How to prevent and control the damage of Asian longhorn beetle to fruit trees

For the control of longhorn beetle, the effective method usually used is: dilution of trichlorfon or dichlorvos agent with water (the dilution concentration of trichlorfon is 30 times and the concentration of dichlorvos is controlled to 40 times), use a syringe to inject the solution in the cavity of the decayed tree, and then plug the hole with cotton wool soaked in the potion. You can also use mothballs to crush and put them into the tree hole, and plug the hole with a cotton wool soaked in the potion.

The following measures can generally be taken to prevent and control the longhorn beetle: after mid to late April, the main pest of Zhongwei Kuaihuo Forest is inserted more than 50cm from the ground, and the hole is punched at an angle of 45 degrees obliquely downward (the hole depth is 3-5cm) according to the specifications of the tree. When the adult worm appears, it can be caught by hand in the early morning when the dew is not dry or sprayed with Ruijinte 2000 times solution, but the cost is high.

The longhorn beetle harms almost all fruit trees such as citrus, lychee, longan, mango, citrus, etc. From April to May, the spawning period of the adult worm emerges into the burrow, and the trunk can be sprayed with 50% methamidophos 30-50 times below 30 cm, and sprayed once every 7 days, three times in a row.

During the spawning period when the longhorn beetle emerges into an adult burrow, it can be sprayed with 50% methamidophos 30-50 times below 30 cm of the trunk, and sprayed once every 7 days, three times in a row.

There are so many types of longhorn beetles, which one are you talking about? Each control method is different from the control period, such as the mulberry beetle that harms apples, the cloud-spotted longhorn beetle that harms walnuts, the red-necked longhorn beetle that harms peaches, plums and apricots, and the bare-shouldered star beetle that harms poplars. Prevention and control should be carried out according to the occurrence period of different species.

Method 1: Strengthen the management method: strengthen the cultivation management, reasonable pruning, pay attention to the variety allocation, and create a biodiversity planting environment, because the appropriate shade environment is less harmful than the all-light environment, and the growing and robust fruit trees have a certain insect resistance.

Method 2: Timely treatment of seriously damaged plants: when the parasitic branches of the longhorn beetle are found, about 20 cm of the damaged young stems can be cut, and the dead plants can be removed, burned in a concentrated manner or injected into the insect holes. 7 When the stems and leaves suddenly withered are found in August, the dead branches are removed and captured manually.

Manually kill adults and larvae, and cut down and burn the infested branches in time.

The longhorn beetle is the most serious pest of apples, grapes, pear trees, cherries, peach trees, citrus, walnuts and other fruit trees. It often causes serious damage to fruit trees.

Symptoms of harm. The larvae feed mainly on the branches of fruit trees, and the first instar larvae initially feed under the bark of the tree, and finally burrow into the xylem to infest, opening into the bark as a vent within a certain distance, and pushing out the feces and sawdust. After the fruit tree is damaged, its growth slows down, the tree becomes weaker, and it is also easy to be broken by the wind.

It can also cause the invasion of germs, complicated by a variety of diseases, and when the damage is serious, it can cause the death of the whole plant.

Characteristics of occurrence. There are many types of longhorn beetles, common ones are star longhorns, mulberry longhorns, bare-shouldered star longhorns, peach-necked longhorns, white-tendoned longhorns, red-edged longhorns, cloud-spotted white-striped longhorns, bamboo-edged tiger longhorns, etc., some complete 1 generation in 1 year, and some can only complete 1 generation in 2 3 years or even 4 5 years. Generally, in late April, the larvae begin to move, and drill the branches, in early July, the larvae are old and mature, and pupate at the vent in the wormhole, and emerge into adults in August, the adults feed on tender stems, shoots and leaves, 10 days later, the adults mate and lay eggs, lay eggs in the gaps of the shoots, lay 1 egg in each place, after the eggs hatch, that is, enter the cortex through the shoots, and then enter the xylem to harm, in October when the outside temperature is low, the larvae enter the overwintering and are no longer harmful.

Prevention and control methods. 1) For the prevention and control of longhorn beetle adults, August every year is the peak period of adult feteriation of longhorn beetles, which can be diluted 900-1300 times with 40% thiamethacloprid microcapsule suspension, and used a motorized sprayer for forest spraying. After 2 hours of application, a large number of beetles began to die, and the control effect could reach more than 90% after 24 hours.

When used under rainy conditions, it can last for about 40 days; When used in low rain conditions, it can be effective for up to 90 days. This greatly reduces the number of pesticide applications and the amount of pesticides, so that pests at different insect stages can be controlled, and the cost of control is greatly reduced.

