Is the seven star ladybug a beneficial insect or a pest

Beneficial insects: Insects that perform activities that are beneficial to other organisms. The criteria for defining beneficial insects are quite subjective: humans tend to measure the contribution of a particular species of insect to humans to determine whether it is beneficial or not.

The seven-star ladybug is a beneficial insect.

Although both adults and larvae feed on aphids, the feeding methods are different due to different insect states and different mouthparts structure. When adults feed, they usually bite the aphid, and after simple chewing with their mouthparts, they swallow the aphid's body and appendages completely. Older larvae feed in much the same way as adults.

However, due to their small mouthparts and poor swallowing ability, the first instar larvae often bite a hole in the aphid's body to suck the juice, and finally leave the aphid body shell. An adult of the seven-star ladybug eats an average of 100-120 cotton aphids, 147 vegetable aphids, and 59 apricot aphids a day. The amount of aphids eaten by larvae varies according to the size of the instar, with less snacks in the instar and more in the instar period.

In general, there are more than 5,000 extant known species in the ladybugidae family, and most of them are predatory, such as the ladybug subfamily, the small hairy ladybug subfamily, the helmet-lip ladybug subfamily, and the cryptotibial ladybug subfamily. A small number of species of the ladybug subfamily are fungivorous and feed on molds.

The rest is the subfamily of plant-eating ladybugs, which is characterized by hairy body surface and large body size (compared to the subfamily Ladybuge minoridae). The common species mostly feed on Solanaceae.

Seven-star ladybug: Seven-star ladybug is a predatory insect of the Coleoptera ladybug family, a beneficial insect, and the adult can prey on wheat aphid, cotton aphid, locust aphid, peach aphid, scale insect, tick and other pests, which can greatly reduce the damage of trees, melons and fruits and various crops from pests.

The above two points understand whether the seven-star ladybug is a beneficial insect

Common ladybugs include two-star ladybugs, six-star ladybugs, seven-star ladybugs, twelve-star ladybugs, thirteen-star ladybugs, red star ladybugs, big red ladybugs, etc., all of which are beneficial insects, all of which are our friends. The larvae of these ladybugs can also prey on aphids, scale insects, ticks, etc., and other small insects. Only the eleven-star ladybug and the twenty-eight-star ladybug are pests and are our enemies.

A simple way to identify it is that the surface of the elytra is very delicate, particularly smooth, and shiny and shiny, which belongs to beneficial insects. Anyone who has dense fine hairs on its elytra is a pest. It doesn't matter what color their elytra are or what markings they have.

What are the characteristics of the seven-star ladybug? Why is it said to be a beneficial insect and is called a live pesticide.

The seven-star ladybug is a predatory insect of the family Coleoptera, its body is like a half ball, and its black wings are orange. The antennae are very short, not too obvious, its feet are under the big wings, its mouthparts have the ability to chew food, because its wings have seven black dots, so people call it the seven-star ladybug, the seven-star ladybug is a beneficial insect, the adult can prey on wheat aphid, cotton aphid, locust aphid, peach aphid, scale insects, ticks and other pests, can greatly reduce the damage of trees, melons and fruits and various crops suffered by pests, is called "live pesticide", widely distributed in various parts of our country. In the southern part of North China, it is commonly known as "Sister Hua".

The seven-star ladybug has to go through four different stages of development in its life: egg, larva, pupal and adult. The adult worms of the seven-star ladybug should be controlled between 20-25 and the relative humidity should be 70%-80% when the adult is egg-laying, and the temperature can be raised at 25°. However, it is better to raise larvae at an average temperature of about 20.

The seven-star ladybug is a predatory insect of the family Coleoptera, its body is like a half ball, and its black wings are orange. The antennae are very short, not too obvious, its feet are under the big wings, its mouthparts have the ability to chew food, because its wings have seven black dots, so people call it the seven-star ladybug, the seven-star ladybug is a beneficial insect, the adult can prey on wheat aphid, cotton aphid, locust aphid, peach aphid, scale insects, ticks and other pests, can greatly reduce the damage of trees, melons and fruits and various crops suffered by pests, is called "live pesticide", widely distributed in various parts of our country. In the southern part of North China, it is commonly known as "Sister Hua".

The seven-star ladybug has to go through four different stages of development in its life: egg, larva, pupal and adult. The adult worms of the seven-star ladybug should be controlled between 20-25 and the relative humidity should be 70%-80% when the adult is egg-laying, and the temperature can be raised at 25°. However, it is better to raise larvae at an average temperature of about 20.

Morphological characteristics. The body is oval, with an arched back and a watery scoop shape. The head is black, the compound eyes are black, and each has 1 pale yellow spot in the medial depression. Antennae brown.

Mouthparts black. The upper extra side is yellow. The dorsal plate of the prothorax is black, and each of the anterior upper corners has a large, nearly square pale yellow ground.

Small shield black. elytra red or orange-yellow, with 7 dark spots on both sides; The base of the wings has 1 triangular white ground on each side of the small shield. The abdomen and feet are black.

