CATDOLL : CATDOLL: Are locusts beneficial insects or pests?

1. Are locusts beneficial insects or pests?

Locusts are agricultural pests.

Locusts (called grasshoppers in some places) are a kind of pest of the order Orthoptera. There are many species. According to statistics, there are more than 10,000 species of locusts in the world, of which about 300 species can cause harm to agriculture, forestry and animal husbandry.

During the normal planting process, we will encounter many locusts (according to historical records, the common locusts in my country are the East Asian migratory locust, the Asian migratory locust and the Tibetan migratory locust). For example, when planting common crops (wheat, corn, rice, soybeans, etc.), locusts will appear in the fields, but the number is very small compared to locust plagues.

The harm caused by locusts

Locusts mainly include migratory locusts and ground locusts. Ground locusts have a wide range of food and can feed on leaves, tender stems, flower buds and tender fruits of wheat, rice, millet, corn, beans, tobacco, reeds, vegetables, fruit trees, trees and weeds. They bite the leaves into notches or holes. When a large outbreak occurs, they can eat the crops down to bare stalks or eat them completely, causing serious economic losses.

Locusts mainly feed on plants of the Poaceae and Cyperaceae families. They prefer weeds such as reeds, barnyard grass and red grass. They also like to eat cultivated crops such as wheat, corn, sorghum, rice, millet and sugarcane. When there is a large outbreak and food shortage, they can also harm crops such as cotton, soybeans and vegetables.

2. Which insects are beneficial insects and pests?

actually

Pests or Beneficial Insects

Humans classify insects according to their own needs and interests.

Insects are generally divided into beneficial insects, pests and neutral insects.

Beneficial insects, such as parasitic wasps, many of which can parasitize the eggs and larvae of pests

Pests, such as cockroaches, most flies, they are all sanitary pests, as well as lice, locusts, etc.

Neutral insects, such as earwigs

Also, insects have the following characteristics, don't confuse them

1) The body is clearly divided into three parts: head, thorax, and abdomen, each of which is composed of several segments. The head is composed of 6 segments fused together, and there is no trace of segments in the adult. The thorax is composed of three segments: prothorax, mesothorax, and metathorax. The abdomen is composed of 3 to 12 segments, and most of them are 10 to 11 segments.

(2) Adults have three pairs of segmented legs, one on each of the three thoracic segments. (Animals with fewer than three pairs or more than three pairs of legs are not insects. This is the most obvious sign for identifying insects.)

(3) Most adult insects have two pairs of wings on their thorax. However, some species of insects have evolved to have only one pair of wings (such as mosquitoes and flies), and some species of insects have completely degenerated their wings (such as fleas and lice).

(4) Insects have a pair of segmented antennae on their heads, which serve as the sense of touch and smell and are used for exploring, finding food, determining direction and courting mates.

(5) Insects do not have bones in their bodies. Adult insects have a layer of outer shell on their bodies, called an "exoskeleton."

Are cicadas beneficial or harmful in the insect world?

For insects, beneficial insects and pests are just names imposed by humans according to their own needs. Every insect plays an extremely important role in nature, even mosquitoes and flies play a very important role in the ecological chain.

If we have to talk about beneficial insects, then the following insects are of certain benefit to humans: ladybugs, dragonflies, lacewings, mantises, ants, fireflies, and many more.

Beneficial insects and pests are the classifications given by humans to some insects, and the criteria for classification are mainly whether they are beneficial or harmful to human production activities and daily life. Usually pests mainly include some herbivorous insects such as cabbage worms, corn borers, loopers, aphids, cotton bollworms, caterpillars, pine caterpillars, beetles, twenty-eight-spotted ladybugs, etc., as well as some insects that directly endanger human health such as flies, mosquitoes, cockroaches, fleas, bedbugs, etc.

Beneficial insects are mainly carnivorous insects that feed on pests, such as ladybugs, mantises, dragonflies, parasitic wasps, etc. There are also some insects that can bring economic benefits to humans by collecting nectar for pollination or spinning silk to make cocoons, such as bees and silkworms.

Hey`````

Pests: locusts, mosquitoes, flies, grasshoppers...

Beneficial insects: dragonflies, bees...

Um, I can't tell.

There are many that are neither good nor bad```

Sissi`

3. Which of the silkworm moth, cockroach, mantis, fly, locust, and dragonfly are beneficial insects and which are pests?

Silkworm moth: Silkworms spin silk and are beneficial insects.

Mantis dragonfly: preys on pests, so it is a beneficial insect

The rest are pests.

Blattella is also known as cockroach, fly and locust are all pests.