Jujube tree green bugs plague many farmers, when is the jujube tree green bugs more common?

Green bugs are attached to fruit trees by adults and nymphs, and use stinging and sucking mouthpartsThorns suck the sap of the top buds, young leaves and flower buds of fruit trees

Damage the buds, leaves, and buds of fruit trees. Leaf damage can result in shrunken leaves with a large number of holes, and flower buds will turn yellow-brown and then dry up or fall off. Also known as "scalding onset"; The apical bud is damaged and cannot germinate or extract a bare branch.

When the flower buds are killed, they stop developing and die. After the young fruit is damaged, black-brown water-stained spots first appear, and the flesh under the spots gradually shrinks and shrinks, resulting in stiffness and shedding.

After the jujube tree falls leaves and before germination, clean up the diseased branches, diseased jujube and dead branches in the yard, fallen leaves, fallen jujubes, weeds in and near the jujube orchard, and burn them intensively to reduce the number of wintering. At the beginning of April, the jujube orchard began to hang the green blind bug sticky insect board or apply sticky shellac on the main trunk to prevent the number of blind bugs and worms. Green blind bugs are the most harmful to jujube trees.

Adults and nymphs damage the young shoots, young leaves and flower buds of jujube trees. The leaves are damaged, at first as small dead spots, and later as the leaves grow, they become irregular holes. After the flower buds are damaged, they will stop growing and developing, and then wither, which will seriously affect the flowering and fruit setting of the jujube tree.

There are many natural enemies of green blind bugs, mainly including egg parasitic wasps, flower bugs, lacewings, hunting bugs, spiders, etc. It has become the main pest of grapes, pear trees, jujube trees, apples, cotton, sugar beets, tea, tobacco, broad beans, alfalfa, various grasses and other crops, the host is extensive, the harm is serious, the insect has entered the peak period of harm, we must pay attention to investigation and treatment.

The agent can be sprayed with 10% imidacloprid 1500 2000 times + cypermethrin EC 1000 1500 times or 10% imidacloprid 1500 2000 times + kung fu emulsifiable concentrate 2000 times, and the spraying time should be selected before 10 a.m. and after 16 p.m., and the tree is bare. After the flower buds are damaged, they stop developing, die and fall off, and in severe cases, almost all of their flowers fall off. After the young fruits were damaged, some appeared black necrotic spots, some appeared raised vesicles, and their pulp tissues were necrotic, and most of the damaged fruits fell off, which seriously affected the yield.

It is more common in spring and summer, and it begins to hatch in April, and reproduces rapidly from June to September.

It occurs more often in spring, mainly because in this case, everything often recovers, and the temperature is relatively high at this time, and it is easy to have some pests and diseases, so you should spray a large number of pesticides to control it.

In the fall. Therefore, at this time, many farmers will choose to prevent it in advance, after all, this kind of problem will seriously affect the quality of jujube trees.

There are many common insect pests of jujube trees, and the common ones in the northern region are red spiders, peach heartworms, jujube inchworms, bare-shouldered star beetles, turtle wax scale insects, etc. Their living habits are both the same and different, so the control period and method should also vary from insect to insect. However, comprehensive prevention and control is advocated.

Jujube armyworm: to harm jujube leaves and young fruits with larvae, to overwinter in the bark cracks with pupa, spring warm feathering adults to early summer to not cause serious harm, in the peak hatching period can be sprayed 50% dichlorvos 8000 times liquid several times to prevent and kill, in winter or early spring can scrape off the rough warped bark, eliminate overwintering insect eggs or cocoons. <>

There are many diseases of jujube trees, there are early defoliation, more flowers and fewer fruits, lame fruits, etc., these diseases are generally caused by waterlogging, although the harm is great, but at most it can only affect one season, as long as the prevention and control can be solved. There is only one disease. As long as it is infected, the damage is devastating, and this is jujube madness.

There are many common types of pests and diseases of jujube trees, and fruit farmers will reduce the yield of jujube due to the pests and diseases of jujube trees, which will affect the loss of economic benefits. Our common insect pests are: jujube armyworm, jujube stinging moth, tortoiseshell scale, jujube gall mosquito, green blind bug, peach heartworm, jujube flying elephant, jujube psyllid, etc.

Wheel Bi Chop. > jujube armyworm grows for 3-5 generations a year, and the generations overlap. All use pupae to overwinter in the rough bark cracks of the main trunk of the jujube tree, and emerge into adults in the spring of the following year, laying eggs on the young shoots and smooth branches, and the first generation of larvae hatch into the buds after hatching, and the young leaves and shoots that are cracked into undeveloped leaves can not germinate normally, thus reducing the yield. This year, the neighbor of Nongda cut down a jujube tree that had been planted for many years at home, not that he didn't want it, but that the jujube tree was infected with a very serious jujube madness, and the branches and leaves of the entire crown shrank together, and in desperation, he had to cut it down.

2 3 weeks before the germination of jujube trees, the tree body was sprayed with 5 Baumé stone sulfur mixture 1 time; In the budding stage, when the buds of jujube trees have just turned green, spray low-toxicity pesticides such as imidacloprid or lesbian twice to avoid the hazards of jujube inchworm and green blind tsubaki; From the end of June to the beginning of July, spray two special acaricides.

