The principle of killing poisonous fish
It is a kind of insecticide to control pests and mites such as Lepidoptera, Homoptera, Hemiptera, Diptera and Coleoptera, but some people use it to poison fish. What is the principle of killing poisonous fish? How to use it to control insect pests?
First, the principle of killing poisonous fish?
Methotrexate is a kind of pyrethroid insecticidal, which has contact, stomach poison and certain repellent effect, and has toxic effect on fish. However, I would like to remind you that "killing" poisoned fish is illegal and will pose a threat to the lives and health of human beings and animals, and serious cases will be sentenced.
Second, how to use disinfectant to control insect pests?
1. Control of cotton pests and harmful mites: control of cotton bollworm, control of cotton red spiders during egg incubation period, 30-35 ml of 20% EC per mu and 60-80 kg of water per mu during the occurrence of adult and nymph mites.
two。 Control apple Hawthorn red spider: in the peak period of harmful mites, spray with 3000 times of 20% EC.
3. Control peach heart borer: when the egg and fruit rate is 1%, spray with 20% EC 200-3000 times, spray twice every 10 days.
4. Control of Pieris rapae and Plutella xylostella: in the peak period of 2nd instar larvae, spray 20ml of 20% EC per mu.
- Prev
Where does the unimodal camel grow mainly?
Unimodal camels are mainly distributed in northern Africa and western Asia, and some come from the Horn of Africa, the Republic of Sudan, Ethiopia and Somalia. Unimodal camel introduction unimodal camel has only one hump. The coat color is dark brown to dark gray.
- Next
Where is the producing area of Hubei hairy crab
Hubei, referred to as Hubei, is located in the central part of China and belongs to the Yangtze River system. It is rich in aquatic products, rich in crayfish and hairy crabs. Do you know where Hubei hairy crabs come from? Where is the producing area of Hubei hairy crabs? Liangzi Lake, Honghu Lake, Qiancha Lake, River
Related
- A course of planting techniques and methods on how to grow carrots
- How to plant the latest tulips?
- Is it better to pick tea in the morning or in the afternoon? When is the best time for tea to be picked? what is the third or fifth tea?
- Launch Yuanxiao Happy combination Haocha + Tea Yuan healthy Taste
- Penghu Tourism "Fireworks 20 Parade with You"
- 2022 West Lake Happiness holds "Digital Revitalization Voucher" and draws iphone13 and laptop.
- Banqiao Fuzhou social houses are designed to change start-up combined with police elimination to create a safe and livable environment
- The convenient measure of "mechanical weeding" in Xinbei has been abused and the Agriculture Bureau has imposed heavy penalties on the illegal land consolidation.
- Changgeng University Joins Hands with Four Memory Factories to Rescue Memory Talent Shortage
- The list of Taiwan's top 100 MVP managers is listed by the Director-General of the Farmers' Association of Sanxia District.