What is a snail without a shell called What is a snail without a shell called

A snail without a shell barksSlugs, harmful to crops, but harmless to humans.

The slug, to be precise, is the yellow slug, commonly known as the slug.

Worms, snails, snails, fetal insects, etc. It is the phylum Mollusc.

The lower gastropods belong to the slug family and the slug subfamily. With part of the snail composition there is a pulmonary. Slug hermaphroditic.

It looks like a shellless snail, with a moist body surface with mucus, and the adult is 30 to 60 mm long and 4 6 mm wide when straight; The inner case is 4 mm long and mm wide. Long shuttle type, soft, smooth and without shell, with a dull black, dark gray, yellowish-white or grayish-red body surface.

antennae 2 pairs, dark black, the lower pair is shorter, about 1 mm, called anterior antennae, with sensory effect; The upper pair is about 4 mm long, called the posterior antennae, and the end is eyed. There is a toothed tongue in the mouth. The anterior end of the dorsal body has a mantle, which is 1 3 long, the edge is rolled up, and there are vestigial shells (i.e., shields) in it, with distinct concentric circles.

Threads, i.e., growth threads.

The center of the concentric circle line is to the right at the posterior end of the mantle. The breathing hole is located in front of the right side of the body, and is surrounded by small colored lines. Blunt.

Mucus is colorless. About 2 mm behind the right antennae is the genital foramen. The oval is oval, tough and elastic, 2 mm in diameter.

The nucleus is visible in white and transparent, and the color becomes darker near hatching. The larvae hatch are 2 mm long, light brown, and have the same body shape as adults.

Habits. Slug overwinters in adult or larvae under wet soil at the roots of crops. From May to July, a large number of activities in the fields are harmed, and in summer, the temperature rises, and the activities weaken, and in autumn, when the climate is cooler, the activities are harmful.

Wild slugs are afraid of light, and die in 2-3 hours under strong light, so they are active at night, starting from the evening, reaching a peak at 10-11 o'clock in the evening, and diving into the soil or hiding places before the early morning. Strong hunger tolerance, can not eat or move in the absence of food or poor conditions. The dark and humid environment is suitable for its life, when the temperature and soil moisture content are 20-30%, it is most conducive to its growth and development.

Slug feeds on a wide range of foods, mainly eating taro and bread tree.

Fig, blood tung, chrysanthemum.

Plants such as biflora chrysanthemums, vegetables, mushroom bulbs, mushrooms and their fruits, etc.

It's called slugs. The scientific name of this insect is slug, commonly known as slug, which belongs to a pest.

The diet is very mixed, especially prefers to feed on young and tender organs.

Scraping vegetable leaves and stems with teeth and tongues causes leaf holes to be cut and riddled with holes.

When the seedlings are harmed, the seedlings can be bitten off, resulting in the lack of seedlings and broken ridges, and leafy vegetables such as lettuce, cabbage, and bracken are often seriously damaged during the peak production period.

Snails and wild slugs prefer a shady and humid environment, and mostly feed at night and on rainy days, and the two often occur together.

Slugs, similar to snails.

A snail without a shell is called a slug. The slugs are elongated fusiform, about 3-6cm long, about 3-6cm wide, dark black, dark gray, yellowish-white or gray-red body color, smooth and soft body surface, without shell. There are 2 pairs of antennae, of which the posterior antennae have eyes at the end.

1. Classification of the natural world

Slugs belong to the phylum Mollusks, Gastropoda, Pneumosnails, Heterognida, Stalks, and Slugs.

Second, the appearance characteristics

1. Egg: The egg is oval, tough and elastic, with a diameter of about, a white transparent and visible nucleus, and the color is darkened when it is close to the incubation period.

2. Larvae: The body length of the newly hatched larvae is about 10, the body color is light brown, and the body shape is similar to that of the adult.

3. Adult: The adult body length is about 30-60mm, the body width is about 4-6mm, and the inner shell is about 4mm long and wide. The body shape is elongated and supple without a shell, and the body surface is dark black, dark gray, yellowish white or gray-red.

