Hazelnut pest control, hazelnut pest control technology and method measures

1. According to the occurrence of pests and diseases in the production of fruit trees in the region, when selecting tree species and varieties, it is necessary to consciously select tree species and varieties that are prone to pests and diseases in the region, so as to reduce the chance and degree of pests and diseases, thereby reducing the difficulty of pest control and reducing the use of chemical pesticides.

2. Tillage rotation Tillage can remove weeds and residual branches and leaves, and reduce the host and hiding place of pests and diseases. It can also be exposed to the surface soil by deep burial or turning to eliminate some pests and reduce the base of pests and diseases. In fruit tree production, the soil under the canopy is usually turned 20 to 30 cm deep before the autumn freeze, which can not only mature the soil, but also eliminate the pests that overwinter in the soil, such as the peach fruit moth, hawthorn leaf mite and two-spotted leaf mite.

Reasonable crop rotation and avoiding heavy cropping are important measures to reduce fruit tree diseases and pests, and it is even more important in pollution-free fruit production.

3. Cultivating non-toxic seedlings Through tissue culture, propagating detoxified seedlings is one of the comprehensive measures taken to produce pollution-free fruits.

4. Strengthen cultivation management, improve the resistance of fruit trees, reduce the occurrence of pests and diseases, such as increasing organic fertilizer, improving fertilization technology, and improving the nutrient level of fruit trees; Do a good job of plastic pruning to improve the light conditions of the tree; Thinning flowers and fruits, adjusting the balance between vegetative growth and reproductive growth, and ensuring the growth of the tree body.

5. Clean the orchard and eliminate the root cause of pests and diseases After the leaves fall off, thoroughly sweep the fallen leaves, diseased fruits and weeds, remove the stiff fruits, and burn them intensively or bury them deeply to eliminate the diseases and insects that overwinter in them. At the same time, in the dormant pruning, the diseased branches and insect egg branches on the tree are pruned to reduce the source of diseases and insects.

6. Scraping bark Many pests hide in rough bark, warped bark and cracks for wintering. If the rough bark and warped bark can be scraped off, 50 90 overwintering pests can be eliminated. Scraping the bark is preferably done in early spring. The scraped bark should be burned intensively.

7. Coating the trunk from the trunk whitening can reduce sunburn and frost damage, delay the germination and flowering period, and can also treat trunk diseases and pests. Whitening should be carried out in autumn, mainly to coat the main stem and main branches with white coating. The recipe is:

12 15 kg of quicklime, 2 2 5 kg of salt, 0 5 kg of soybean juice or 0 2 kg of vegetable oil, 2 kg of stone sulfur mixture stock solution. The method of preparation is to first dissolve the quicklime with a small amount of water, add water to make lime milk, then add vegetable oil or soybean milk, stir thoroughly, and finally add stone sulfur mixture and salt. Then use a brush to apply the white coat to the trunk and main branches.

Hazelnut: Hazelnut, (scientific name: Corylus heterophylla bess) belongs to the birch family, also known as mountain chestnut, sharp chestnut, chuizi, etc.

There are about 20 species of Hazelnut worldwide, distributed in Asia, Europe and North America; There are 8 species and 2 varieties in China, which are distributed in Northeast, East, North, Northwest and Southwest China.

Once the hazelnut is found to have a diseased plant, the diseased branches and leaves of the diseased plant should be eliminated immediately, appropriate branch thinning, increase light transmittance and ventilation, spray trifileone to prevent powdery mildew, scarab has a state of suspended animation, you can shake the tree body to make the scarab fall, manual killing, you can spray insecticides for chemical killing, weevils use a high concentration of D-M mixture to poison the adults.

A common disease in the cultivation of large hazelnuts.

Hazelnut powdery mildew:It mainly occurs on hazelnut trees in the northeast, harming the growth of leaves, and may also harm the branches, young shoots and fruit buds.

