Is chlorpyrifos pesticide harmful to tobacco?

Chlorpyrifos has contact toxicity, stomach toxicity and fumigation effects. The residue period on leaves is not long, but it is long in soil, which has good control effect on underground pests and is harmful to tobacco. The scope of application is suitable for all kinds of chewing and sucking mouthparts pests on rice, wheat, cotton, fruit trees, vegetables and tea trees, and can also be used to control urban sanitary pests, such as 1% Shennong cockroach bait. Usage: 1 Prevention and control of rice pests: spray 60- 120ml of 40.7% EC per mu on rice leaf roller, rice thrips, rice gall midge, rice planthopper and rice leafhopper. 2. Wheat pest control: 50-75 ml of 40.7% emulsifiable concentrate and 40-50 kg of water per mu. 3. Prevention and control of cotton pests Cotton aphids use 50 ml of 40.7% Lesburn emulsifiable concentrate per mu and spray 40 kg of water. Cotton spider mites use 70- 100 ml of 40.7% lesburn EC per mu and spray 40 kg of water. Cotton bollworm and red bollworm spray water per mu 100- 169 ml. 4. Prevention and control of vegetable pests: Plutella xylostella, Plutella xylostella and soybean moth were sprayed with 40.7% Lesburn EC 100- 150ml per mu. 5. Prevention and control of soybean pests. Spraying 75- 100 ml of 40.7% EC per mu. 6. Pest control of fruit trees: spraying 40.7% EC1000-2,000 times solution on citrus leaf miner and red spider. The peach fruit borer is sprayed with 400-500 times of liquid, and this dose can also be used to control hawthorn spider mite and apple spider mite. 7. Prevention and control of tea pests: the effective concentration of tea geometrid, tea moth, tea caterpillar, green thorn moth, tea gall mite, tea orange gall mite and tea short beard mite is sprayed 300-400 times. 8. Control sugarcane pests and control sugarcane aphids by spraying 20 ml of 40.7% EC per mu. 9. Sanitary pest control and adult mosquito spraying 100-200mg/kg. The water content of Radix Pulsatillae is 15-20 mg/kg. Cockroaches use 200 mg/kg. Fleas 400 mg/kg. Tiny ticks, fleas, etc. Apply or clean 100-400 mg/kg to the body surface of livestock. Precautions 1. Can not be mixed with alkaline pesticides. In order to protect bees, it should be avoided during flowering. All kinds of crops should be stopped before harvesting. 3. If poisoning occurs, send it to the hospital for treatment, and you can inject atropine. Impact on environment: 1. Invasive routes of health hazards: inhalation, ingestion and percutaneous respiration. Health hazard: it is a moderately toxic organophosphorus pesticide. Inhibit cholinesterase activity. Symptoms of poisoning include headache, dizziness, weakness, blurred vision, nausea, vomiting and pupil contraction. In severe cases, pulmonary edema, incontinence and coma occur. 2. Toxicological data and acute toxicity of environmental behavior: LD 50 1.45 mg/kg (by mouth in rats); 202mg/kg (rat percutaneous); 1000 ~ 2000 mg/kg (taken orally by rabbits); 32mg/kg (taken orally by chickens) chlorpyrifos is highly toxic to bees, slightly irritating to eyes, and toxic to prawns and fish. Tolerance limit of aquatic organisms (48 hours): carp is 0. 13ppm, ADI is 0.00 1mg/kg. Hazard characteristics: flammable in case of open fire and high heat. Decomposition at high temperature releases toxic smoke. Combustion (decomposition) products: carbon monoxide, carbon dioxide, nitrogen oxides, sulfur oxides and phosphorus oxides. Laboratory monitoring methods: Manual for Testing, Analysis and Evaluation of Solid Waste translated by China National Environmental Monitoring Center, etc. Environmental standard: American workplace hygiene standard 0.2mg/m3 (peel) Maximum allowable residue: citrus 0.3ppm, cottonseed and cottonseed oil 0.05ppm, rice 0. 1ppm, Chinese cabbage and lettuce 0. 1ppm. Emergency treatment and disposal methods: Fire fighting: Firefighters must wear gas masks and full-body fire fighting clothes. Use dry powder, sand, foam and carbon dioxide fire extinguishers to extinguish the fire. First aid and prevention: After skin and eyes contact, wash with water, and wear protective clothing and safety glasses. Leakage treatment: evacuate the leaked contaminated area quickly and strictly restrict access. Cut off the fire source and avoid direct contact with the leakage. Small amount of leakage: adsorbed or absorbed by sand or other nonflammable substances. A large number of water leaks: build a dike or dig a pit to accommodate; Cover with foam to reduce steam disaster. Pump it into a tank car or a special collector with a pump, and recycle it or transport it to a waste disposal site for treatment. If it is solid, collect it in a dry, clean and covered container with a clean shovel. If there is a large amount of leakage, collect and recycle it or transport it to the waste disposal site for treatment.