Recently, we have found that in some parts of the Apple Orchard, there are more snails on some two-year apple trees. On average, there are more than a dozen heads per tree, and there are more than two dozen heads. Because of their slow activity, it is difficult to see directly. Their damage to the leaves leaves white gums and feces on the climbed leaves, causing pollution to the leaves.
In order to clarify the laws of its activities, we have carefully observed that snails adapt to a wide range of environmental conditions, can be seen everywhere in orchards, two-year, eight-year-old apple trees, weeds, litter, and even iron wall fence Have their presence. Most of the snails on the fruit tree crawl on the back of the leaf, and a few on the branches. Snails are sensitive to sunlight and have habits of nocturnal emission. They generally start their activities after 6 o'clock in the evening and stop activities before 8 o'clock in the morning. On the cloudy days, they can crawl and feed all day. When the temperature is high during the day and the humidity is low, the snail seals the shell mouth with wax, which can be continuously lurking for several days without activity. When the conditions are suitable, the rain follows, and then they come out to feed.
The danger of snails lies in the fact that they eat leaves and cause meat holes in the leaves, and sometimes they defecate while feeding, leaving more mucus and feces on the leaves. Contaminated leaves are prone to mold and cause plant diseases. Snails like to gather on the back of apple and jellyfish leaves with relatively small enclosed leaves. There are often more snails crawling on leaves and petioles damaged by leaf-feeding pests such as chafers and boat-shaped caterpillars. Sometimes there are a few snails on the fruit surface. Crawling to stay.
Snails belong to mollusks, gastropods, feeding on decaying plants and laying eggs in the soil. Most of the snails found in the orchards we surveyed belong to the same type of snail with only a few grey snails. Relevant literature records that the same type of Pakistani snail lived in the damp bushes, grasses, field ridges, heaps of rocks, under the litter, the crop roots and earth seams and the darkness of the greenhouse, vegetable cellars, livestock pens around Humid, more humus environment, very adaptable. It breeds for one generation a year, and spawns mostly in April-May. It is mostly produced in loose, moist soils, crevices, dead leaves, or rocks under the rhizosphere. Each adult can produce 30-235 eggs. Most snails crouching in the soil below the pile of crop straw overwinter, larvae can also winter in the roots of crops. The newly hatched young snails are mostly saprophytic, mainly feeding on spoilage plants. Same-type Ba snails are more harmful to herbaceous flower plants such as saffron shamrocks and white clover, cabbage, and cabbage, while they are less harmful to trees.
Snails are more harmful to young trees of a year or two, and they need to be controlled when the number of insects is large. Effective prevention and control measures include agricultural control measures. In the spring and autumn, weeds, dead branches and fallen leaves in the orchard are removed, and the soil is deeply turned. During the growing season, dry branches and fallen leaves are removed in time, which can reduce the number of snail populations. Biological control includes the rearing of chickens and ducks in orchards, the protection of natural enemies of snails, and armor. Slow snail crawling can be manually captured. When the average number of snails per tree is as many as several tens or even hundreds of heads, chemical control is required. You can use 8% chlorhexidine granules, 1.5-3 kg per mu, mix 10-15 kg of dry fine soil, spread evenly. Orchard, lawn. Or use acetaldehyde (snail enemy) granules, apply 0.6-1 kg per mu, mix 10-15 kg of dry fine soil, and spread it to orchards and lawns in the evening. For snails like to inhabit wetlands, weeds and weeds in the appropriate application of more to minimize the number of snails. The picture shows snail crawls and faeces on the back of apple leaves and snails gathered in apple leaf clusters.
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