Rotenone is a plant insecticide with a long history, with selective insecticidal effect, insecticidal spectrum can control more than 800 kinds of pests, pests are not easy to produce resistance, insecticidal effect is slow but long-lasting. Up to 10 days or more. Because of its short half-life, easy decomposition and non-polluting environment, it is widely used in crop pest management around the world and is regarded as a natural low-toxic insecticide.
Product name: fish vine essence, fish vine cyanogen, poison fish vine, etc.
Chemical Name: (2r, 6as, 12as)-l,2,6,6a,12,12a-hexahydro-2-isopropenyl-8,9-dimethoxynaphthalene[3,4-6]furoyl[2,3-h]onaphthalene-6-one.
Physicochemical properties: the pure product is a colorless hexagonal plate crystal, melting point 163 °C (homogeneous dicrystalline form has a melting point of 180 °C), vapor pressure < 1m3pa (20 °C), almost insoluble in water (100 °C solubility is 15mg/l), slightly soluble in chain hydrocarbon solvents, easily soluble in polar organic solvents, the greatest solubility in chloroform (47.2g/100g). In the case of alkali racemic, it is easy to oxidize, especially in the presence of light or alkali, oxidation is fast, and the insecticidal activity is lost. The racemate insecticidal activity is weakened and is relatively stable in dry conditions.
Toxicity: Rotenone is moderately toxic. The original drug acute oral ld50 (mg/kg): rat 132~1500, mouse 350. It has a strong irritation to rabbit eyes. Mild irritation to human skin, moderate toxicity to humans, oral lethal dose of 300 to 500 mg/kg. Fish ketone is low toxicity to birds, ld50 (mg/kg): wild duck 2000, quail 1680, Japanese quail lc50 4500 ~ 7000 mg / l. High toxicity to fish, lc50 (96h, mg/l): mountain tooth quail 0.031, catfish 0.0026, blue gill 0.023. Invertebrate ec50 (48h) 0.002~100mg/l. It is non-toxic to bees and toxic to bees when mixed with pyrethroid insecticides. There were no mutagenic, teratogenic and carcinogenic effects on animals within the test dose.
Main dosage forms: 2.5%, 4%, 6%, 7.5% emulsion, 5% solutionable, 6% microemulsion, 0.75%, 5% suspension.
Mechanism of action: The mechanism of action of rotenone mainly affects the respiration of insects, and a component between nadh dehydrogenase and coenzyme q acts. The electron transport chain of the pest cell is inhibited, thereby reducing the atp level in the organism and eventually leaving the pest without energy supply, and then slowly dying of slow movement, paralysis and mobility. In addition, it can also destroy the midgut and fat body cells to cause local blackening of insects, affecting the activity of multifunctional oxidase in the middle intestine, so that the agent is not easy to be decomposed and effectively reaches the target organ, so that the insect poisoning is deadly.
Characteristics of action: Rotenone is a plant-based contact killing insecticide, acaricide, and has a contact killing and gastric toxic effect on pests. Selective, non-absorbent, easy to decompose light, easy to oxidize in the air, short residual time on crops, no pollution to the environment, safety to natural enemies.
Applicable crops: Rotenone is used to control a variety of crop pests such as cotton, fruit trees, vegetables, tobacco, mulberry, tea trees, flowers, etc.
Control objects: mainly used for the control of aphids, planthoppers, thrips, yellow melon, ape leaf insects, cabbage worms, twill moths, beet noctus moths, small cabbage moths, twenty-eight star ladybirds, mesozoans, carrot microtubule aphids, willow two-tailed aphids, palm thrips, yellow thrips, yellow thrips, color thrips, Indian naked thrips and other pests. In particular, it has a strong killing effect on aphids, thrips and yellow curved stripe jumping beetles, cabbage insects, and small cabbage moth larvae, and also has a strong touch killing and stomach poisoning effect.
Use technology
aphids
1. To control aphids on melons, nightshades and leafy vegetables, aphids should be sprayed 2.5% rotenone emulsion 400 to 500 times liquid at the beginning of the aphid occurrence, sprayed evenly in the early morning or evening, once every 7-10 days, sprayed 2-3 times.
2. For the prevention and control of edible mushroom jumping insects and fungus pseudo-walking insects, it can be diluted with 4% fish vine ketone powder for 500 to 800 times liquid spray.
Twill nocturnal moth
3. Control of twill moth, in the young larval stage of pests, mu with 4% rotenone emulsion 80-120 ml, mixed with water 30 kg evenly sprayed.
Cabbage moth
4. Control of small cabbage moth, apply medicine at the young age of larvae, can use 4% rotenone emulsion 80-160 ml, mixed with water 30 kg spray.
Jumping armor
5, the prevention and control of vegetable jumping nails, spraying in the early stage of pest occurrence, mu with the preparation of 4% rotenone emulsion 80-160 ml, with 30 kg of water even spray, sprayed once every 7-10 days, sprayed 2-3 times.
Precautions
1. Rotenone will accelerate degradation and lose its efficacy when it encounters light, air, water and alkaline substances, so it should not be exposed to it for a long time or mixed with alkaline substances.
2. Avoid storage under high temperature and light; it should be stored in a cool, dry and ventilated place.