Cultivated large hazelnuts are the main insect pest.

1. Scarab:Scarab is a common pest, the hazelnut tree is mainly harmed by the Oriental scarab and apple hairy beetle, etc., they will eat the young leaves and leaves of the tree, the adult generally lays eggs in the soil, and after growing into a larvae, it will eat the root system of the plant, hindering the absorption of nutrients by the tree, seriously affecting the development of the tree.

2. Weevil:Mainly harm the wild hazel forest, artificially planted may also tremble and slip, need to be noted, the adult of the weevil will eat the young shoots and leaf branches, there are many wormholes on the leaves, the branches are hollowed out, easy to break, affect the growth of new shoots, but also lead to early fruit drop, but also will be excreted in the fruit.

Hazelnut pest control.

1. Hazelnut powdery mildew:Once a diseased plant is found, the diseased branches and leaves of the diseased plant should be eliminated immediately, if the disease is the center plant, all the plants can be cut down to reduce the source of infection, appropriate branch thinning, increase light transmittance and ventilation, spraying trifileone for prevention.

2. Scarab:First of all, it is necessary to implement the planting technology of crop rotation and rotational grazing, not suitable for continuous cropping, choose disease-resistant seeds, disinfect in advance, and also release appropriate Beauveria bassiana, attract native bees, birds, and attract the natural enemies of beetles.

3. Weevil:In the early stage of adult oviposition, it is necessary to spray as soon as possible, and the adults can be poisoned with a high concentration of D-M mixture, and the hazel forest as a whole should be disinfected, and it should be used once every half a month, and a total of about three sprays can be done.

Summary. What are the hazards, occurrence rules and control measures of shellworms?

Scale insects are most common in pear scales, and adults and nymphs often attach to the main branches, shoots, leaves and fruits of trees to absorb nutrients, and the branches are easy to weaken and die after being damaged.

Occurrence rule: In Liaoning, Hebei and Shandong provinces, three generations occur in one year, with 2nd instar nymphs or a small number of female adults attached to the branches for overwintering, and continue to damage in April of the following year, and the nymphs develop into adults in early to mid-May. After the male emerges, it mates with the female adult, and the female adult begins to give birth in early June, and the first nymph crawls on the branches, then fixes down, inserts the mouthparts into the parasitic tissue to absorb nutrients, and secretes wax to form a shell.

Due to the different overwintering states, the farrowing period is very long and the generations overlap, generally the first generation occurs in May and June, the second generation occurs in July and September, and the third generation occurs in September and November. After the nymphs crawl out of the shell and shed their skin three times, the male pupates and then emerges. The male becomes an adult, and the female nymph sheds its skin twice and becomes a female adult, and then copates and reproduces to cause new damage.

Overwintering control: In early spring (early April in the north), that is, before the overwintering insects are harmed, scrape off the old bark and warped bark to expose the insects in the crevices, and then spray 3 ° 5 ° stone sulfur mixture or 5

How to control underground pests of hazelnut trees.

What are the hazards, occurrence rules and control measures of shellworms? Scale insects are most common in pear scales, and adults and nymphs often attach to the main branches, shoots, leaves and fruits of trees to absorb nutrients. Pattern of occurrence:

In Liaoning, Hebei Yingpange and Shandong Province, three generations occur in one year, and the second instar nymphs or a small number of female adults are attached to the branches for overwintering, and the damage begins in April of the following year, and the nymphs develop into adults in early to mid-May. After the male emerges, it mates with the female adult, and the female adult begins to give birth in early June, and the first nymph crawls on the branches, and then fixes down, inserts the mouthparts into the parasitic tissue to absorb nutrients, and secretes waxy ridges to form a shell. Due to the different overwintering states, the farrowing period is very long and the generations overlap, generally the first generation occurs in May and June, the second generation occurs in July and September, and the third generation occurs in September and November.

