with chemical. In the occurred areas, permethrin, cypermethrin, dimethrin and other pyrethroids can be used 2000-3000 times to irrigate the roots in spring and autumn.

2. Grape tiger longicorn beetle

The grape tiger longicorn beetle mainly harms the annual bearing mother branch by the larva, and the perennial branch sometimes suffers. In August, adults lay eggs on branches and vines, and larvae eat new shoots. Sometimes a female branch has several larvae, which is eaten by stages. It is easy to break and even die when it blackens near the nodes of the damaged branches.

Prevention and control methods:

(1) remove the damaged branches and vines during winter shearing and burn them centrally.

(2) during the adult egg period in August, spraying 1000 times of dichlorvos EC for 2-3 times, killing 1500 times of eggs and 1000-1500 times of Shongxing could kill some adults and reduce the number of eggs laid.

3. Grape short-whisker mite

The red spiders on grapes are mainly short-whisker mites, which are harmful to grape leaves, fruit stalks, ears and so on. The leaves show many black-brown spots when they are damaged, and scorch and fall off when they are serious. When the ear is damaged, the pedicel and rachis are black, and the tissue becomes brittle and easily broken. After the fruit is damaged, the face of the fruit is ferruginous, and the surface of the pericarp is rough and sometimes cracked. The grape short beard mite has 6-7 generations a year, and the female adult overwinters in the seams of the old skin, leaf axils and loose bud scale villi, and begins to sting in the middle and last ten days of April of the following year.

Prevention and control methods:

(1) after the grape is unearthed on the shelf, spray 3 °be (Baume) stone sulfur mixture and 0.3% washing powder before germination.

(2) according to the damage occurred in the growing season, the white mite can be used to kill 2000 times, the red and white to kill 2000 times, and to clean the mites 2000 times. All kinds of pesticides should be used alternately to delay their resistance.

4. Grape two-star leafhopper

Two-star leafhopper, also known as two-point floating dust, small fierce insects, etc., mainly damage leaves, serious grape early defoliation, resulting in reduced production. The adult body is yellowish and occurs two generations a year, overwintering as adults in stone crevices and weeds near the vineyard. It is harmful to lay eggs on the plant with the spreading leaves of the grape in May of the following year.

Prevention and control methods:

The main results are as follows: (1) in autumn, the fallen leaves and weeds in the vineyard were thoroughly removed, and the population number of overwintering insects was reduced.

(2) the damage can be reduced by timely picking the heart, binding the vine and dealing with the auxiliary tip during the growing period, so as to improve the ventilation and light transmission condition of the shelf surface. Adult spawning period and nymph concentrated damage period; spray 40% dimethoate emulsion 2000 times, or 75% phoxim emulsion 1500 times, imidacloprid 3000-4000 times, 4.5% cypermethrin 1500-2000 times.

5. Plutella xylostella

The grape feather moth produces one generation a year. The larvae overwintered in the grape vines, and after hatching, the larvae were eaten into the tender stem by the base of the petiole of the new shoot. The larvae often pile up a lot of feces near the hole, and the injured part is often inflated like a tumor, so that the leaves turn yellow and the fruits fall off. The larvae began to do harm in July and overwintered in thick vines in October.

Prevention and cure method

The main results are as follows: (1) the inflated branches found in winter shearing should be cut off and burned.

(2) the twigs are often checked during Eclosion in June and July. When wilting or wormholes and faeces are found, 1000 times of phoxim emulsion can be injected through the holes, and then the wormholes are sealed with clay. Can also spray antidiuretic 2000 times liquid, Lesbon 1000-1500 times liquid.