There are 2 pairs of antennae, which are dark black, of which the upper pair of antennae is about 4mm long, called posterior antennae, and the end has eyes; The lower pair of antennae is short, about 1 mm long, and is called the anterior antennae, which has a sensory effect. There is a toothed tongue in the mouth. The anterior end of the dorsal body has a mantle, about one-third of the body length, the edge is partially rolled, and it contains vestigial shells, with obvious concentric circles (i.e., growth lines).

The center of the concentric circle line is to the right at the posterior end of the mantle. The breathing hole is in front of the right side of the body, surrounded by small colored lines, and the genital hole is about 2 mm behind the right antennae. Mucus is colorless.

3. Habits

1. Slug has a wide range of feeding habits, mainly feeding on vegetables, mushroom bulbs, mushrooms, potato, ficus, blood tung, bread tree, chrysanthemum, double-flowered chrysanthemum and other plants, fungi and their fruits.

2. Slug is nocturnal and active from evening to early morning (around 10-11 p.m. is the peak period of activity), and lurks in the soil or shade during the day.

3. Slug has a large number of activities in the field from May to July, and its activities are weakened due to high temperature in summer. When the weather cools down in autumn, there is a lot of activity again. In winter, it overwinters under wet soil at the roots of crops.

4. The suitable growth temperature range of slugs is about 20-30% of the suitable soil moisture content.

The scientific name of the snail without a shell is slug, and everyone usually calls it a slug.

Slug (scientific name: limacidae) is a general term for gastropods, stalks, stalks, slugs, slugs, snails, snails, etc. It often lives in dark and damp places, and rises at night during the day and at night, and rises in the rain during the day.

The body of slugs is soft, smooth and without shell, the body surface is dark gray, yellowish-white or grayish-red, and a few slugs have inconspicuous dark bands or spots on their bodies, and two pairs of dark black antennae. The mantle is 1 3 body long, the edges are rolled up, and there are vestigial shells (i.e., shields) in it, and there are obvious synchronically amorphic recentric circles (i.e., the growth lines of slugs), and the mucus is colorless.

About 2 mm behind the right antennae is the genital foramen. The body length of the slug, when straightened, is 30 60 mm, and the body width is 4 6 mm. The inner case is 4 mm long and mm wide.

The yellow slug is one of the more common species of slugs, which is larger in size and has a yellowish-brown or dark tarni color. The lifespan of slugs varies, with some species living up to 1 to 3 years.

Hazards of slugs:

Because slugs have jaws and tongues in their mouths, which are used to hold food and lick and scrape food, they can eat up the leaves and growth points of plant seedlings. Slug mainly eats vegetable leaves, fruits and petals, etc., so that plant leaves form holes, or the peel of fruits is incomplete, which seriously affects the normal development and growth of vegetables. Because the food range of slugs is very wide, including most vegetables, food crops, fruits, flowers, medicinal plants and tobacco, cotton, hemp, edible fungi and other cash crops, and even green lawns and other trees, weeds and other plants, so it poses a serious threat to a large number of crops and other cash crops.

Including the breeding bees, when the box is serious, the box is covered with slug mucus, which contains a variety of enzymes, and the bees are easy to be trapped after being stained with mucus, and the live bee plum socks that clean up the debris will also accumulate more and more on the mucus, suffer from enzymatic hydrolysis, and finally be swallowed by the slugs, leaving the bee's head, and the bees stained with mucus will struggle to die. <>

A snail without a shell is called a slug. Slug is a general term for gastropods, stalk-eyes, and slugs. In some parts of southern China, the worm, commonly known as the slug, is a mollusk, hermaphroditic, which looks like a snail without a shell, and has a moist mucus on its body, and sprinkling salt on its body will cause it to die of dehydration.

A snail without a shell is called a slug. Slugs, commonly known as slugs, are mollusks that share the same structure as some snails and have lungs. It mainly eats the fruits of taro, bread tree, ficus, and blood tung. Hermaphroditic, it looks like a shellless snail with a moist mucus on the surface. <

A snail without a shell is called a slug. Slugs, commonly known as slugs, are mollusks that share the same structure as some snails and have lungs. It mainly eats the fruits of taro, bread tree, ficus, and blood tung. Hermaphroditic, it looks like a shellless snail with a moist mucus on the surface.