After the nymphs crawl out of the shell and shed their skin three times, the male pupates and then emerges. The male becomes an adult, and the female nymph sheds its skin twice and becomes a female adult, and then copates and reproduces to cause new damage. Wintering control:

In early spring (early April in the north), that is, before the overwintering insects are harmed, the old bark and warped bark are scraped to expose the insect body in the crevices, and then sprayed with 3° 5° stone sulfur mixture or 5

The hazel weevil is also called the hazel weevil. In 2 years, a potato Bishen generation occurred, and it went through 3 years. Adults harm the leaf Hui missing pieces, young and tender fruit buds, and the larvae can burrow into the hazelnuts to feed.

The control method can be to spray 10% kung fu pyrethrin 2000 times to eliminate the adult worm during the peak of adult activity.

1. The adult hazel leaf curling weevil is black, the elytra are reddish-brown, with metallic luster, and have a longitudinal groove arranged regularly on the elytra. The adult head is black on the front, reddish-brown on the back, and the mesothoracic shield is black. The middle leg and middle neck of the adult foot are reddish-brown.

The adult is about 10 mm long, and the female is slightly smaller than the male.

2. After feeding and supplementing nutrition, the adult hazel leaf weevil lays eggs on the surface of the hazel leaves, and rolls the leaves into cylindrical leaf rolls, and the larvae are harmed in the leaf bracts of the curl folds, and a larva only harms one leaf in its lifetime. Due to the decrease of photosynthetic area, the normal synthesis, circulation and storage of organic nutrients of hazelnut were affected, which not only affected the fruit setting rate and kernel fullness of the plant in the current year, but also affected the flower bud differentiation of hazelnut, resulting in the decrease of the number of fruits in the second year.

Hazel leaf weevils occur in two generations per year in the Tieling area, overwintering in the adult state under the litter layer, under the rocks, and in the soil crevices. In mid to late May of the following year, the overwintering adults begin to feed, and after supplementing nutrition, they lay eggs at the tip of the hazel leaves, and roll the eggs into leaf rolls that resemble the size of cigarette filters, generally lay 1 2 eggs in each leaf roll, and 3 5 eggs have been found in individual leaf rolls, and the egg period is 3 5 days. After hatching, the larvae of the hazel leaf weevil begin to feed in the leaf rolls, and the larvae damage period is about 13 days.

3. There are many ways to control hazelnut leaf curling weevil, but considering the problem of hazelnut residues, it is recommended to spray insecticides (such as weevil, dimethoate, dichlorvos, phosphine, etc.) with systemic absorption, stomach toxicity and fumigation effects in mid to late May every year, as well as chemical pesticides with contact killing effects (pyrethrin, pyrethrin, etc.), so as to inhibit the harm of overwintering adults and hatched larvae in leaf rolls; or spray fumigants, contact agents and chemical pesticides with a short residual effect period after late May to drive away or eliminate overwintering adults; It is also possible to manually remove the hazel leaf roll and burn it from late May to early August to destroy the eggs and larvae of the hazel leaf weevil.

It is because the tree was not sprayed with nutrient solution in time, the tree was too dry, and the surrounding weeds were not cleaned up, resulting in excessive reproduction of the disease, and there was also a possibility that it was due to viral or bacterial infection; If you want to be thorough, you need to prescribe the right medicine, choose the right nutrient solution, choose the appropriate pesticide, dilute it to a certain concentration, spray it like a tree, and water it in time after spraying, and clean up the surrounding weeds in time.

It is likely to be caused by the presence of pests and diseases, rot, or infertile soil. In this case, we must pay attention to the prevention and control work, should spray some pesticides, pay attention to the right medicine, ensure sufficient light, and regularly prune branches and leaves to avoid rot.

There may be pests and diseases, there may be no timely watering and fertilization, there may be no regular pruning of branches and leaves, there may be improper management of water and fertilizer, to prune branches and leaves in time, to strengthen water and fertilizer management, to do a good job in soil drainage.