How to prevent snails from occurring in orchards and vegetable fields? What kind of medicine?

Snails, also known as snails and buffaloes, are common harmful molluscs in vegetable fields and orchards. As long as they are moist and cool, they are the favorite snails and are distributed all over the country. How should the snail be prevented? What kind of medicine do you use?

Snail is a mollusk, which is one of the most important pests on fruit trees in hot and humid areas. Harm to leaves, branches, fruits, but also carry bacteria, mostly in weak trees, leaving a long white mark after crawling, rot can occur under suitable conditions.

Snails usually do a lot of damage from April to May and from September to October, and the damage in autumn is more serious than that in spring. Snails are hermaphroditic and allogeneic animals. The mating time is usually at dusk, night or cloudy and rainy days. They begin to lay eggs about 15 days after mating. They can lay eggs 4-6 times a year, 150-200 eggs each time, and hatch after 10-18 days. The newly hatched larvae only feed on the mesophyll of the crops, leaving the epidermis, and when they grow up, they often eat the crop leaves into holes or lacerations.

Its eating habits are miscellaneous, which can harm many kinds of vegetables and other crops, such as Cruciferae, Leguminosae, Solanaceae, etc. Snails lie dormant during the day and go out at night. Most snails start their activities and feed after 6 p.m., and reach a peak from 8 p.m. to 11:00. Their food intake decreases gradually after midnight, and gradually stops feeding in the early morning and sneaks into the soil or hiding places. Snails like dark, humid environment, and can move and feed day and night on rainy days or after watering.

Prevention and control of snails in orchard

1. Agricultural prevention and control

① often cleans fields, ploughs them in time, and removes weeds and crop residues from fields and borders. Destroy the snail's habitat and spawning grounds.

② ploughs the ground deeply in autumn and winter.

③ does not apply immature organic fertilizer.

④ enhances the tree potential, reduces the occurrence of rot, and makes snails have no living conditions.

2. Physical control

① kills artificially and raises chickens and ducks in orchards.

② sprinkles raw lime belt. Spread quicklime between or around the crop rows and be careful not to sprinkle it on the leaves.

③ sprinkle plant ash: in the evening with dry pure plant ash on the base of the stem, if the stem and leaves are dry, you can first spray some water, make the branches wet and then spread, the snail will not climb up the stems and leaves to bite the stems and leaves.

3. Chemical control

① tetraacetaldehyde and flour are mixed into paste and smeared on the tree trunk. There are no snails throughout the year.

② poisonous soil barrier: using tetraacetaldehyde carbaryl trap to prevent snails from getting into trees by spreading them on the ground of the orchard from March to April and August to September before they are stung.

Prevention and control of snails in vegetable fields

Life habits

The pest that causes similar damage to vegetables is mainly a snail, and there is also a shellless slug (kuoyu), commonly known as "slug". The living habits and control methods of these two kinds of pests are similar, mainly like the environment of high temperature, high humidity, overgrown weeds, daytime and night, afraid of seeing light, and can die in 3 hours under strong light, so they are both active at night, and reach their peak at 10: 00 p. M. and 11: 00 p. M., and then sneak into the soil or hidden places full of weeds before early in the morning. Experts remind everyone that these two pests mainly inhabit the soil wall in front of the greenhouse, which is the key area of prevention and control.

Prevention and control of snails

1. Spread poisonous soil or granules

Generally speaking, the composition of chemicals to control these two pests is tetraacetaldehyde, usually granules. The appearance of the finished tetraacetaldehyde preparation is light blue, has a special flavor, and has a strong attraction. When the slug is tempted to feed or come into contact with the medicine, it releases a large amount of acetylcholinesterase in the snail body, destroys the special mucus in the snail body, and makes the snail body dehydrated rapidly and nerves paralyzed. due to the loss of a large amount of body fluids and the destruction of cells, slugs were poisoned and died in a short period of time. The powder containing tetraacetaldehyde can also be used to mix 5 kilograms of fine sand, and uniform application on the ground can also have a contact effect. Vegetable medical network experts remind you that it is necessary to note that tetrameric acetaldehyde particles must be dry in order to play a role, if water softening effect will be greatly reduced, need to re-spread.

This is a chemical method that we often use, and if the pest is serious, experts recommend that we choose this method.

2. Sprinkle quicklime, plant ash and salt

The body fluids of snails and slugs are important substances to maintain life, and if they are consumed too much, it will cause pest dehydration and death, so the purpose of spreading quicklime or plant ash and salt in the greenhouse is to absorb their body fluids, resulting in dehydration and death.

It can be used to protect the front face of the greenhouse with high humidity and weeds. Of course, it can also be scattered alone near the root of the plant to prevent slugs from climbing onto the plant. The amount of lime is about 7 kilograms per mu, depending on the occurrence of slugs. Plant ash can not only kill slugs, but also make a good potash fertilizer when it enters the soil. Salt can cause a concentration difference on the surface of the slug, transfer water from low concentration to high concentration, and cause water outflow from the slug, resulting in death.

3. Bait killing

Slugs prefer some leafy vegetables, so they can use lettuce, kale and cabbage leaves as bait. Place the leaves where the slugs are infested and sprinkle contact-type chemicals around the leaves to kill the slugs. Or the leaves will be crushed and mixed with beer, and then added an appropriate amount of imidacloprid, scattered in the slug often active place, can also play a good killing effect.