Techniques for breeding Locusta migratoria

I. brief introduction of East Asian Migratory Locust

East Asian migratory locusts belong to Insecta, Orthoptera and Acrididae. According to statistics, there are 223 genera and 859 species in Acridoidea. It is one of the better species of locusts. East Asian migratory locusts grow under natural temperature conditions, with two generations a year. The first generation is called summer locusts, and the second generation is autumn locusts. The migratory locusts have six legs, which are divided into three parts: head, chest and abdomen, two pairs of wings on the chest, horny forewings and membranous hind wings. The body is yellowish brown, the male is bright yellow in the mating stage, and the length of the female locust is 39.5 to 51.2 mm. The male locust is 33.0-41.5 mm long and is good at jumping and flying after adulthood.

The East Asian migratory locust has a strong body, a wide range of feeding and strong adaptability. after hatching into young locusts, it can be an adult after 35 days, and can be sold after about 50 days, so the time is short and the return is fast. Raising 10,000 adult East Asian migratory locusts can reach 40 jin. According to the current market price of 15,25 yuan per jin, the economic benefit is considerable, and the seeds are purchased only once. Since multiplication dozens of times, eggs hatch locusts, locusts lay eggs, over and over again, raising for many years, constantly selling money, a female locust can lay more than 35-90 eggs at a time.

The migratory locust is favored because it is soft, fresh and nutritious. According to expert analysis, its protein content is as high as 74.88%, fat content is 5.25%, carbohydrate content is 4.77%, and contains 18 kinds of amino acids and a variety of active substances.

2. Culture and management of East Asian migratory locust

1. Construction of locust breeding shed and arrangement of greenhouse land.

Before building the shed, wipe out the ants and mole crickets on the ground, and use the methods of trapping, trapping and burning. The above animals are the natural enemies of locusts and can prey on locusts and destroy locust eggs, so these animals must not be allowed to exist in the shed. The ground of the shed should be 10 to 15 centimeters above the surrounding ground in order to facilitate drainage during the rainy season. The best soil quality is sandy loam, which is not easy to agglomerate and is easy to lay eggs and take eggs. Single-leaf crops such as wheat are planted on the floor of the shed to prepare young locusts for consumption.

The construction area of the shed should be determined according to the number of locusts. Ten thousand locusts can be raised with 15 square meters. You can make use of the free space inside and outside the courtyard. According to your own conditions, you can use iron, big sticks and bamboo slices to build a support for the shed. Then, according to the size of the scaffolding, use cold cloth to make a shed like a mosquito net, hang it on the scaffolding, bury the bottom in the ground, leave the door, and install a zipper on the doorway. This device is designed to prevent locusts from running out and to facilitate feeding and management. The height of the shed is 1.5 to 2 meters. In order to keep warm or prevent rain, the shed can be covered with plastic sheet. When the temperature is high and the locusts are bigger (more than three years old), they are not afraid of rain, but not covered with plastic sheeting. If locusts are raised under natural conditions, the construction of the shed must be completed by the end of April. It is advisable to choose a place with plenty of sunshine.

2. Hatching and management of migratory locust eggs can be hatched when the temperature reaches 25-30 ℃, and the natural temperature will arrive in early May. First prepare non-toxic soil, sawdust 2:1, water content 10: 15%, spread 2-3 cm containers, spread locust eggs on the soil, then cover the eggs with about 1 cm thick soil, and then top the utensils with thin film. Check every half day. After finding the young locusts, use a soft brush to put the young locusts on the food in the shed. After 12-15 days of incubation, all the young locusts were hatched. Young locusts like to eat fresh and tender wheat seedlings, corn seedlings, weeds and other monocotyledons, but eat very little. 1-3-year-old young locusts should pay attention to rain protection. It is best to control the temperature between 25 and 30 ℃, light for more than 12 hours, and humidity of about 15%, because locusts are the most active, fond of eating and conducive to growth in such conditions. Migratory locusts like to live in groups at the age of three.

3. Feeding and management of adults over 3 years old.

Young locusts exfoliate once 5-7 days after laying eggs, and once peeling is one-year-old, strong peeling is fast, weak desquamation is slow, and they are unearthed successively in the process of hatching. Over three years old, they fly very fast, and their food intake increases gradually. At this time to ensure that there is enough food in the shed, first of all, locusts do not have enough to eat will affect the normal growth. In addition, there will be the phenomenon of strong food and weak food, especially the peeling locusts can not move, the physique is very soft, there is a risk of being eaten and bitten. Wheat bran can be added to locusts over three years old. Clean the shed once every two days to keep the shed clean. After five times of peeling, locusts grow into adults, which is about June 15. Migratory locusts generally enter the sexual maturity period 10 to 15 days after Eclosion and begin to mate. At this time, the migratory locusts are very fat, except for some locusts that lay eggs. Other locusts can be sold in the market, and the time is appropriate in early July.

4. Management of migratory locusts before and after spawning

After mating, the abdomen of the female locust gradually becomes thick and long, and the yellowish brown deepens, while the male locust presents a bright yellow. At this time, the ground of the shed should be neat and firm, so as to facilitate the spawning of female locusts. For example, there are few migratory locusts in the shed. In order to concentrate on spawning, part of the ground in the shed can be covered with plastic sheeting, leaving only part of the ground facing the sun as the spawning area. The humidity in the shed is about 15%. At this time, locusts eat a lot and should be supplied seriously. The female locust begins to lay eggs around July 10. The ovipositor of the female locust is thick, short and curved, and it is two pairs of hard chisel-shaped spawning valves to penetrate the soil into a hole to lay eggs. The gelatinous fluid is secreted while spawning, and a water-resistant protective layer is formed outside the egg after solidification, which surrounds the egg into an egg mass and plays a protective role in overwintering the egg.

The egg mass of the East Asian migratory locust is brown, slightly cylindrical and slightly curved in the middle, ranging from 40 to 70 mm in length. Each locust egg has more than 35-90 eggs, and a few have more than 100 eggs. This is the summer locust. Locust eggs are laid in the soil in the shed and are used to hatch the eggs of the second generation of "autumn locusts". When the temperature, humidity and light reach the hatching conditions, the second generation of autumn locusts will be unearthed naturally, and the time will be around July 20-25. The eggs of the second generation of locusts that are ready to be sold or not used for the time being should be taken out in time, using soil with a humidity of 10% to 15%, one layer of soil and one layer of eggs, and the last layer is the loading method of soil. Put it in a large can, seal the mouth of the bottle and store it in a 5-degree refrigerator. The feeding conditions before and after spawning are basically the same as those of locusts over three years old. The difference is that the light should be up to 16 hours a day, the feed should be adequate and more concentrate should be added.

3. Overwintering management of locust eggs

The overwintering of locust eggs is very simple. We can let the locust eggs in the shed spend the winter in situ. After winter, the locust spawning area can be covered with some weeds for the purpose of heat preservation.

Locusts' likes and dislikes of food and their natural enemies

1. The East Asian migratory locust has a wide range of feeding, just like feeding sheep, it likes to eat: Reed, thatch, pennisetum, thread grass, plate grass and so on. Gramineae: corn, wheat, sorghum, millet, etc., plants that locusts do not like to eat.

2. When collecting food for migratory locusts, we should pay great attention to avoid using food with pesticides. If you are not sure about the collected food, you can wash it in water and feed it.

In addition, it should be noted and reminded that the provenance of first-time farmers can be purchased from farms or farmers, and grasshoppers or eggs can be introduced.

Special reminder: grasshoppers belong to special breeding, so breeding should be cautious when there are no orders and reliable sales.