Effective prevention and treatment of black beetle shell
The black tortoise shell is called "iron nest seedling". Wuhe Township in Tengchong County is one of the main pests that harm crops, and it does more serious harm to sugarcane and rice seedlings. It mainly bites on the stem base of sugarcane seedlings and rice seedlings, causing the death of the whole plant, which has a great impact on sugarcane and rice. The living habits of the insect are as follows: it goes to rest in the soil during the day and comes out in the evening and at night, which is mostly cluster harm and ferocious, which is very serious to sugarcane and dry seedling raising. In the aspect of prevention and control, one is to use irrigation to make the beetle shell float out of the water for artificial capture, and the other is to use chemical control, which is poured with phoxim or sprayed at 17-18:00 in the afternoon.
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Prevention and treatment of three major diseases of pond fish in spring and summer
1 symptoms and etiology of carp hemorrhagic disease 1.1 the abdominal scales, fins and tail stalks of the fish were congested and red, and the diseased fish floated close to the ice or on the surface of the water, slowly swam along the edge of the pool in groups and gradually died. ① hemorrhagic septicemia. The appearance of the diseased fish is normal or the abdominal scales are congested and red. Blood appears in the body cavity when dissecting the diseased fish, and there are congestion spots in the internal organs. The disease is caused by Aeromonas hydrophila. ② brown disease (hemorrhagic Gill disease). The gills of diseased fish are swollen, the color is dark, and some of them are shredded.
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How to feed five kinds of feed for fish fingerling
First, cake feed. Cake feed for small fish should be broken, soaked, ground and then fed, and then softened by feeding big fish. Second, cereal feed. Large grains such as corn should be processed and crushed and fed to fish; small grains such as grains can be sprouted and fed to fish. Young grain white sprouts have high nutritional value, and fish eat easily, absorb quickly and gain weight quickly. Third, green feed. After the green feed is removed from the soil, it can be fed directly to the big fish, while the small fish should be chopped up or
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