Common symptoms and prevention of silkworm poisoning

Pesticide poisoning: 1. There are several categories of pesticides that often cause silkworm poisoning, such as organophosphorus, organic nitrogen, pyrethroid and plant pesticides. All kinds of pesticides cause poisoning by polluting mulberry leaves, silkworm room tools, air, nibbling, valve breathing or contact.

2. There may be three functions of activation, accumulation and detoxification of pesticides after entering the silkworm. Most pesticides can be accumulated or activated to poison silkworms. The common symptom of all kinds of pesticide poisoning is to suddenly stop eating mulberry. Because of the different composition, structure and nature of chemical drugs, different special symptoms appear, which can be used as the basis of diagnosis. To determine what kind of drug poisoning should be determined according to the body color, posture, action, spitting, spasm and cadaver status of the poisoned silkworm.

3. Prevention of pesticide poisoning: mainly prevent pesticide pollution of mulberry leaves, prevent pesticide pollution of silkworm rooms, silkworm tools, air and breeder clothing, hands and feet. In addition, we should also pay attention to the residual period of pesticides, the residual period of field use has passed, but the residual period of silkworm may not have passed. Because silkworm is domesticated, its resistance is weaker than that of wild insects, and it is very sensitive to the concentration and dose that can not be killed by wild insects, so special attention should be paid to it.

Factory exhaust gas poisoning: the waste gas from the factory pollutes the mulberry leaves, nibbling away at the mulberry leaves and poisoning. The main exhaust gases causing silkworm poisoning are hf and so2. The poisonous silkworm in the waste gas is mainly poor appetite, uneven development and prolonged age. During the period of big silkworm poisoning, the internodes were raised with black ring spots. The skin is easy to break but the blood is transparent, and there is no source of disease by microscopic examination.

Prevention methods: 1. Planting high-pole shelterbelts between factories and mulberry fields, such as privet, poplar locust, sycamore, etc., to reduce the harm of waste gas to mulberry trees; 2, to strengthen the monitoring of fluoride content in mulberry leaves; 3, to raise silkworm varieties with strong resistance to fluoride; 4. Mulberry leaves near industrial waste gas pollution sources can be detoxified by washing or spraying lime mortar to reduce harm. 5, fresh mulberry leaves should be replaced immediately after silkworm poisoning.

Gas poisoning: it often occurs in the period of promoting youth or small silkworm, especially in the period of co-rearing of young silkworms, because it is heated directly with coal or charcoal in the silkworm room, and bad gases are produced due to insufficient combustion or some toxic substances in coal. poisoning caused by the respiration of silkworms into the body.

Prevention is mainly to select appropriate heating materials, pay attention to heating methods, more air exchange can be avoided.