CATDOLL : CATDOLL: How to breed grasshoppers and keep seeds (How to breed grasshoppers and keep seeds ants)

1. What are the issues that need to be paid attention to when raising grasshoppers?

Leeches are strong, easy to grow, and very easy to manage. The main management is feeding and adjusting water quality.

⑴ Feeding: Leeches mainly feed on invertebrates such as snails and earthworms, as well as the blood of mammals. The natural feed for artificial feeding is mainly snails from a wide range of sources, supplemented by earthworms, insect larvae, etc. Artificial feed is mainly the blood of various animals. Snails can be released at one time, that is, a certain number of snails (about 25 kg per mu) are released in the breeding pond, and they are allowed to reproduce naturally, so that leeches can feed freely.

It is not advisable to put too many snails in the pond to avoid competing with leeches for space. Feeding animal blood once a week has a significant effect on the rapid growth of leeches. Put blood clots from animals such as pigs, cattle, and sheep into the pond, one piece every 5 meters or so. Leeches will quickly gather after smelling the fishy smell and disperse on their own after sucking enough. Remove the blood clot residue in time to avoid water pollution.

⑵ Adjust water quality: Leeches are not very demanding on the environment and water quality. They will stop feeding if the water temperature is kept below 15-30℃. Too high a temperature will also affect their growth. They can also grow in dirty water. However, the artificial breeding density is high, so it is better to keep the water clean and ensure a certain amount of dissolved oxygen. The water temperature is high in July and August, so pay attention to proper water changes.

⑶ Winter management: Ensure the safe wintering of leeches. After winter, the temperature drops below 10℃, leeches stop feeding, burrow into the soil or under leaves to hibernate. Leeches released in early spring are generally grown into adults and can be processed and sold. When catching, drain the water first, then scoop them up with a net, select large and strong ones for seed, 15 to 20 kilograms of seeds per mu should be kept, and put into the breeding pool for wintering. It is possible to drain the water for wintering. After draining, straw or wooden poles can be added to the surface of the pool to prevent freezing and keep the soil moist. It is also possible to winter with ice, and the pool water should be appropriately deepened to prevent complete freezing.

Leech farming

1. Baiting

The natural baits are mainly freshwater snails, earthworms and some insects. In large-scale breeding, various animal blood, viscera, freshwater fish, shrimp, shellfish and snails, as well as livestock feed and crop straw are added. A certain number of wild snails or golden apple snails can be put into pond breeding, generally about 0.05-0.1kg/square meter, to allow them to reproduce naturally, coexist and grow with leeches, and provide them with food. The number of snails should not be too large, because too many snails will compete with the main breeding species for living space, and the host and guest will change. When feeding animal blood or mixed bait, attention should be paid to feeding at intervals and timely removal of leftover bait, especially in hot weather, so as not to pollute and corrupt the water quality and affect the growth of leeches.

2. Daily management

Leeches have very few diseases, and the main thing to do is to regulate water quality. Although leeches are not very demanding on the environment and water quality, if the water environment changes too much or deteriorates, it will affect their growth and reproduction. During the breeding process, the water temperature is generally maintained between 10-40℃. The water used for breeding that is too fertile and polluted must maintain a certain amount of dissolved oxygen. Generally, the dissolved oxygen in the water body should be greater than 0.7mg/L. If hypoxia occurs, small water bodies can be solved by artificial watering, and larger water bodies must be promptly injected with new water or replaced. It is very important to maintain relatively fresh water quality in the hot summer season.

Greenhouse wintering

Due to the influence of the region, the cultivation of leeches in the north should establish a solar wintering greenhouse under artificial conditions to break their hibernation habits, increase the cultivation time, and shorten the market cycle. The solar greenhouse is generally a bamboo and wood plastic thatch structure. The northern wall is cast earth or brick-concrete, 0.8-1.5m thick, east-west, 30-50m long, 10-15m north-south span, and 5-7 rows of main columns. Cover with drip-free plastic film and rollable straw thatch, leaving doors, passages and vents. In the severe cold and snowy season, snow removal and artificial heating measures should also be taken. More advanced greenhouses can use plastic steel without columns, but the cost is relatively high.

By building a solar greenhouse, we can systematically capture the big ones and keep the small ones, and concentrate them for the winter. During the daily management, we should pay close attention to the temperature changes inside and outside the greenhouse, as well as increase oxygen, prevent wind and cold, so as to ensure the normal growth and overwintering of leeches, and prepare enough leech seeds for the next year.

