How did the shell-less snail come from? Are Shellless Snails Useful or Harmful?

1. Shellless snails are a kind of Gastropoda, also known as slugs and slugs. The slug is a mollusk, which is herma

How did the shell-less snail come from? Are Shellless Snails Useful or Harmful?

1. Shellless snails are a kind of Gastropoda, also known as slugs and slugs. The slug is a mollusk, which is hermaphrodite and looks like a snail without a shell. Its body surface is smooth, moist and sticky, and it is dark black, dark gray, yellowish white or grayish red. 3. Shellless snails (slugs) are pests, mainly eating taro, bread trees, banyan trees, blood tung and other plants.

1. How did the shell-less snail come from?

1. Shellless snails are actually slugs, also known as water dragonflies and slugs, which are the general names of Gastropoda, Cladocera and slugs.

2. Slug is a mollusk, which forms a lung order with some snails. Slugs are hermaphroditic. They look like snails without shells. Their bodies are wet and sticky.

3. Adult slugs are 30-60 mm long, 4-6 mm wide and 4 mm long and 2.3 mm wide.

4. The slug is long spindle-shaped, soft and smooth without shell, and its body surface is dark black, dark gray, yellowish white or grayish red.

5. The adults and larvae of slugs will overwinter in the moist soil at the roots of crops and move in the fields from May to July, which will do harm to crops. When the temperature rises, the activity of slugs weakens, and when the climate is cool in autumn, it will come out to do harm again.

Second, is the shell-less snail a beneficial insect or a pest?

1, Is the shell-less snail (slug) a beneficial insect or a pest?

Shellless snails, that is, slugs, are pests and will harm crops.

2. Living habits of shell-less snails (slugs)

(1) slugs have a wide range of feeding habits, mainly feeding on plants, fungi and their fruits, such as potatoes, bread trees, banyan trees, Erythrina, wedelia, vegetables, mushroom bulbs and mushrooms.

(2) The slugs will lay eggs from May to July, and the egg period is 16- 17 days, and it takes about 55 days from hatching to adult sexual maturity. The spawning period of adult shellfish can be as long as 160 days.

(3) Wild slugs are hermaphroditic, which can be cross-fertilized or fertilized at the same time.

(4) The eggs of slugs are generally laid in hidden soil cracks with high humidity. They lay eggs once every 1-2 days, with 1-32 eggs each time, and each place lays about 10 eggs, with an average of more than 400 eggs.