In recent years, pests have been prevalent, and it is necessary to use pesticides rationally, scientifically and safely to delay the resistance of pests to pesticides and reduce the damage of pesticides to humans, crops and the environment.
Today we will talk about the rotation of three popular pesticides, thiamethoxam, imidacloprid and dinotefuran.
All three drugs belong to neonicotinoid insecticides, which have significant killing effects on common piercing-sucking mouthparts pests such as aphids, thrips, whiteflies and psyllids on citrus.
1. Imidacloprid
Imidacloprid is the first generation of neonicotinoid insecticides, a low-toxic, low-residue, high-efficiency and broad-spectrum insecticide.
Imidacloprid Insecticidal Spectrum
Imidacloprid is mainly used to control piercing-sucking mouthparts pests, such as aphids, planthoppers, whiteflies, leafhoppers, and thrips; it is also effective against certain pests of Coleoptera, Diptera, and Lepidoptera, such as rice weevils, rice mudworms, rice borers, and leafminers.
Imidacloprid Insecticidal Mechanism
After the pests come into contact with the agent, the normal conduction of the central nervous system is blocked, causing them to be paralyzed and die. It has good rapid effect, with a high preventive effect one day after the drug is applied, a long lasting effect, and a residual period of up to about 25 days. The efficacy of the drug is positively correlated with temperature, and the higher the temperature, the better the insecticidal effect.
How to use 70% imidacloprid
Aphids, thrips, whiteflies, and psyllids: spray 3000-6000 times.
Leafminers: 10 grams per tree, spread around the trunk or apply 50 times of water to the trunk or irrigate the roots at 2000 times.
2. Thiamethoxam
Thiamethoxam is a second-generation neonicotinoid insecticide with a wide insecticidal spectrum, high activity, strong conductivity, and low toxicity.
Insecticidal spectrum of thiamethoxam
Thiamethoxam is suitable for a variety of fruit trees and has good control effects on many types of piercing-sucking mouthparts pests and leaf-mining pests.
At present, it is mainly used for control in fruit tree production: scale insects (arrow-pointed scale, red wax scale, red round scale, Kangpian scale, etc.) of citrus trees, leaf miners, aphids, citrus psyllids, black thorn whiteflies, whiteflies, scale insects of grapes (Konner mealybugs, Oriental quill scale, etc.), mulberry white scale and ball-hard scale of peach, plum and apricot trees, spirea aphids of apple trees, pear psyllids of pear trees, etc.
Thiamethoxam Insecticide Mechanism
After the insects ingest the pesticide, it interferes with the conduction of nerve information in the insects, causing the insects to stop feeding quickly, inhibit their activities, and remain in a state of high excitement until they die.
The peak of death after application of the pesticide to piercing-sucking mouthparts pests and leaf-mining pests is 2 to 3 days, and the effective period can reach about 1 month. It has the characteristics of high prevention effect, long effective period, and low dosage.
Compared with other nicotine insecticides, thiamethoxam has higher activity, better safety, wider insecticide spectrum, and no cross-resistance.
Usage of 30% thiamethoxam suspension
Aphids, whiteflies, thrips, scale insects: 2000-3000 times, fully spray the front and back leaves.
3. Dinotefuran
Dinotefuran belongs to the third generation of nicotine insecticides.
Dinotefuran Insecticidal Spectrum
It is mainly used to control various planthoppers, stink bugs, whiteflies, leafhoppers, leafminers, thrips, flea beetles, mealybugs, aphids, leafminers, peach borers, rice borers, diamondback moths, cabbage worms, etc., and is highly effective against sanitary pests such as fleas, cockroaches, termites, houseflies, mosquitoes, etc.
Dinotefuran Insecticidal Mechanism
It mainly acts on the insect neurotransmitter system, paralyzing the pests and exerting an insecticidal effect. It has a wide insecticidal spectrum, excellent systemic penetration, and shows high insecticidal activity at very low doses.
It has contact and stomach poisoning effects, strong systemicity, and long lasting effect. Compared with the first and second generation insecticides, it has a wider insecticidal spectrum and is more convenient to use, which can overcome the resistance risks brought by the first and second generation insecticides.
Usage of 20% dinotefuran
Citrus aphids, thrips, whiteflies, psyllids: spray at 2000-3000 times.
