Snails are commonly known as snails and buffaloes. Snails are more miscellaneous and can endanger various vegetables and grains, cotton, fruit trees, and nursery stocks. Snails mainly scrape the young shoots, tender leaves and tender stems of the crops with tooth tongues, causing holes or nicks in the damaged parts. In severe cases, they can eat the leaves and bite off the tender stems, resulting in the lack of seedlings.
There are many kinds of snails, but the species that cause damage in the solar greenhouses are mainly the same type of snails and gray snails. Although the two kinds of snails are of different species, their living habits are generally the same, and they all prefer the damp and dark environmental conditions. Snails usually stay in the night, and they start to feed and eat in the early hours of the evening. They stop their activities the next morning and dig into the earth. A white mucus trace left behind the snail crawling. Because the snail optimum growth and development temperature is 15 °C ~ 25 °C, the relative humidity of air is more than 90%, which is exactly the same with the temperature and humidity environment of our northern solar greenhouse in autumn and winter, so the damage is heavier.
According to the living habits of snails mentioned above, it is recommended that:
1. As much as possible to use plastic film covering cultivation, this is not only conducive to the growth of strawberries, but also can prevent the snail crawling out of the ground to a certain extent, thus reducing the damage.
2. Artificial trapping and culling: Place leaves, weeds, and other points on the ridges of the strawberry as traps. The next day, when it is dawn, the snails in the haystacks will be captured and killed.
3. Spreading lime between the rows of strawberries will allow the snails to carry the lime on the sticks into the shells during the crawl and cause death by friction or water loss. Generally, the amount of quicklime to be applied is preferably 8 to 10 kilograms per mu, which is applied once every 5 to 7 days, and can be effectively controlled for 2 to 3 consecutive times.
4. Chemical control: The control of snails requires the selection of agents that are designed to kill molluscs. Commonly used are snails (also known as aldehydes, snails, polyaldehydes) and worm nets (by carbaryl Made from polyacetal). Generally during the snail stage, 6% of snail enemy granules per acre is used for 500 g, and 15-20 kg of fine soil is mixed. This is evenly applied to the rows of ridges of strawberries in the evening, or 6% of worm granules are used. 600-750 grams, mixed with fine soil. Can also be used 80% metaldehyde WP 1000 to 1500 times, or 70% of nectarine WP 1500 to 2000 times, after 4 pm ground spraying, when the snail crawls in the evening excavation activities, contact After the agent secretes a lot of mucus and die.
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