Dragonflies and bees are pests, and dragonflies are beneficial or pests

Dragonflies are carnivorous and can prey on other insects and are often seen as beneficial insects; Adult butterflies can spread pollen, which is barely beneficial, but the larvae are herbivorous and more harmful, and butterflies are regarded as pests when considered; Moths are like butterflies; Flies and mosquitoes are sanitary pests that can spread diseases and belong to pests; Bees have a more prominent ability to spread pollen, and they can produce honey, so they are beneficial insects!

So, butterflies, moths, flies, mosquitoes are pests.

Dragonflies are beneficial insects that prey on a variety of agricultural, forestry and animal husbandry pests such as flies, mosquitoes, leafhoppers, midges and small butterfly moths, and are beneficial insects to humans.

Dragonfly insects are abundant in resources and play an important role in many ways. First of all, as a representative class of aquatic organisms, its larvae can monitor water pollution, and some species contain some active substances that can be used as medicinal materials, and their bodies are rich in protein, amino acids, minerals, etc.

Dragonflies' amazing ability to hunt

We know that due to long-term co-evolution, any carnivore will not have a high success rate of predation, because the prey will become difficult for you to catch depending on your hunting characteristics.

Among mammals, the African spotted hyena may have the highest predation success rate, fighting collectively with a success rate of up to 85%, while those who fight alone have a surprisingly low success rate, which is only about 5% more successful than a tiger.

If you've ever seen the flight of mosquitoes dodging rain strikes on rainy days**, you'll be shocked by their ability to fly, but the strong have their own strong hands, and the typical prey of dragonflies is mosquitoes.

A dragonfly eats 30-100 mosquitoes a day, and they are single-working, catching mosquitoes in flight and eating mosquitoes in flight, and some studies have found that their hunting success rate is as high as 90%-95%. Probably no predator has a higher success rate than them, making them a highly successful species that can be found all over the world.

Of course, it is not a matter of one or two days for dragonflies to eat mosquitoes, but mosquitoes have no way to take them, so they can only deal with predatory pressure in another way, enhance their reproductive ability, and try to make dragonflies unable to eat them all. Dragonflies' success is not only due to their ability to fly, but also to their eyes, and if you look at the head of a dragonfly, you will see that their entire head is almost covered by eyes.

Their compound eyes have 30,000 facets, each of which carries information about the insect's surroundings, giving them near-360-degree vision (only behind them is a blind spot). This eye of a dragonfly is kind of like we're walking into a room with 30,000 surveillance screens, each screen is doing different things, and we certainly can't handle that huge amount of information, but they do.

This is one of the reasons why they successfully chase their prey, as well as avoid colliding with other insects in the air. Speaking of the predatory behavior of dragonflies, we must also mention their larvae, the larvae of dragonflies are flightless and live in water, but they are also a powerful predator.

Everyone praises dragonflies as beneficial insects, but their larvae are pests, and people call them "fish tigers" extremely harmful

The dragonfly flies in the air, but its larvae, on the contrary, must live in the water, and it is also particularly ferocious, and finally won the domineering title of "water tiger" and became a water tyrant!

The larvae of the dragonfly live in water, its scientific name is 水虿 (chài), which belongs to the order Dragonfly of the class Insecta, which is the name of the larvae of the dragonfly. Jing Hui Lu.

The body color of the water fly is generally dark green or dark brown, and it has no wings in the water and cannot reproduce. It's similar to the characteristics of the monkey, except that the monkey is hidden deep underground, and it becomes known after feathering.

Water flies will grow in the water for a long time in their lives, even the shortest, they have to grow in the water for two or three months, some need to grow for two or three years, and the longest one needs to grow for seven or eight years to fully mature.

Water flies grow in water for a long time, and it is not enough to drink water. But dragonflies like to eat meat (pests); Its larvae also love meat. Originally, its small body was also an "insect" that lived in the water, and it was reasonable that it should be eaten by fish.

However, it likes to lie in ambush under the silt or dead branches and leaves of streams or ponds, waiting for an opportunity to ambush small fish and shrimp that pass by it, and even tadpoles and other small insects in the water, and is a very fierce carnivore.

02 Hazards of water bugs.

The water fly especially loves to eat fish and shrimp, and its formation is often unavoidable, we often see the "sunny day water", in fact, it is a sunny day in the water to lay eggs, and its eggs hatch after the water is - water fly!

All water bugs often appear in areas with water, which is extremely harmful to aquaculture, and is extremely harmful to fish and shrimp seeds, causing great economic losses.

03Prevention and control of water bugs.

The water fly has a ferocious temperament, a water fly can eat 10 fish and shrimp of about 3 cm a day, and thousands of water fly are fatal to aquaculture. Therefore, if you want to breed fish fry, shrimp fry, etc., it is necessary to control the water bug.

You can use quicklime to clear the pond, and sprinkle 50 to 100 kg of quicklime per mu, which can effectively kill the water fly. At the same time, it can also be treated by light trapping and other methods.

04 Water is a delicacy.

The water fly is ferocious and abnormal, but it is not a threat to large fish, and it has also become a delicacy in the mouths of large carp, large grass carp, and large crucian carp. The water fly is just an insect that lives in the water, but it has not escaped the mouths of foodies.