The seven-star ladybug is a beneficial insect. Adults can prey on wheat aphids, cotton aphids, locust aphids, peach aphids, scale insects, ticks and other pests, which can greatly reduce the damage of trees, melons and fruits and various crops to pests, and are known as "live pesticides", which are widely distributed in various parts of China. In the southern part of North China, it is commonly known as "Sister Hua".

Its body is like a half-ball, and its head is black and its wings are orange. The antennae are short and not very obvious, its feet are under large wings, its mouthparts have the ability to chew food, and because its wings have seven black dots, it is called the seven-star ladybug.

The seven-star ladybug has a life span of nearly 80 days and can feed on tens of thousands of aphids. The seven-star ladybug is non-toxic and harmless to humans, animals and natural enemies, has no residue, and does not pollute the environment.

Seven-star ladybugs have a strong ability to defend themselves. There is a kind of "chemical**" on the joints of its 3 pairs of thin feet, and when it encounters the invasion of enemies, it secretes an extremely unpleasant yellow liquid, which makes the enemy retreat and flee in a hurry because he can't stand it.

The seven-star ladybug is a beneficial insect. The common seven-star ladybug in everyone's life is actually a beneficial insect, because its adults can prey on pests, so as to avoid the "poisoning" of trees and other crops by pests, so it is also called "live pesticide".

Because there are so many types of ladybugs, ladybugs in life are actually both harmful and beneficial.

So here are a few kinds of ladybugs that everyone is very confused about.

1. Eggplant 28 star ladybug: it is actually a pest, literally, you can guess that it is a plant-eating ladybug, its host plant is generally potato, tomato, eggplant and other solanaceae, and winter melon, cucumber and other cucurbitaceae.

2. Ten star ladybugs: This ladybug is also a pest, their adults and larvae will eat the leaves of plants, and the leaves that are eaten will generally show holes or gaps, and even eat up the entire leaves of the plant and leave only the leaf veins.

3. Potato ladybug: Don't look at its name as if it is harmless, in fact, this ladybug is also a pest, its adults and larvae will eat the mesophyll of the leaves, so that it leaves only the epidermis, and in severe cases, they will make the plant leaves only leave the veins.

5. Heterochromatic ladybug: This name may be very aggressive, but in fact, it is a beneficial insect, and they feed on cotton aphids.

6. Tortoise ladybug: This ladybug is actually a beneficial insect, which generally feeds on planthoppers, leafhoppers, aphids and other pests.

Which ladybugs are pests?

1. Solanaceae: The parasitic plants of Solanaceae are potatoes, eggplants, tomatoes, green peppers and other Solanaceae vegetables and cucumbers, winter melons, loofahs and other cucurbitaceous vegetables, in addition to harming beans, nightshades, sour pulp, mandala, tobacco, etc., adults and larvae eat mesophyll, the residual epidermis is reticulated, and the whole leaf is eaten up when it is serious.

2. Ten-star ladybug: Adults and larvae of ten-star ladybug feed on leaves, and the leaves are pore or notched, or the leaves are eaten up and only the leaf veins are left, and the larvae burrow into the soil to pupate after they are old, and the adults move to the host after the feathering, mainly eating grapes, wild grapes and five-berry plants.

3. Potato ladybug: Potato ladybug adults and larvae peel off the mesophyll on the back of the leaf, leaving only the epidermis, forming many irregular translucent fine concave lines, such as the bottom of the basket, and can also eat the leaves into holes, and even only the leaf veins remain, when the affected leaves are dry and brown, the whole plant dies, and the fruit is often cracked, the tissue becomes stiff, rough, and bitter, and cannot be eaten.

Which ladybugs are beneficial insects?

1. Seven-star ladybug: Seven-star ladybug is a beneficial insect, adults can prey on wheat aphid, cotton aphid, locust aphid, peach aphid, scale insects, ticks and other pests, can greatly reduce the damage of trees, melons and fruits and various crops suffered by pests, is known as "live pesticide", widely distributed in various parts of China.

2. Heterochromatic ladybug: In addition to preying on cotton aphids, the adults and larvae of heterochromatic ladybugs can also prey on the eggs and young larvae of cotton bollworm, the adults can prey on about 70 cotton bollworm eggs on average every day, and the larvae do not prey on cotton bollworm eggs, and the first hatching larvae of cotton bollworm are 70 adults and 69 instar larvae.

3. Six ladybugs: Six ladybugs, also known as six-spotted moon ladybugs, have black body color, white longitudinal spots on the back of the body, feed on a variety of aphids, and there are more than 20 kinds of adult spot type variations, but the markings on the dorsal plate of the anterior thorax are relatively stable, generally distributed in flat land to low-altitude mountainous areas, and are commonly found on plants with aphids, and can be seen throughout the year.

4. Tortoise ladybug: Tortoise ladybug is a beneficial insect that will prey on aphids, leafhoppers, planthoppers, etc., and prey on the eggs and young young nymphs of aphids, cotton bollworms and other pests in cotton fields. At the same time, 7 September is also an important natural enemy in the orchard, feeding on aphids, leafhoppers, planthoppers and other pests in the apple orchard.