Disease control

1. Dryness disease: caused by high temperature, the diseased leeches have poor appetite, little or no activity, are thin and weak, and their bodies are shriveled, dehydrated and shrunken, and their bodies are black. Prevention and control methods: ⑴ Soak the diseased leeches in 1% salt water twice a day for 10 minutes each time. ⑵ Feed them with yeast tablets or oxytetracycline, increase calcium-containing food, and improve disease resistance. ⑶ Increase water flow to lower the water temperature.

2. White spot disease: It is caused by protozoa such as Ichthyophthirius punctatus. The diseased leeches have white spots and bubbles on their bodies, small white spots, inflexible movements, inability to balance when swimming, and loss of appetite. Prevention and control methods:

⑴ Soak the diseased leeches in 2 mg/L mercuric nitrate for 30 minutes each time, twice a day.

⑵ Regularly disinfect the pool water with bleach, usually 1-2 times a month.

3. Gastroenteritis: caused by eating spoiled food or food that is difficult to digest. Infected leeches have a poor appetite, are lazy to move, and have red and swollen anus. Prevention and treatment methods:

⑴ Mix 0.4% sulfamethoxazole with the bait and feed it.

⑵ Mix feed with 0.2% oxytetracycline and feed.

Additional information:

Reproductive habits: Leeches are hermaphrodites, cross-mate, and are fertilized internally. They have both male and female reproductive organs, and mate in opposite directions. There is a "sex reversal" phenomenon in their life history, and there is gender role exchange. A leech can be both a father and a mother, playing different roles at different stages of its life.

About a month after mating, the female's reproductive organs secrete a thin mucus that contains the egg band in the shape of a "silkworm cocoon". The egg band is then expelled from the body and incubated in wet mud at a suitable temperature. After about 16-25 days, the young leeches hatch from the cocoon and begin their independent life.

2. Grasshopper breeding technology?

To raise locusts, you need to build a breeding shed. It is best to choose a well-ventilated and sunny place, such as in front of or behind the house, in an idle courtyard or plot of land. The floor of the breeding shed should be 10 to 15 centimeters higher than the surrounding ground to facilitate drainage in the rainy season. The shed can be built with bamboo strips, bamboo poles, and wooden sticks as supports, and then use gauze to make a greenhouse-like shed cover, bury the bottom edge in the ground, leaving a door, and install a zipper on the door or stick it with adhesive strips. The height of the shed is 1.5 to 2 meters, and it must be built by the end of April.

The area of ​​the shed depends on the number of locusts. Generally, 600 to 800 adult locusts can be raised per square meter. At the beginning, 15 square meters are enough to raise 10,000 locusts. Each female locust can lay 50 to 80 eggs. As the number of locusts increases, the shed will continue to be expanded.

After the breeding greenhouse is built, wheat is planted densely on the ground inside the greenhouse to prepare for the young locusts to eat. Locust management: First prepare non-toxic soil, mix new sawdust and soil at a ratio of 2:1, with a water content of 20% to 30%, spread 3 cm to 5 cm thick on the utensils or wooden boards, and cover the eggs with about 1 cm thick soil. After 10 to 15 days of incubation, all locusts will be hatched around May Day.

After hatching, the young locusts shed their skin once every seven days, and each sheds its skin once for one instar. After 5 sheds, they become adults. After another 50 days, the adults can be sold (500 to 700 locusts per kilogram) or kept for breeding and laying eggs. During the first to third instars, the larvae eat very little food. After 35 days of becoming adults, their food intake doubles. In addition to collecting some wild weeds for feeding, they can also cut artificially grown Mexican corn grass for feeding.

3. Can locusts be raised to keep seeds?

Can

Locust management: First prepare non-toxic soil, mix new sawdust and soil in a ratio of 2:1, with a water content of 20% to 30%. Spread 3 cm to 5 cm thick on the container or wooden board, and cover the eggs with about 1 cm thick soil. After 10 to 15 days of incubation, all locusts will hatch around May Day. After hatching, the young locusts shed their skin once every 7 days, and each sheds once for one age. After 5 sheds, they become adults. After another 50 days, the adults can be sold (500 to 700 locusts per kilogram) or kept for seed and egg laying. During the 1st to 3rd age, the larvae eat very little. After 35 days of becoming adults, the food intake doubles. In addition to collecting some wild weeds for feeding, they can also cut artificially planted Mexican corn grass for feeding.