2) larval control: 4 July is the best period for the prevention and control of longhorn larvae, you can use 40% chlorpyrifos 5 times solution dipped in cotton balls and put them into the bottle for later use, when the vents of longhorn larvae are found, the cotton balls are plugged tightly with tweezers. When excrement and sawdust can not be discharged, the larvae of the longhorn beetle must use the mouth bite cotton ball to clean the channel, and the chlorpyrifos also has good systemic conductivity, which can be conducted upward in the xylem of the tree, and the larvae of the dayhorn will be killed when the larvae feed.

The validity period can be more than 40 days.

<> Catch adults manually: Choose a suitable time in June and July (the peak of adult worms), hook the branches with a long bamboo pole with an iron hook from noon to 3 pm, and then shake vigorously to make the adults fall, and then catch them one by one. The branches are painted white:

Whitecoat the trunks and branches of fruit trees to prevent adults from laying eggs. Drug control: spray 10% imidacloprid (2000 times solution) on fruit trees, spray 1 time every 7-10 days, and spray 2-3 times in a row.

01 Insecticides insecticide.

Generally, there are longhorn beetles at home, and the most taken is insecticides to kill insects, so you can buy some insecticides, but you must pay special attention to ventilation, otherwise people are easy to be poisoned in the insecticide environment for a long time.

02 Artificial killing.

Generally, it is more environmentally friendly, and the stupider method is to kill it manually, but it is not so easy to catch the longhorn cow, if you catch the longhorn cow with relatively high technology, then take the method of artificial killing.

03 Clean up fresh tree bark in your home.

Generally, the furniture with fresh bark in the pure home is the most tolerant of the destruction of the hall is prone to the appearance of the longhorn, so once there is a longhorn in the home, clean up the fresh bark at home as soon as possible, the cow has no room to survive, and it will slowly perish.

04 Plug the cavities with dirt.

Where there is a longhorn beetle at home, there are generally cavities, so when you find a cavity, first inject poisonous water, and then plug the cavity, so that the eggs and adults of the longhorn are killed!

Answer: Xingtianniu belongs to the family Coleoptera, also known as Silver Star Longniu, commonly known as buffalo cattle, and is distributed in all jujube areas. The larvae eat the xylem and root cortex of the branches, causing the tree to weaken and die. It is an important pest of jujube trees, and also harms a variety of forest trees and fruit trees.

1) Morphological characteristics.

Imago. The body is about 32 mm long, the body is black and shiny, the antennae are whip-like black, the length exceeds the body 1 5 segments, and there are blue hair rings in 1 3 segments except the base 2 segments.

Ovum. Olong-shaped milky white.

Larvae. The body is about 50 mm long, yellowish-white, with a light brown head and an enlarged thorax.

Pupae (naked pupa). Milky white, about 32 mm long (Figure 27).

Fig.27 Star Bull.

1.Adult 2Egg 3Larvae.

2) A brief history of life.

One generation occurs in one year in most areas, and the larvae overwinter in the xylem at the base of the trunk. Begin to emerge adults in early May, early June is the peak period, adults feed on leaves and tender skin, June is the peak of oviposition, eggs are mostly laid in the phloem tissue about 20 cm in the upper part of the root neck, the egg period is 9 15 days, mid and late July is the peak of egg hatching, the phloem is eaten before the 2nd instar, and the xylem is eaten after the 2nd instar, usually leaving a ventilation and fecal hole at 5 10 cm in the upper part of the surface, and from November, the mature larvae begin to pupate and overwinter.

3) Prevention and control methods.

Agronomic measures. 5 In June, the adults of the upper tree were manually captured, and 20% dichlorvos diesel emulsifier was applied to the wound of the adult bark to lay eggs.

Pharmacological prevention. Find the insect feces and insect holes in time, clean the insect mouth, and plug the insect holes with cotton wool balls that are 200 times 80% dichlorvos, or plug the insect holes with a swab.

(1) Artificial control: using the feigned death of the adult beetle, the branches can be shaken in the morning or after the rain to shake the adult to the ground to kill. Or use a small sharp knife to kill the eggs in the hatching tank during the oviposition period of the adult worms.

In the larval stage, the branches are often inspected, and when insects are found, the larvae are killed by digging up the cortex with a knife, and the dead shoots are found to be pruned in time and treated intensively.

2) Pharmaceutical control: Put a cotton ball stained with 30 50 times 50 dichlorvos emulsifiable concentrate or 40 dimethoate emulsifiable concentrate in the new fecal discharge hole, or put in 1 4 pieces of aluminum phosphide, and then seal the insect mouth with mud for pesticide killing.

3) Whitening of the trunk: The eggs laid by the star beetle are mostly in the lower part of the trunk, and the whitening coating can be applied to the trunk (1 part of quicklime: 1 part of sulfur powder: 40 parts of water), which has a taboo effect on adults.

The hazards of the longhorn beetle and its prevention and control measures.