CATDOLL : CATDOLL: What should we pay attention to when breeding grasshoppers? (What should we pay attention to when breeding grasshoppers?)

1. How to breed grasshoppers that are white and yellow?

How to breed white and yellow grasshoppers:

1. Select a site and build a shed

When raising grasshoppers, you should choose a place with flat terrain, plenty of sunshine and good ventilation as the breeding site, then build a breeding shed with wooden sticks and bamboo poles, and cover it with gauze to prevent the grasshoppers from escaping, and then spread a layer of sandy soil on the ground in the shed to increase the soil's drainage and air permeability, which is conducive to the growth of grasshoppers.

2. Seed selection and stocking

There are many varieties of grasshoppers. Before raising them, you need to select suitable varieties according to the local climate and environment. The grasshoppers are required to have a complete body, be energetic, healthy and free of diseases, etc. Then they should be released at a stocking density of 600 to 800 per square meter.

3. Provide food

When raising grasshoppers, you need to feed them nutritious food once or twice a day. You can choose fresh and clean vegetable leaves, wheat, corn kernels and other plant foods, and feed them protein-rich foods to promote the growth of grasshoppers. In addition, the amount of food fed needs to be increased during the breeding period.

2. Grasshopper breeding technology?

Species selection: There are many varieties of grasshoppers, and different grasshopper varieties need to be selected according to different regions.

Site: The grasshopper breeding site should be selected in an area with sufficient light and good ventilation. Attention should be paid to the closedness of the site to prevent grasshoppers from escaping.

Breeding: Before raising grasshoppers, you need to spread an appropriate amount of leaves on the ground for the grasshoppers to eat. Sufficient feed needs to be prepared during the growth period of the grasshoppers, otherwise the grasshoppers will be injured.

3. What are the issues that need to be paid attention to when breeding 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.