It prefers places where the speed is relatively high, and the temperature is more than 10 degrees, and the temperature is very average every day, and the egg period is 7 to 9 days.

Generally, they like to live in fruits with particularly coarse and sensitive juices, and refer to dry and prefer areas with moderate temperature of rock twigs, which have a relatively long lifespan, rapid reproduction, and are suitable for survival in autumn.

If the ambient temperature of planting jujube trees is too high or too low, and there is no frequent watering, fertilization and spraying of pesticides, it will cause green blind bugs in jujube trees.

The temperature is particularly high and the velocity of the air is very high, which can lead to this disease.

It is possible that he has encountered an insect plague, and it may be that the weather is hot and cold due to insufficient nutrition, and there is not enough water.

It may be that there is a lot of water in the planting area, or the planting temperature is relatively high, or it may be because the planting density is relatively large, so the reproduction rate of these insects is very fast.

In this case, you only need to expose the winter jujube tree to the sun for ten minutes every day. Watering a little every day.

Reasonable pruning, scientific pruning of jujube trees, focusing on cutting off old branches with green blind bug eggs, and dead branches. Scrape off the thick warped bark of the trunk, reduce the overwintering eggs of the green blind bugs, and turn several deep plates before freezing to eliminate the overwintering green blind bugs in the soil.

Special plant insecticides should be used, evenly sprayed on plant leaves, and watering should not be done during the medication, otherwise there will be no effect.

Green blind bugs belong to the order Hemiptera, blind bugs, commonly known as cotton green blind bugs, mosaic insects, small bed bugs, etc. It occurs all over the country, and the occurrence in the jujube area of the Yellow River Basin is large and the damage is serious. The green bug is a multi-host pest, which sucks plant juice with its stinging and sucking mouthparts, and the phenomenon of leaf breaking occurs after the plant is damaged, commonly known as "head-breaking madness" and "leaf-breaking madness".

In addition to jujube trees, the insect also harms cotton, alfalfa, beans, potatoes, wheat, field cyanine, carrots and a variety of fruit trees and other plants. Green blind bugs occur on jujube trees, and adults and nymphs concentrate on the buds of jujube buds to damage young leaves, buds and flowers.

1) Morphological characteristics Adult body length 5 mm, width 22 mm, green, dense short hairs. The head is triangular, yellow-green, the compound eyes are black prominent, the antennae are 4 filamentous, the length is 2 3 of the body length, the second segment is longer than the sum of the segments, the color from the first segment to the fourth segment changes from light to dark, the first segment is yellow-green, and the fourth segment is black-brown. The dorsal plate of the prothorax is dark green, with multiple small black dots on it, and the anterior margin is broad.

The small shield is triangular, slightly protruding, yellowish-green, **with 1 light longitudinal stripe. The forewing diaphragm is translucent, dark gray, the feet are yellowish-green, and there are brown ring spots at the end of the hind leg segments, and the hind leg segments of the female are shorter than those of the male, and the ends are black.

The eggs are 1 mm long. Yellow-green, long pocket-shaped, the eggs are slightly curved like bananas.

Nymphs 2nd instar nymphs yellow, 3rd instar wing buds, 4th instar wing buds over the first abdominal node The tips of the antennae and the ends of the feet are black-brown, the 5th instar nymphs are similar to adults, the initial green, the compound eyes are pink, and the whole is bright green, densely covered with black fine hairs, the antennae are egg yellow, the tips are darker, and the eyes are gray.

2) Habits and occurrence rules 3 4 generations occur in the north every year, 6 7 generations in the south, the eggs are overwintered in alfalfa, castor stalks, stubble, fruit bark or broken branches and soil, and the average daily temperature reaches 11 for 5 consecutive days in March and April of the following spring, and the eggs begin to hatch when the relative humidity is higher than 70%, and live on alfalfa and other plants first. When the jujube tree germinates, it flies to the jujube bud for damage, and then it is harmful to the flower. Adults have a long lifespan, uneven occurrence, strong flight power, like to eat nectar, begin to lay eggs 6 7 days after emergence, the oviposition period is 30 to 40 days, non-overwintering eggs are mostly scattered in young leaves, stems, petioles, tender buds and other tissues, exposed yellow egg cover, egg period 7 9 days.

3) Prevention and control methods Agricultural control In spring, the bark is carefully scraped and burned, and the jujube orchard is deeply cultivated and irrigated before winter, and the weeds in and around the field are removed, which can reduce the overwintering insect eggs.

Chemical control aIn the early spring when the eggs hatch at the peak of the peak period, spray 1500 times cyhalothrin) emulsifiable liquid, or 1200 times 20% acetamiprid solution, or 2000 times 10% imidacloprid solution, or 1500 times 48% chlorpyrifos emulsifiable concentrate solution to eliminate the newly hatched nymphs.

b.During the germination period of jujube trees, spray 1500 times 48% chlorpyrifos EC or 3000 times 2% avermectin solution, which not only does not harm natural enemies, but also can treat aphids and red spiders.

Physical control Every 50 acres install 1 "Shennongle" automatic physical exterminator, using the phototaxis of the insect to "shock" the adult.