CATDOLL : CATDOLL: What are the main marine farmed fish species in my country?

1. What are the main marine farmed fish in my country?

There are more than 2,200 species of marine fish in my country, of which at least 90 species from 30 families are farmed. The main farmed species include sea bass, grouper, red fish, cobia, crucian carp, sea bream, yellow croaker, pufferfish, and flatfish.

2. What are the main agricultural diseases?

The impact of pests and land pollution on crops (such as various pathogens that are infectious to crops)

3. What are the main diseases of lotus pods?

1. Corruption

Also known as black root disease and lotus root plague, it mainly harms underground stems, above-ground leaves and leaf surfaces. It is the number one disease of lotus roots and is prone to occur in old lotus root fields and continuously cropped fields with shallow tillage layer and shallow water.

2. Brown spot disease

The disease mainly harms the leaves. At the beginning, the leaves are light yellow with brown spots, then gradually expand, the spots heal each other, the boundary between the diseased and healthy leaves is obvious with a yellow halo, and there are obvious ring patterns on the spots. In the later stage, black mold grows on the spots, and in severe cases, the leaves may die.

3. Brown streak disease

Causes

The higher the temperature and the more rainfall, the more severe the disease;

The disease is more serious on floating leaves and less serious on detached leaves.

The disease is more severe in deep water fields and less severe in shallow water fields.

4. What are the main types of agricultural diseases?

There are three main types of agricultural diseases: fungal diseases, bacterial diseases and viruses.

5. What are the main fish species in Dongying?

The main species include yellow croaker, yellow croaker, sea bass, pike, Spanish mackerel, hairtail, whitebait, and pure natural Yellow River knife fish. In addition, the freshwater aquaculture species in Dongying include hairy crabs at the mouth of the Yellow River, whiteleg shrimps, freshwater fish, etc. The marine aquaculture species include sea cucumbers, Japanese shrimps, South American shrimps, swimming crabs, etc.

Shallow sea aquaculture includes clams, green clams, variegated clams, flower clams, and the white clams unique to Dongying.

6. What are the main agricultural diseases?

1. Spot type: A considerable number of plant diseases caused by Pseudomonas infection are spotted, such as rice bacterial brown spot disease, cucumber bacterial angular spot disease, cotton bacterial angular spot disease, etc.

2. Leaf blight: Most of them are caused by Xanthomonas aeruginosa infection, and the leaves of plants will eventually wilt after being infected, such as rice bacterial leaf blight, cucumber bacterial leaf blight, konjac bacterial leaf blight, etc.

3. Bacterial wilt: Generally caused by Pseudomonas infecting the plant vascular bundle, blocking the transport pathway, causing the plant stems and leaves to wilt. Such as tomato bacterial wilt, potato blight, strawberry bacterial wilt, etc.

4. Ulcerative type: generally caused by Xanthomonas aeruginosa infecting plants, the lesions become corky in the later stage, with raised edges and sunken centers, forming an ulcer-like shape. Examples include citrus canker, bacterial spot disease of edible soybeans, and bacterial spot disease of tomato fruits.

5. Rot type: Most of them are caused by Erwinia infecting plants, such as bacterial soft rot of cabbage, bacterial soft rot of Solanaceae and Cucurbitaceae crops, and basal rot of rice.

6. Deformity: caused by infection with Bacillus thuringiensis, which causes the roots, root collars, lateral roots and branches of plants to become deformed and tumor-like, such as chrysanthemum root cancer.

7. What are the main diseases of sunfish?

Gill rot: The gill edges are whitish and rotten with mud and dirt. The inner epidermis of the gill cover bone is congested. In severe cases, the middle part is often corroded into a round, irregular, transparent "small window". The fish move slowly and have a dark body color, especially the head. Dissolve the bleaching powder and sprinkle it evenly throughout the pond.

Wheelworm disease: mainly caused by a large number of wheelworms parasitizing the skin or gills of fish. Fish infected with this disease are black, thin, eat out of group, and swim slowly. The peak period of wheelworm disease is 3 to 5 days after sunfish fry are planted in the pond, especially in spring and summer when there is a lot of rainy weather. If the pond is not cleaned and leveled thoroughly, or the water is returned for too long, and the water is too fertile, it is easy to breed wheelworm disease.

