"Animals in the Soil" The land where plants live PPT courseware 2

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"Animals in the Soil" The land where plants live PPT courseware 2

locust

More than 4,500 species of locusts have been recorded, but only 20 species cause harm to agricultural production. Locusts are omnivorous insects, and almost all green plants are their hosts. Their food intake is large, which is difficult for other insects to surpass. Therefore, wherever locusts sweep, all the grass plants are eaten, and even plants that can bite are gone. One survived.

grasshopper

One of the locusts, with a pointed head, slender body, green or yellowish brown. It has three pairs of legs, the hind legs are strong and can jump very quickly. It has two pairs of wings, with long front wings and transparent hind wings. When flying, the forewings and hind feet rub together to make a "zaza" sound.

mole cricket

Commonly known as native dog. The body is long and slender, the wings are short, and the front feet are short and flat like shovels, and they are good at digging soil and building holes. It is one of the major agricultural pests that eats the roots, stems and seedlings of wheat, millet, cotton, vegetables and tobacco.

pentathlon

Among insects, it can be said that it is the only insect that can run, swim, fly, dig and sing all at once like a mole cricket. Although it is not good at everything and cannot win a single championship, it can still be called a "five-item champion". An all-rounder. (1) Almighty by sea, land and air. During the rice-planting season, when the fields are filled with water, the homes of the mole crickets are often washed away, so they come out of their burrows to escape. Some are swimming on the water, and some are running fast on the field ridges. At night, they fly towards the lights one after another. They are really all-round athletes who can swim, run and fly in the "sea, land and air".

(2) Efficient burrowing machine Speaking of the amazing burrowing ability of mole crickets, there is another legend. A long time ago, there was an emperor who imposed excessive taxes and oppressed the people. The people were squeezed by him to the point where they could no longer live, so they united to rebel. They picked up hoes and poles and rushed into the palace. After hearing the news, the emperor fled through the back door. The shouts of the chasing crowd were loud, and when the panicked emperor had nowhere to hide, he saw a soil hole dug by a cricket on the side of the road, so he dived into it and escaped this "catastrophe"; later, the emperor In return for saving his life, he gave the mole cricket a ridge on the edge of the field and let it eat the seedlings in the air as it pleased. Although the story is fictional, the powerful ability of mole crickets to dig holes is absolutely real.

(3) Not a good singer. Did you know that mole crickets can also scream? However, even if it imitates crickets and katydids to "move its wings and sing" and make a dull "cuckoo" sound underground, the result is far from elegant.

The last thing I want to say is that native dog is a traditional Chinese medicine.

Ant

Generally divided into several levels, namely male ants and queen ants, worker ants, and soldier ants. The feeding habits of ants are complex, including carnivorous and herbivorous; some are harmful to humans, such as small house ants that invade homes and invade people's food, causing contamination and spreading diseases. Oriental spear ants living in the fields can harm potatoes and cruciferous vegetables. and watermelon etc. Some ants can eliminate pests and become human friends. For example, red tree ants can control pests on citrus trees, and red-brown forest ants can eliminate forest pests.

ladybug

Ladybugs are a very beautiful beetle with a round body and smooth or downy elytra. They usually have black elytra with red or yellow markings, or red or yellow elytra with black markings. But some ladybugs, The elytra are yellow, red or brown without spots; the body length is usually between 1-15 mm. When we see a ladybug, we still have to count its star points and then name it.

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"Animals in the Soil" PPT courseware of the land where plants live:

"Animals in the Soil" PPT courseware on the land where plants live. Explore the characteristics of earthworms adapting to life in the soil. 1. Observe the morphological structure of earthworms. 2. Think about where the home of earthworms is? Earthworms live in moist, loose soil rich in organic matter. Earthworms are in the soil during the day...

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Update Time: 2024-11-22

This template belongs to science courseware People's Education Press third grade science volume 2 industry PPT template

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