Occurrence and Control of Silkworm Zombie Disease

Bombyx mori, also known as sclerosis, is a silkworm disease caused by fungal parasites. The carcass of the diseased silkworm dried up and hardened, and hyphae and conidia grew on the body surface. Different color spores are produced outside the diseased silkworm carcass, which can be divided into Beauveria bassiana, Beauveria bassiana and brown bassiana, among which Beauveria bassiana is the most common. There are two ways of infection: contact infection and trauma infection. both spores attach to the surface of silkworm body through the air, mulberry leaves and other media, and then drill into the silkworm body to parasitize. If it is not prevented in time, the infection is very fast and the mortality rate is high.

1. Smoking and anti-rigidity method

It is usually smoked with chlorpromazine. Use 1 gram per cubic meter of silkworm room during the period. Close the doors and windows in time after lighting the smoke. After sealing for 30 minutes, the windows can be opened for air exchange. If you encounter a temporary lack of anti-stiffness agents, you can also use pine needles (15 grams per cubic meter of silkworm room) or sawdust, straw, grain husks, etc.; you can also use 10 to 15 grams of dry wood per cubic meter of silkworm room for incomplete combustion, so that the smoke can be emitted within half an hour as far as possible, and fill the silkworm room. Keep it for 1 hour, and then discharge the smoke.

two。 Sprinkling medicine to prevent rigidity

For ant silkworm and Qi silkworm, silkworm body and silkworm seat can be disinfected with silkworm seat net, enemy stiff powder or disease prevention No. 1. Use once a day in wet weather or during periods of frequent occurrence of silkworm bassiana. The method is: before eating or giving new leaves, sprinkle the medicine and give it to the mulberry within 5-10 minutes. Note that Bombyx mori should not be mixed with alkaline substances such as lime.

3. Body spray anti-stiffness method

During the period of strong silkworm, once the silkworm rigidity occurs, the antibacterial agent 420 can be used to prevent the stiffness. The method is to dilute the antimicrobial agent 420 pair of water into a 20-fold solution. Before giving mulberry, spray it evenly on the silkworm body and silkworm seat with a sprayer, and then remove sand from the mulberry. In the process of spraying antibacterial agent 420, do not come into contact with alkaline substances, otherwise, it will affect the efficacy.

4. Anti-rigidity method of dipping net

It can be combined with sand removal, and the sand removal net can be impregnated with antimicrobial agent 420 to achieve the purpose of preventing and controlling silkworm infestation.

While taking the above methods to control silkworm infestation, we should also seriously eliminate mulberry pests and prohibit the spread of the disease, such as basking silkworms in the sun.