As we all know, frogs mainly feed on agricultural pests. Through observation, we know that whether it is the borer moths that can fly, the locusts that are good at jumping, the bollworms that hide in the leaf rolls, the cotton bollworms that burrow into the cotton peaches, or the mole crickets that are hidden in the underground burrows, as long as they come out and move around, the frogs will catch them right away. The agricultural pests that frogs prey on are many and varied. According to statistics, a frog eats about 60 pests a day, and a frog can eliminate more than 10,000 pests in the six or seven months from spring to fall, which is a considerable number.
"In the fragrance of rice blossoms, we can hear the sound of frogs". This is a famous line immortalized for ages in the words of "Moon on the Western River" written by Xin Qiji, a famous lyricist of the Southern Song Dynasty. More than 800 years ago, the ancients knew that if there were many frogs, there would be fewer insect pests and a good rice harvest. Today, in the 21st century, we should know that frogs are the natural enemies of agricultural pests and are very beneficial to human beings, so we must protect frogs in nature. If we kill the frogs, it will cause a large number of agricultural pests to multiply, and then we must apply a large number of pesticides to eliminate the pests, which not only destroys the ecological balance, but also pollutes the environment. Therefore, strictly prohibit the predation of frogs, the protection of natural enemies is the biological control of agricultural pests, to ensure the normal growth and development of crops, saving agricultural capital, and effective measures to protect the environment. The kind of greed for small profits, to the great harm of the frog catching behavior, should be strictly prohibited
Frogs refers to frogs (black spotted frogs), toads (commonly known as toad) and other amphibians without tails, they are classified as belonging to the phylum of chordata, the vertebrate subphylum, the amphibian class. Due to the bare skin, can not effectively prevent the evaporation of water in the body, so they can not leave the water or humid environment throughout their lives, afraid of drought and cold. So most of them live in tropical and temperate rainy areas, and there are very few species distributed in the cold zone. There are about 130 species of frogs in China, and almost all of them are capable of eliminating forest and farmland pests.
The frogs commonly found in farmland include the black-spotted frog, the zephyr frog, the golden-line frog, and the flower-backed toad, among others. The bullfrog introduced from Cuba can be regarded as a "giant" among frogs, with a body length of up to 20 centimeters. Its mooing sound is very similar to that of a cow, so it is called a bullfrog. In fact, China also has a very large body frogs, such as living in the paddy fields of Jiangnan tiger frogs, more than 12 centimeters long, the sound is like a dog barking. Spiny frogs living in the mountain streams of Jiangnan, also known as "stone chicken", also has a body length of about 12 centimeters. So how big is the smallest frog in China? Only slightly larger than a broad bean. Early spring in February, when the north is still snow and wind, Hainan Island has been flowers blooming. At this time, during the day near the rice paddies can be heard "croaking" sound. This is one of the smallest frogs - Ji frog in courtship. It is only 2.5 centimeters long, and when it chirps, a large air bubble - the song sac - bulges out of the lower part of its throat. Sometimes, you can hear a squeaking sound coming from between the water plants, which is the song of a small, hard-to-find frog, the floating frog. Floating frogs are gray, only 2 centimeters long, often floating in the water between the grass, only showing a head. Whenever there is a movement, they immediately dive and escape. Don't look at these frogs small body, they are small pests and termites natural enemy. Tree frogs in our country about a dozen species, they are light and thin, finger end of the sucker, good climbing tall tree trunks or short bushes, body color and the surroundings of the same.
Reproduction in frogs is characterized by dioecy, fertilization in water, and oviparity. Reproduction occurs around mid to late April each year. During reproduction, frogs have a very special phenomenon - holding pairs. It should be noted that the frogs are not mating, but only a part of the reproductive process, studies have shown that if the male and female frogs are artificially separated (i.e., there is no process of holding pairs), the female frogs can not excrete egg cells even in the reproductive period of the frogs. The biological significance of holding pairs is that the female frogs can be induced to ovulate by holding pairs. Generally, frogs lay their eggs and fertilize them in water, and the eggs hatch into tadpoles, which live in the water and then become young frogs that land and move around. However, tree frogs lay their eggs in a different way. Spotted-legged tree frogs produce eggs that look like white soap suds and cream, which stick to the water plants. The most interesting is the Emei Tree Frog, which lays its eggs on leaves at the water's edge, where the eggs develop, then fall into the lake and continue to develop. Another example is the pleasantly chirping lyre-bouncing frog, which also builds a mud nest before laying its eggs, and then lays its eggs in it. Some frogs that are tree frogs do not go up into the trees, but live in the water. Some tree frogs, such as the red-webbed tree frog and the black-webbed tree frog, have broad webbing between their fingers and toes, and are able to glide from high branches to low places with their webbing, so they are also called flying frogs. Besides tree frogs, there are also rain frogs and turbulent frogs that have suckers. Among them, the turbulent frogs are more special, they like to live in the turbulent waters, and they can cross the rapids and climb up the rocks with agility. The tadpoles of the turbulent frogs are also peculiar in that they have a suction cup on their abdomen, which can be attached to rocks to prevent them from being washed away by the rapids. The toad with a "beard" is a rare frog endemic to China, first found in Emei Mountain, and later found in several southern provinces. This kind of frog has a wide, rounded, flat muzzle, and 12-16 vertebral horny black spines on the edge of the male upper jaw, so it is called the bearded toad. The function of these "beards" is still under study. There are many species of frogs, but all of them feed mainly on pests.
Frogs have other uses besides contributing to agricultural production. The toad, though ugly and smelly in appearance, secretes a venom due to the root multituberculate protrusions on its skin. This venom can be used to make toadstool, which is an ingredient in a variety of medicines, and is said to have hemostatic, anti-inflammatory, detoxifying, and swelling-reducing effects. Chinese medicines such as Liushen Pill and Toadstool Pill contain toadstool. Ze frog is able to treat scabies and has the effect of detoxifying dampness, while tiger frog is able to treat pediatric chancre syndrome. Toad is a kind of frog produced in Northeast China. Toad oil extracted from its fallopian tube is a kind of tonic, which can cure weak qi, energy loss, memory loss, postpartum lack of milk, etc. The meat is edible. Now our country has begun to raise the toad. Bullfrogs are big, fat and tasty, and can be raised as side food. Canned bullfrogs have been sold abroad.
With the weather slowly warming up, the hibernating frogs start to wake up. As we all know, frogs play an inestimable role in hunting pests, protecting farmland and maintaining ecological balance, so we should strongly advocate the protection of frogs. Although the Agriculture Department has issued instructions on the protection of frogs, the implementation of the protection of frogs has not been thorough enough due to the habit of eating frogs in some areas. Therefore, we advocate that, while vigorously publicizing the protection of frogs, we should develop the frog farming industry and raise some species of frogs with large bodies and much meat, so as to protect the frogs in the farmland and meet the needs of the people.