5. Ladybug macroscapula: The adult body of Ladybug macrocarpus is millimeters long, the periphery is oval or oblong-ovate, the dorsal hemispherical shape, the ventral surface is flattened, the number is scarce, preys on scale insects, and the adults and larvae prey on sugarcane cotton aphids, distributed in Guangxi, Fujian, Taiwan, Guangdong, Guizhou, Yunnan and other places.

6. Australian ladybug: Australian ladybug is an agricultural beneficial insect, native to Australia, likes shaded environment, has the habit of suspended animation, and often concentrates on feeding female adults at the beginning of hatching, and gradually disperses later. At present, more than 50 countries have introduced Australian ladybugs to control the blowing scale, and China has introduced the species since 1955 to carry out research and utilization, which has effectively controlled the occurrence of the blowing scale, and is known to be distributed in the citrus producing areas in the south.

The seven-star ladybug is a beneficial insect. Seven-star ladybug is a predatory ladybug, because of the body surface has seven stars, mainly feed on aphids, sometimes also feed on small soil particles, fungal spores and some small insects, and often feed on plant pollen in autumn, which is defined as a beneficial insect by people.

Seven-star ladybug. Ladybug is mainly widely distributed in Africa, Europe, and Asia. It is distributed in Northeast, North, Central, Northwest, East and Southwest China in China.

The seven-star ladybug has to go through four different stages of development in its life: egg, larva, pupal and adult, and the development period of each insect state is mainly affected by food and temperature.

After the seven-star ladybug multiplies, it can be released into the field to help humans eradicate aphids and scales. For example, when there are a large number of aphids in the cotton field, the seven-star ladybug can be scattered into the cotton field, and it can eat the aphids.

The seven-star ladybug is a beneficial insect. Its adults can prey on wheat aphids, cotton aphids, locust aphids, peach aphids, scale insects, ticks and other pests, which can greatly reduce the damage of trees, melons and fruits and various crops from pests, and are known as "live pesticides", which are widely distributed in various parts of China. In the southern part of North China, it is commonly known as "Sister Hua".

Moreover, the seven-star ladybug is non-toxic and harmless to humans, animals and natural enemies, and has no residue and does not pollute the environment.

The seven-star ladybug is a predatory insect of the family Coleoptera, with a body like a half ball and black wings on its head. The antennae are short and not very obvious, its feet are under large wings, its mouthparts have the ability to chew food, and because its wings have seven black dots, it is called the seven-star ladybug.

The seven-star ladybug has a life span of nearly 80 days and can feed on tens of thousands of aphids. The seven-star ladybug has a strong ability to defend itself, and although its body is only the size of a soybean, many strong enemies are helpless against it. There is a kind of "chemical **" on the joints of its 3 pairs of thin feet, and when it encounters the invasion of enemies, it secretes an extremely unpleasant yellow liquid, which makes the enemy retreat and flee in a hurry because he can't stand it.

The seven-star ladybug is a beneficial insect. The seven-star ladybug is a predatory ladybug that is defined as a beneficial insect because it has seven stars on its body and feeds on other insects. Pests are insects that eat vegetarian and crop-eating insects.

Beneficial insects are insects that eat meat and eat pests. In fact, this is the definition of human beings, and insects only follow their own evolutionary habits to feed and survive.

The seven-star ladybug has to go through four different stages of development in its life: egg, larva, pupae and adult, and the development period of each insect state is mainly affected by food and temperature. Ladybird is a migratory insect, and the foraging behavior of adults and larvae belongs to the transition between wide-area search and regional centralized search behavior. The ladybug feeds mainly on aphids, sometimes small soil particles, fungal spores, and some small insects, and often pollen from plants in autumn.

The habits of the seven-star ladybug

1. Feeding habits: It should be noted that the adult of the seven-star ladybug has a long lifespan, an average of 77 days, and preys on the larvae and eggs of aphids, leaf mites, whiteflies, corn borers, aphids, and cotton bollworms with adults and larvae. The amount of food eaten by the seven-star ladybug is related to the temperature and prey density.

Under the condition of high temperature, the activity ability of the seven-star ladybug and prey is affected, and the predation rate is increased.

2. Self-defense ability: It has a strong self-defense ability, and when it encounters the invasion of the enemy, its foot joints can secrete a very unpleasant yellow liquid, so that the enemy can not stand it and retreat and flee in a hurry. It also has the ability to set up death, when it encounters strong enemies and dangers, it immediately falls from the tree to the ground, shrinks 3 pairs of thin feet under the stomach, pretends to be dead and lies down, hiding from the enemy and surviving.

3. Do not interfere with each other: the boundaries between beneficial insects and pests are clear, do not interfere with each other, do not intermarry with each other, and maintain their traditional habits, so no matter how many generations they have been handed down, they will not produce "mixed breeds", nor will they change their traditional habits.