Prevention and control methods: Use quicklime + tea skin to thoroughly clean the pond, and apply fertilizer and stocking properly. Before putting summer flower fish in the pond, soak them in 2% salt solution for 15 minutes, and increase or decrease the time depending on the tolerance of the fish; use copper sulfate and ferrous sulfate mixture (5:2) to spray the whole pond to make the pond water concentration 0.7ppm, which has a good treatment effect.

Ringworm: The water temperature after sunfish seedlings are put into the pond is generally 20℃~25℃, and the peak period of ringworm incidence is during the transition period between spring and summer and autumn and winter, which causes particularly serious damage to the gill filaments of seedlings.

Prevention and control methods: Before stocking summer fish fingerlings, it is advisable to soak them in 1ppm crystal trichlorfon for 20 minutes to 30 minutes, which can effectively prevent dactylariasis; using 0.2ppm~0.4ppm crystal trichlorfon (content above 90%) or 1ppm~2ppm concentration of 2.5% trichlorfon powder, sprinkled throughout the pond, can treat dactylariasis.

Polyculture: Sunfish can be co-cultured with eels, domestic fish or other fish species; control the over-reproduction of plankton, small fish, shrimp and invertebrates in the pond; regulate water quality, and increase the yield of the main species. In polyculture, generally large seedlings of more than 5 cm are released per mu, and 500 to 2,000 fish are released per mu. The stocking amount can be determined according to the main product species of the polyculture pond.

In addition, when the pond is disinfected with drugs before stocking, the pond water is kept at an average depth of 1m. The following methods are used to remove wild fish and other harmful organisms in the pond, which can effectively prevent the invasion of pests and diseases.

8. What are the main diseases of eggplant in the seedling stage?

1. Damping-off disease: Damping-off disease of eggplant often occurs in the eggplant seedling stage. When the disease occurs, the stems change color and necrotize, gradually shrink, and the seedlings are close to the ground until...

2. Eggplant blight: Eggplant blight, also known as rotten eggplant, is the most common disease of eggplant. It has a high incidence rate, especially in the rainy season.

3. Sclerotinia rot: Sclerotinia rot is one of the common diseases of vegetables. It not only harms eggplants, but also many common vegetables. The disease first occurs at the base of the stem.

9. What are the main diseases of pomegranate?

14 common pomegranate diseases and pests have been preliminarily identified, including 9 diseases (pomegranate dry rot, anthracnose, brown spot, mildew, black mold, penicillium, stem wilt, frost damage, and fruit cracking) and 5 pests (aphids, peach borer, green stink bug, beetles, and wood borer).

10. What are the main types of agricultural diseases?

1. Spot type: A considerable number of plant diseases caused by Pseudomonas infection are spotted, such as rice bacterial brown spot disease, cucumber bacterial angular spot disease, cotton bacterial angular spot disease, etc.

2. Leaf blight: Most of them are caused by Xanthomonas aeruginosa infection, and the leaves of plants will eventually wilt after being infected, such as rice bacterial leaf blight, cucumber bacterial leaf blight, konjac bacterial leaf blight, etc.

3. Bacterial wilt: Generally caused by Pseudomonas infecting the plant vascular bundle, blocking the transport pathway, causing the plant stems and leaves to wilt. Such as tomato bacterial wilt, potato blight, strawberry bacterial wilt, etc.

4. Ulcerative type: generally caused by Xanthomonas aeruginosa infecting plants, the lesions become corky in the later stage, with raised edges and sunken centers, forming an ulcer-like shape. Examples include citrus canker, bacterial spot disease of edible soybeans, and bacterial spot disease of tomato fruits.

5. Rot type: Most of them are caused by Erwinia infecting plants, such as bacterial soft rot of cabbage, bacterial soft rot of Solanaceae and Cucurbitaceae crops, and basal rot of rice.

6. Deformity: caused by infection with Bacillus thuringiensis, which causes the roots, root collars, lateral roots and branches of plants to become deformed and tumor-like, such as chrysanthemum root cancer.