Are snails harmful to corn What are the dangers of snails to crops?

Snails are a common pest in the humid paddy fields of the south, and in recent years, the northern regions have also suffered from them, especially on crops such as summer maize, vegetables, and cotton.

Compared with corn, it mainly harms corn leaves, but also bracts, filaments, grains, etc. It can cause leaf tears, and in severe cases, only leaf veins remain. Harm the filaments to cause poor pollination, and in severe cases, eat up all the filaments, so that the corn can not pollinate and set fruit.

It can also harm the delicate grains and cause the female panicle to be bald.

Prevention and control measures: 1. In the winter leisure season, plough and kill the overwintering individuals.

2. Agricultural measures. In plots where snails occur severely, eliminate field straw and mulch, destroy snail shelters. Timely tillage and weeding, reduce soil moisture, and destroy snail activities and living conditions.

3. Manually pick up snails in the field.

4. Chemical control. Take a spray of medication. Please refer to the drug label for details.

Snails eat a variety of vegetables, weeds and melon peels; leaves, stems, buds, flowers, juicy fruits of crops; All kinds of grass and green tree feed, juicy feed, bran feed, cake feed are eaten.

In September 2014, autumn vegetables and field crops, especially maize, were severely harmed by snails in Liangshan County, Shandong Province. By 2014, the snail hazard in the region had become an outbreak, with a wide range of occurrences, large areas and high densities. Snails are mainly harmful to corn leaves and female ears.

Only one layer of epidermis is left in the injured leaves, and there is an irregular notch, commonly known as opening the skylight, which is hemp and silky; Feeding on the filaments on the female panicle and the upper part of the panicle leads to the loss of grains and bald tips, which seriously affects the yield and quality of maize.

In recent years, snails have been damaged in a large area of vegetables in Nanning, especially leafy vegetable seedlings such as Chinese cabbage in autumn, which has affected the production of autumn vegetables. The snail pest of vegetables has risen from a rare and minor pest to a frequent and major pest, which has become an urgent problem to be solved in vegetable production.

Hello, dear, I'm glad to answer for you: the snail-resistant wild corn variety is Woyu No. 3. Woyu No. 3 new corn variety.

It is a single cross of mid-to-late maturing jade with M51 as the female parent and VK22-4 as the male parent in 2006. Inoculation identification, susceptible to large spot disease, ear rot, small spot, sheath blight, high susceptibility to gray spot, medium resistance to stem rot, resistance to snails, resistance to southern rust. Grain bulk weight 730 grams of lead liters, crude protein content, crude fat content, crude starch content, lysine content.

1. 600 grams of 10% snail dichloride (polyacetaldehyde) granules can be used and sprinkled on the furrow surface or under the corn bottom. 2. You can also use 30-60 grams of 80% tetraacetaldehyde, spray with water, and when the disaster is serious, you can apply the pesticide again every 10-15 days. 3. Snails will eat the fine buds and young leaves of crops, and eat various vegetables, weeds and melon peels.

4. Snails will parasitize on citrus fruits, gnawing on leaves, branch cortex and fruits.

1. What medicine can get rid of snails in cornfields

1. Remove the agent of the corn field snail.

1) Use 600 grams of 10% snail dichloride (polyacetaldehyde) granules per mu, spray the agent evenly on the furrow surface, or sprinkle the particles on the ground below the corn.

2) 30-60 grams of 80% tetraacetaldehyde can also be sprayed with water, and in the seriously damaged plots, it can be sprayed again at intervals of 10-15 days.

2. Symptoms of snails harming corn.

1) When snails are infested in corn fields, strip-like cracks will appear on the leaves of corn. Cracks in leaves that have been bitten by snails often leave only a layer of transparent epidermis.

2) When the snail damage is serious, it will lead to the lack of seedlings and the distortion of the leaves of the corn, which will affect the photosynthesis.

3) The rate of snail damage to corn fields is 10-15%, and the rate of damage in serious fields is more than 50%, which poses a great threat to the normal growth of corn.

Second, the hazards of snails

1. Snails are one of the most common mollusks on land, mainly feeding on plants and preferring to nibble on the fine buds and young leaves of crops.

2. Snails have a wide range of diets, staple food of various vegetables, weeds and melon peels, and will also gnaw on the leaves, stems, buds, flowers, juicy fruits of crops and various grass barley feed, juicy feed, bran feed, cake feed, etc., so wild snails have greater harm to crops.

3. Snails often parasitize on citrus fruit trees, citrus leaves are often eaten into notches, and the branch cortex of fruit trees is often eaten, and snails will gnaw on citrus fruits, resulting in the formation of pits.

4. Snails can also parasitize on plants such as forest seedlings, vegetables and flowers.

5. Snails will harm soybeans, generally in the soybean seedling stage, which will cause damage to leaves and stems, delay the emergence of stiff seedlings, decline in seedling rate, and eat up all the soybean seedlings in serious cases.

1. Artificial capture in the early morning or rainy days, centralized killing.

2. Sprinkle with 3 kg of tea cake powder per mu or add 100 kg of water with 100 kg of tea cake powder. Soak for 24 hours, take its filtrate and spray it, or spray it with 50% phosphine 1000 times.

3 per mu can use 8% kilograms of snail granules, mix fine sand or cake crumbs kilograms after grinding, when the weather is warm, the soil surface is dry in the evening sprinkled around the corn field, 2-3 days after the snail in contact with the agent secretes a large amount of mucus and dies, and the effect is better to prevent it again before the snail lays eggs.

Raise ducks. Feed the ducks to eat the snails first, and when the ducks get used to it, they will be put into the ground.

1. Sprinkle plant ash in the evening with dry and pure plant ash sprinkled on the stems and leaves of melons and vegetables, if the stems and leaves are dry, you can spray some water first, so that the leaves are moist and then sprinkled, snails will not climb up the stems and leaves to bite the stems and leaves.

2. Sprinkle lime powder After heavy rain, sprinkle a layer of lime powder around the trunk of the fruit tree, about 3 5 mm thick and about 40 cm wide.

3. Spray tea bran liquid with 1 kg of tea bran, process it into powder, add 10 15 kg of water, stir fully and mix evenly, soak for 8 12 hours, take the clarification solution, when it is found that there are snails on the stems and leaves of vegetables and melon flesh and pulp, when the flesh is harmed, spray on the stems and leaves or the crown of the tree, you can kill the snail.

The above prevention and control methods do not have any toxic residues, will not pollute grains, vegetables and fruits, spray or sprinkle on the same day, can be harvested on the same day, and do not endanger human health.