Aphids or other larvae, and why are aphids parasitic?

Aphids are largely eliminated. The landlord can observe their movement, if they usually lie still on aquatic plants or fish tanks, and swim forward quickly after being frightened and have a slender body, they are water flies (dragonfly larvae); If the body is close to an oval shape and swims in the water all the time, it is generally a daphnia (aquatic crustaceans, different from insects); If the body is very elongated, the body surface is smooth and gray, the tail is on the surface of the water, suspended in the water, and the body shakes and moves, it is a stagger (larvae of mosquitoes such as Culex mosquitoes); If the body is elongated, red, immersed in water, and the body moves in an S-shape, it is a bloodworm (midges larvae); If the whole body is black, elongated, with a thick abdomen, attached to objects, stops near the surface of the water, twists the body to move, and moves very slowly, it is a moth larva; If the whole body is black, the cephalothorax is large, the abdomen is bent under the cephalothorax, floating on the water, and the abdomen is stretched and bent when frightened, it is a mosquito chrysalis; If the body is usually translucent and elongated, one section is attached to the object, and many tentacles are radially protruding from the other end, and the whole body shrinks into a small mass when frightened, it is a hydra (coelenterate); If the body is small, white, with feathery organs on both sides, which swing back and forth during movement, and have an elongated tail, it is a crustacean with a problem; If the body is elongated, with three thin thin skins dragging on the tail, and swims only by the abdomen swing (only the abdomen, unlike the mosquito larvae), then it is a damselfly juvenile (damselfly is a general term for the insects of the order Dragonfly, and is a close relative ......of the dragonfly).

The aquatic environment is like the terrestrial environment, with a variety of organisms. There are more aquatic animals. It's best to post a picture and take a look.

Because aphids are stinging pests, they often gather in leaves, young stems, flower buds, apical buds and other parts, stinging and sucking sap, and sucking a large amount of sap from the leaves and stems of plants, so their relationship with green plants is parasitic.

Aphids generally grow in the soil and leaves of potted plants. Adults of aphids have wings and fly to the damp and dark places of potted plants, laying a large number of eggs in the soil, young stems, leaves, etc., which will break out after a period of time.

Indoor potted plants are easy to be infected by aphids, to regularly check whether there are aphids in the room plants, leaf surface, leaf back, leaf axils and flowers should be checked clearly, once the indoor plants are found to be infected with aphids, they should be cleaned up as soon as possible, the aphids grow quickly, if not removed in time, other plants will be infected, and more attention should be paid to.

If you want to prevent aphid infestations, you can buy medicinal alcohol and insecticides at the store. Spraying both evenly next to the roots of the plant's flowers also prevents insect infestation. It kills insects and eggs that are not visible to the naked eye.

You can also cover the soil surface of the potted plant with a layer of river sand, and then sprinkle grass ash on the soil, which can play a role in insect control and fertilization. Aphids grow in potted plants because the potted plants themselves contain insect eggs, and as long as the soil is disinfected regularly, the purpose of insecticide and insect control can be achieved.

Aphids, also known as greasy insects and honey worms, are a type of herbivorous insects.

Aphids, also known as greasy insects and honey worms, are a class of herbivorous insects, including all members of the family Aphidoidea. There are about 4,400 species of aphids in 10 families, most of which belong to the family Aphididae.

Aphids are also one of the most destructive pests on the planet. About 250 of these are pests that are serious for the agroforestry and horticulture industries.

Aphids vary in size, ranging from one to ten millimeters in length. The natural enemies of aphids are ladybugs, aphid-eating flies, parasitic wasps, aphid midge larvae, crab spiders, lacewings, and entomopathogenic fungi (including Metarhizium aeruginosa).

Aphids are widely distributed worldwide, but are mainly concentrated in temperate regions. In addition, species diversity is much lower in the tropics than in temperate zones. Aphids can migrate remotely, mainly by drifting in the wind; For example, the lettuce aphid is thought to have spread from New Zealand to Tasmania in this way.

Some human activities can also help with the migration of aphids, such as the process of transporting plants that attach aphids.

The body length is millimeters, most about 2 millimeters. Sometimes powdered with wax, but lacking wax tablets. antennae 6-segmented, rarely 5-segmented, rarely 4-segmented, sensory circular, rarely elliptic, terminal end often longer than base.

The eyes are large, many small, and there are often protruding 3-small eye tumors.

The abdomen of the aphid has a tubular protrusion (abdominal canal), the aphid has a pair of abdominal canals, which are used to discharge the defense fluid that can harden rapidly, and the composition is triglycerides, the abdominal canal is usually tubular, often longer than wide, and the base is thick, sucking plant sap, which is a large pest of plants. It not only hinders the growth of plants, forms galls, spreads viruses, but also causes deformities of flowers, leaves and buds.

The life history is complex, wingless females camp parthenogenesis in summer camps, ovoviviparous, and give birth to young aphids. When the aphids on the plant are too dense, some grow two pairs of large membranous wings in search of a new host. Female and male aphids appear in late summer, and after mating, the female aphids lay eggs, overwinter with their eggs, and eventually produce a dry mother.

Egg-free period may occur in warm regions. Aphids have wax gland secretions, so many aphids look like white wool balls.