It was also eaten, and it was a pity for the good people to throw away the large number of water flies trapped, and the gluttony of foodies eventually turned the water flies into a delicacy.

Dragonflies are beneficial insects, and they will help hail in rice fields to catch small late-attacking insects such as flies, mosquitoes, leafhoppers, and planthoppers to eat the bushes and protect crops.

Dragonflies are predatory source insects, and the objects of predation are basically pests that are harmful to hail and plums, such as butterflies, moths, flies, mosquitoes, locusts, etc. Therefore, dragonflies are natural enemy insects, insects that are beneficial to humans, and belong to beneficial insects

Dragonflies are beneficial insects, and dragonflies are an important class of natural enemy insects that are beneficial to humans.

Dragonflies generally prey on mosquitoes, midges and other small insects such as flies, bees, butterflies, moths, cicadas, etc., and some even fish. often male and female flocks, flying near water; After mating, females lay eggs in various environments, such as in water, aquatic weeds, and tree branches.

The dragonfly clicked on the surface of the lake for a while, and then flew to the shore to hunt the first mosquito on the shore, and soon, the mosquitoes were wiped out.

Composition: Yesterday afternoon when I came home from school, I did my homework first, and after I finished my homework, I went to the park next to my house to play alone. In the evening, the park is full of big dragonflies, like small planes flying in the air. Confusion.

I ran east and west, chasing dragonflies everywhere. I chased a pink dragonfly and fell to the ground, and I immediately caught it home.

When I got home, my mother asked me, "What did you do?" I said

Let's go catch dragonflies. I showed my mother the dragonfly I caught, and when my mother saw the dragonfly in my hand, she said to me kindly: "Dragonflies are beneficial insects, they eat mosquitoes and other harmful flying insects, they are good friends of human beings, and we should not harm them."

Listening to my mother's words, I lowered my head.

Later, I reluctantly released the dragonfly back into the sky. Seeing this beautiful dragonfly flying freely in the air, I was happy again, and I thought that the little dragonfly would be able to see its mother again.

Dragonflies will catch pests in farmland, grass, woods and other places, dragonflies are carnivorous insects, generally prey on flies, mosquitoes, leafhoppers, midges and small butterfly moths and other agricultural, forestry and animal husbandry pests, is beneficial to human beings a class of important natural enemy insects.

Dragonflies are also known as lamps, cockroaches, dragonflies, flies, and beneficial insects. Large, wings long and narrow, 3 eyes, 1 pair of antennae, thin and short, chewing mouthparts, abdomen elongated, flat or cylindrical, with anal appendages at the end, legs thin and weak, with hook spines. The larvae develop in the water, breathe with the rectal tracheal gills in the water, and generally have to go through more than 11 molts, and it takes 2 or more years to crawl out of the water along the aquatic weeds, and then finally molt and feather into adults.

In addition to a large number of mosquitoes and flies, some can also prey on butterflies, moths, bees and other insects, and the way dragonflies catch food is very different from other insects. When it flies in the air, if it finds that there is food in front of it to catch, it will immediately open its six legs forward, accelerate towards the flying small insects and rush over, and the small insects will catch the "cage" formed by closing the six legs.

Dragonflies like to prey on flying insects, in addition to a large number of mosquitoes, flies and other harmful insects, some can also prey on butterflies, moths, bees and other insects, as long as it is a small flying insect type of pests dragonflies will eat. A large green dragonfly, commonly known as the "green flute", can eat about 2,000 aphids and other small flying insects a day.

1. What pests do dragonflies eat.

Dragonflies generally fly in ponds or rivers, larvae (larvae) develop in the water, and adults prey on flying insects, mainly feeding on mosquitoes and other insects that are harmful to humans. Early dragonfly larvae feed on aquatic animals such as small crustaceans and protozoa, and later larvae feed on midger larvae, aquatic beetles and snails, and even small fish, and the prey of the adult insects is usually flying insects, but some often eat up to 60% of their body weight.

2. How much dragonflies eat.

The amount of food eaten by dragonflies is also very amazing, a kind of green dragonfly commonly known as "green head flute" can eat about 2,000 aphids and other small flying insects a day, it is said that a horse dragonfly can eat nearly 1,000 small flying insects in a day, and can eat 40 flies or 840 mosquitoes in one hour. At the same time, dragonfly larvae also love to eat mosquito larvae, a dragonfly larvae can eat more than 3,000 mosquito larvae a year.

Bees don't eat dragonflies.

Honeybee belongs to the general term of Hymenoptera, Slender Lump Suborder, Pinoctinaceae, Honeybee Family, and Honeybee Family, and is an important group of Hymenoptera.

Bees live entirely on flowers, including pollen and nectar, and are sometimes brewed and stored as honey. There is no doubt that bees pollinate the flowers as they collect them, and when they collect pollen from among the flowers, they drop some pollen onto the flowers. These dropped pollen are important because they often cause cross-pollination of plants.

The actual value of honey bees as pollinators is greater than the value of honey and beeswax canton.