How to prevent beetles from biting apple blossoms, and how to prevent beetles as pests of apple tree

At the turn of spring and winter, ploughing between the rows of apple trees helps to curb the growth of beetle larvae, because beetles are pests that move at night, you can take a headlamp in the apple grove, put a large pot of water under the lamp, so that the beetle is affected and falls into the water to die.

For scarabs, we can apply specialized pesticides. Once a week, the pests will be killed and the trees will be kept clean.

Scarab is very harmful to apple trees, and now humans use scarab natural enemies to ** this pest, which can be said to have achieved very good results, and there is no damage to the environment. It is also relatively environmentally friendly. And it is particularly effective for the treatment of scarabs.

Apple bitter pox.

Symptoms: The flesh under the skin of the diseased fruit first turns brown, shrinks into a sponge, and gradually appears on the surface of the fruit with a round and slightly concave discoloration spot, which is dark green on yellow or green varieties and dark red on red varieties. In the later stage, the flesh of the diseased part shrinks, the epidermis is necrotic, and sunken brown spots appear.

The food of the sick department has a bitter taste.

Pathogenesis: It is also known as bitter disease, which is a physiological disease that often occurs during the ripening and storage period of apples. It is mainly caused by the physiological calcium deficiency of the tree, excessive pruning, partial application and late application of nitrogen fertilizer, and the orchard with excessive tree body and poor fertilizer and water is seriously ill. Heavy rainfall and excessive watering during the fruit growth period are prone to aggravate the occurrence of diseases.

Prevention and control methods: more organic fertilizer should be applied to prevent partial application of nitrogen fertilizer, pay attention to timely drainage in the rainy season, and reasonable irrigation. Perennial seriously ill orchards, 70 calcium chloride 150 times can be sprayed in the middle and late stages of fruit growth, sprayed once every 20 days, a total of 3 4 times. When the temperature is high, in order to prevent calcium chloride from burning the leaves, calcium nitrate can be sprayed instead.

Apple coal stain disease.

Symptoms: It occurs on the outside of the apple peel, produces brown or dark brown stains on the fruit surface, the edge is not obvious, like coal spots, the mycelial layer is very thin and easy to wipe off by hand, and the disease often occurs in the direction of rainwater downstream. Apple fly faecal disease and coal stain disease often occur in combination, and the symptoms are complex and difficult to distinguish.

However, the common symptoms are: black hyphae on the surface of the pericarp and small black spots on the top, that is, the conidia or sclerotia of the pathogen; Small black dots form round lesions of varying sizes, and the fruit powder disappears at the lesions.

Pattern of onset:

Scarab is an important pest of apple trees, there are many species, not only eat leaves, but also harm flowers and fruits, as well as pear trees, peach trees, cherry trees and other forest trees. Scarabs on fruit trees can be controlled by a combination of artificial and pharmaceutical methods.

Precautionary measures: The hazards of scarab are closely related to temperature, humidity, food, cultivation methods and nearby forests, fruit trees, crops, pastures and other conditions. When selecting a nursery site, a soil survey should be carried out and, if necessary, soil disposal.

Disposal method: 3 Trichlorfon powder per mu l500 2500 grams or 50 500 grams of phosphine granules plus 25 50 kg of fine soil after full mixing, evenly sprinkled on the ground, and then turned into the soil, poisoning the beetle larvae grubs in the soil. Secondly, the grub distribution density is suitable for forest land, and the land should be prepared before afforestation to reduce the density of insect population.

Timely weeds in the nursery and timely irrigation. The nursery land should be deeply ploughed and ploughed before winter to increase the overwintering mortality of grubs. Third, the basal fertilizer applied to the nursery must be fully decomposed to reduce the oviposition of its adult worms.

Prevention and control measures: Scarab has clustering, feign death, phototaxis, and the harm is most obvious in hot and windless nights. Experts suggest using the scarab's feigned death and phototaxis, shaking the branches in the early morning or dusk to shake the scarabs from the trees to hold a hunt.

In addition, during the excavation period of scarabs, it can be artificially shaken down and killed by black light and vibrating insecticidal lamps. At the same time, 800 1000 times of 90 crystalline trichlorfon can be sprayed on diseased trees; 80 dichlorvos emulsifiable concentrate 1000 1500 times liquid, green Weilei 300 500 times liquid, all have good control effects.

Secondly, the source of beetle insects comes from many sources, especially the most insects in wasteland, and the orchard where Scarab occurs seriously, at dusk can be sprayed on the orchard ground and canopy with 1500 times of Nongdile liquid or Lesben, phosphine 1000 times liquid or 2000 times of Kung Fu Pyridin liquid, etc., which has a significant effect on controlling the damage of Scarab.

Scarab doesn't bite, it's just that his claws are sharp and can pierce your **! I have a male beetle, the last time I took him, I wanted to get rid of it, and I pulled it, and my slap bled out. What will bite.

Prevention and control method 1Use phototaxis to trap adult beetles Adult beetle beetle has strong phototaxis, can be baited with black light, and the light can be turned on at 8-10 o'clock in the evening. 2.

The use of chemotaxis to trap and kill adult beetles has obvious tropism to sweet and sour liquid and sauerkraut soup. 3.Try not to plant soybeans, flowers, sweet potatoes, and alfalfa in the orchard, and do not apply organic fertilizers that are not ripe.

4.During the occurrence of adult worms, spraying control, the types and concentrations of pesticides are the same as those of black velvet gill beetles. [

General approach.

Are you talking about beetles when apples are ripe?

Fruit-eating scarab has the characteristics of flavor and chromotaxis, and these two characteristics are artificially prepared into sweet and sour liquid preparation that scarab likes and containers that use the color of flowers and fruits to effectively kill.

Recipe for sweet and sour liquid: 1 part brown sugar, 2 parts vinegar, 10 parts white wine, 10 parts water. Preparation Method:

First put the brown sugar and water in the pot and boil, then add vinegar, close the fire and let it cool, then add the wine and stir well. The diameter of the container containing sweet and sour liquid should be as large as possible, and it is best to use an empty barrel of amino acids (5kg barrel), red or green, so that the killing effect will be better.

The container should be hung on a large branch in the middle and upper part of the canopy, which will expand the effective range of hunting and improve the use effect. Note: Trap beetles trapped in containers in a timely manner and add the liquid that has been evaporated.