CATDOLL : CATDOLL: What are some common beneficial insects?

What are the common beneficial insects?

Common beneficial insects include dragonflies, mantises, spiders, ladybugs, frogs, etc.

1. Dragonfly

Dragonflies are carnivorous insects that feed on mosquitoes, flies and other small insects. A large green dragonfly, commonly known as the "green-headed dragonfly", can eat about 2,000 aphids and other small flying insects in a day. It eats mosquitoes, flies and the like, of course, and it welcomes all small moths and insects that can fly and crawl. It eliminates pests for humans in such large quantities that it deserves to be called a "beneficial insect."

2. Praying Mantis

The mantis is a veritable beneficial insect. It is a carnivorous insect that feeds on more than 60 kinds of pests, including cotton aphids, pink bollworms, corn borers, cabbage borers, cabbage worms, beetles, flies, grasshoppers, etc. The mantis is also the mortal enemy of locusts.

3. Spider

Spiders are the most abundant predatory natural enemies in terrestrial ecosystems, and their role in maintaining the stability of agricultural and forestry ecosystems cannot be ignored. The body length is 1 to 90 mm, and the body is divided into two parts: the cephalothorax (front body) and the abdomen (back body). The cephalothorax is covered with a carapace and a sternum. The cephalothorax has two pairs of appendages. The first pair is the chelicerae, which have chelicerae and venom gland openings at the tips of the chelicerae. The chelicerae of the suborder Orthognatha move forward and backward, while those of the suborder Pinnipedia move sideways and toward each other.

4. Seven-spotted ladybug

The seven-spotted ladybug is the most common ladybug in Europe. Its elytra are red, but there are three black spots on each side, and another black spot in the middle of the two elytra, for a total of seven black spots, which is why it is named after this. The ecological distribution of the seven-spotted ladybug is very wide, and it can be found almost wherever there are aphids.

5. Frog

Frogs often live in rivers, ponds, and rice fields. They mainly move in the grass near the water, and sometimes hide in the water. They are mostly active at night, and feed mainly on insects, as well as some snails, snails, shrimps, and small fish. Most of the insects they eat are agricultural pests.

Additional information:

Main types

Beneficial insects refer to insects that are beneficial to other organisms. Bees, silkworms, ladybugs, mantises, hoverflies, parasitic wasps, lacewings, etc. are all beneficial insects.

Biological control is a method of using the natural enemies of pests to suppress pests, because pests themselves are food for many insects and other animals, and are also hosts for many microorganisms. The reason why some pests cannot survive in large numbers in old production areas is sometimes not due to unsuitable weather, lack of or insufficient food, or low reproduction, but the result of being preyed on or parasitized by natural enemies, resulting in a large reduction in number. The natural enemies of pests, that is, beneficial insects, can be simply divided into two categories: predatory or parasitic insects.

Many insects are considered beneficial because they prey on or parasitize other insects that destroy crops and stored products. Predatory insects such as hunter bugs and assassin bugs, when they have found and eaten their prey, immediately move on to another meal. Parasitic insects may also kill their host insects, but only after developing for a period of time in or on the host. By far the most important beneficial insects are parasitic insects, which are 64 genera of bees and 37 genera of flies. Among the predatory insects, the family Coccinellidae (seven genera) is the most important.

There are many predatory or parasitic beneficial insects in nature. These insects prey directly on pests, or lay eggs in pests to parasitize and kill them. It is estimated that about 28% of the species in the class Insecta are predatory and 2.4% are parasitic, which together account for more than 30% of the insect species. Most of the insects belonging to this category are included in the five orders of Hemiptera, Neuroptera, Coleoptera, Hymenoptera and Diptera, among which Coleoptera, Hymenoptera and Diptera are the most important.

Among predatory insects, there are mantises, dragonflies, pig bugs, pseudo-pig bugs, flower bugs, lacewings, walking beetles, ladybugs, wasps, mud wasps, robber flies, aphid flies, etc. For example, Australian ladybugs and big red ladybugs prey on cottony scale insects, two-spotted ladybugs can eat arrow-pointed scale insects, small black ladybugs prey on citrus red spiders, and jumping wasps commonly seen in citrus orchards eat cottony scale insects. The parasitism rate is about 80% in Zigui and Longjiang, Hubei. Among parasitic insects, there are ichneumon wasps, small cocoon wasps, small wasps, parasitic flies, etc. The trichogrammatid wasps currently being promoted in various places are one of them.

The order Hymenoptera includes bees and ants. They are small to medium-sized, with chewing or sucking mouthparts. In most species, the thorax and abdomen are contracted into a waist, called the abdominal stalk. The wings are membranous. Female insects have well-developed ovipositors, which are often saw-shaped or needle-shaped, and some become stingers. They are used for self-defense. They are holometabolous, and the larvae are usually legless, but leaf-feeding pests, such as sawflies, have 3 pairs of thoracic legs and 6 to 8 pairs of abdominal legs, which are very similar to the larvae of Lepidoptera. The pupa is a free pupa. The main species that harm fruit trees include pear fruit wasps and pear stem wasps. Most of the Hymenoptera insects are parasitic beneficial insects, such as Ichneumonidae, Braconidae, Microcera, Trichogrammatidae, etc., and they should be protected and utilized.

Function and significance:

Beneficial insects can help crops grow. There are also many beneficial insects, such as dragonflies, mantises, ladybugs, trichogrammatids, etc., which can also kill pests, using insects to control insects, which is "biological control".

Some can directly improve environmental sanitation. Earthworms (not insects) use domestic garbage, dead grass and leaves, biological feces, etc. as food. After they eat domestic garbage and other waste, the feces they excrete become fertilizer in the soil. Therefore, in terms of improving environmental sanitation, earthworms are both "cleaners" and "small fertilizer factories."

Being able to identify these insects and understand their role in regulating pest populations is vital for farmers and those involved in crop production. This knowledge allows them to make the most of beneficial insects in their overall pest control strategy.

Reference source: Baidu Encyclopedia: Beneficial Insects

Bees, spiders, dragonflies, frogs, lizards, earthworms, trichogrammatids, mantises, seven-spotted ladybugs, silkworms,

The first floor, swallows are beneficial insects? Look carefully, the last word is "insect"! ! Swallows are beneficial insects, then what are beneficial birds? Is it frogs?

Common beneficial insects: earthworms (loosen the soil), bees (make honey), mantises (eat grasshoppers), ladybugs (eat aphids), dragonflies (eat flies and mosquitoes). These are the more common ones.

Common beneficial insects include frogs, dragonflies, bats, lizards, and lizards.

Dragonfly, earthworm, seven-spotted ladybug, earthworm, trichogrammatid, mantis,

Are leeches beneficial insects or pests?

If they are not used as medicine, leeches are pests. The most troublesome thing about leeches is how to kill them. Leeches are like earthworms. Every time they are cut into pieces, a new leech will be formed. Therefore, leeches cannot be killed by chopping or cutting with a knife. Because they are soft-bodied animals, they cannot be killed by stepping on them with your feet. It is said that the only way to kill leeches is to burn them in firewood.

Leeches

yes

beneficial insects

It is not a pest, it can be used as medicine, and Chinese medicine calls it

leech

It is often used to promote blood circulation and remove blood stasis, and has the effect of unblocking blood vessels.