The introduction of imidacloprid-related knowledge has been covered in the previous section. In order to facilitate the farmers' friends to have a more comprehensive understanding of imidacloprid, Xiaobian summarizes the properties, methods of use and precautions of imidacloprid. Let's learn together.
1. Physical and chemical properties and preparations:
The original drug is light yellow crystal, has a weak odor, is hardly soluble in water, and has low solubility in an organic solvent such as isopropyl alcohol. Storage is stable at room temperature.
Common preparations include 10% WP, 70% Emerald Water Dispersible Granules, 10% Thousand Red Wettable Powder, and 10% Dagongchen Wettable Powder.
2, toxicity:
Imidacloprid is a low-toxic insecticide . The original drug has a slight irritating effect on the eyes and has no irritating effect on the skin. The acute oral LD50 of the original drug was 1260 mg/kg, and the acute oral LD50 of the mice was 147 mg/kg (male) and 126 mg/kg (female).
The acute percutaneous LD50 of rats is greater than 1000 mg/kg. The daily intake of humans is 0.057 mg/kg.bw, the acute percutaneous LD50 is about 450 mg/kg, and the acute oral LD50 is greater than >5000 mg/kg.
3, the action characteristics: imidacloprid is a high-efficiency broad-spectrum systemic insecticide of pseudo-nicotinoids, belonging to the nitromethylene group, which has both stomach poisoning and contact killing effect, and has a long-lasting effect on the sucking mouth. The pests have a good control effect.
The drug mainly acts on insect nicotinic acetylcholine receptors in insects, thereby interfering with the normal conduction of insect nerves. It has different mechanism of action from common neurotoxic insecticides, and therefore kills with organophosphorus, carbamate and pyrethroids. The insecticide has no cross-resistance.
4, prevention and treatment objects and methods of use:
Bemisia tabaci: In the beginning and the nymphs, you can choose 70% Emerald water dispersing granules 3000 ~ 4000 times liquid, or 10% thousand red wettable powder 2500 times liquid, or 10%.
Dagongchen WP 2500 times solution, or 10% å¯ WP 2500 times liquid spray control.
Aphids: Controlling aphids should be used as soon as possible, and they should be controlled at the stage of spotting. 70% Emerald water dispersible granules 3000～4000 times liquid, or 20% Kangfudu suspension agent 4000 times liquid, or 10% thousand red wettable powder 2500 times liquid, or 10% 蚜虱 å¯ wettable powder 2500 times liquid, or 10% Dagong WP 2500 times liquid spray control.
Daqingye: use 70% Emerald water dispersing granules 3000~4000 times liquid, or 20% Kangfudu suspension agent 4000 times liquid, or 10% Qianhong wettable powder 2500 times liquid, or 10% 蚜虱 clean WP 2500 times liquid spray control.
5, Note: This product should be stored in a dry, ventilated place; although this product is a low-toxic pesticide, but it is highly toxic to silkworms, bees and other beneficial insects, should pay attention when using in the sericulture area, do not pollute mulberry leaves, silkworms With silkworms and silkworms, it is harmful to bees when spraying on the surface of the leaves. There is no problem when the seeds are treated. Safety should be taken when using them. If poisoning occurs, it should be sent to the hospital for symptomatic treatment.
More pesticide knowledge , please pay attention to China Pesticide Network
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