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Some farmer friends reflected that recently he found that there are a lot of snail-like bugs on vegetables, and only the leaves of the vegetable leaves are left, after spraying with octyl thiophos, the effect is not very good, I don't know what to do! In fact, this insect has been seen by everyone, but there are many people who can't call it by name, and some places call it differently, today, let's get to know this insect, and then introduce the method of preventing it.
The insect is scientifically called kuò yú, also known as slugs, and belongs to the mollusk phylum, an animal of the slug family. In recent years, it has often occurred in greenhouses, especially in alpine, cold, wet and humid areas.
<h1>Host and harm</h1>
Slugs are very heterogeneous in their diet and can harm a variety of vegetables and weeds in greenhouses. It is mainly to scrape the leaves of vegetables and other crops, especially seedlings and young leaves, often causing the leaves to form holes, and only the leaf veins are left in severe cases. At the same time, it will leave manure on the vegetable leaves, contaminate vegetables, greatly reduce the quality of vegetables, and cause rotting of vegetable leaves. In severe cases, it causes the lack of seedlings and ridges, or the continuous leaves are eaten and eaten.
<h1>Habits of life and harm</h1>
Slugs like to eat the leaves and stems of a variety of vegetables, especially the parts with high water content and young age. Crawling places often secrete white mucus bands, hence the name slug. There can be 2–6 generations a year, with overlapping generations. It prefers to work in damp grass, mounds, bricks, pots, in soil crevices in vegetable rhizomes, and in damp, dark, humus-rich places around greenhouses.
Slugs are light-afraid and are mostly active at night, reaching peak activities at 10–11 p.m. Before sunrise, they sneak into the soil and hide. The optimal operating temperature is 15–25°C and the humidity is 88–95%. Can tolerate low temperatures, –7 °C still not fatal. And strong hunger tolerance, in poor environment can sleep for 1-2 years. The northern region is the most harmful from July to September, and the winter in the greenhouse is heavier. Vegetables are over-densely grown, the vegetable fields are low-lying, poorly drained and the soil is sticky.
<h1>Prevention and control methods</h1>
1. Agricultural prevention and control. Greenhouses should be ventilated and light-permeable to remove weeds in and around the field. During their peak spawning period, pay attention to tillage and expose the eggs to surface bursting. In the evening, some weeds and vegetable leaves can be stacked on the ground in the shed, and the catch can be uncovered in the early morning.
2. Chemical control. During the active period, 5–8 kg of quicklime (or copper sulfate) is sprinkled around the shed to prevent climbing in; 6% Mita granules are used to spread 0.5–1.2 kg per mu, and 10–25 cm of sieved sand soil is sprinkled on the surface at the seedling stage or germination stage for booby-trapping; 6% Mita granules can also be sprinkled between vegetable rows in the evening, in a pile of about 1 meter, and about 30-40 grains per pile is booby-trapped.