What specific pesticides work well for controlling aphids?

Aphids are a group of plant-eating insects, also known as greenflies, honey bugs, and so on, including all members under the superfamily Aphidoidea. Most species are oligophagous or monophagous, a few are polyphagous, and some species are important pests of economic plants such as grain, cotton, oil crops, hemp, tea, sugar crops, vegetables, tobacco, fruit, medicinal plants, and trees. Let us take a look below at what specific pesticides there are for controlling aphids!

Malathion

Malathion is a yellow oily liquid, slightly soluble in water and soluble in a variety of organic solvents. It is a highly effective, low-toxicity, broad-spectrum insecticide and acaricide, with contact, stomach, and a certain fumigant action on pests, no systemic activity, and a short residual period, with general efficacy lasting 7 days. It is effective against pests with piercing-sucking or chewing mouthparts, and is suitable for controlling leaf-surface pests of fruit trees, vegetables, and many other crops, as well as public health and stored-product pests. It has low toxicity to humans and livestock, and is highly toxic to bees and fish.

Fenitrothion

Fenitrothion has good control effects on pests of rice, soybean, cotton, fruit trees, vegetables, and many other crops, and is especially a specific pesticide for controlling rice stem borers. For example, against the giant borer, striped stem borer, yellow stem borer, rice planthopper, rice leafhopper, aphids, red spider mites, cotton bollworm, soybean pod borer, tea geometrid, and so on, applying 50-75 grams per mu (active ingredient) gives good control results, but its effect on mite eggs is relatively small. It sometimes causes phytotoxicity on cruciferous vegetables.

Pirimicarb

Pirimicarb is a highly selective aphicide, with contact, fumigant, and leaf-surface penetration effects. It can effectively control all aphids except the cotton aphid, and is also effective against aphids that have developed resistance to organophosphorus compounds. It kills insects quickly, but has a short residual period. It is safe for crops, does not harm natural enemies, and is an ideal agent for integrated pest management.

Deltamethrin

Deltamethrin is one of the most toxic pyrethroid insecticides, and has very good killing effects on many pests such as the cotton bollworm, pink bollworm, imported cabbageworm, diamondback moth, tobacco cutworm, tobacco budworm, leaf-feeding beetles, aphids, mirids, stink bugs, leafhoppers, fruit borers, leafminer moths, slug moths, caterpillars, geometers, cabbage loopers, armyworms, stem borers, grasshoppers, and so on.

Fenpropathrin

Fenpropathrin is a pyrethroid insecticide with contact, stomach, and a certain repellent action, and no systemic activity. Its greatest feature is that it also has excellent control effects on many harmful mites. It can be used on cotton, fruit trees, tea trees, vegetables, and other crops to control pests and harmful mites of the orders Lepidoptera, Homoptera, Hemiptera, Diptera, Coleoptera, and so on, and especially when insects and mites occur at the same time, it can achieve simultaneous control of both.

Imidacloprid

Imidacloprid is a neonicotinoid ultra-high-efficiency insecticide, with the characteristics of broad spectrum, high efficiency, low toxicity, low residue, difficulty for pests to develop resistance, and safety to humans, livestock, plants, and natural enemies, and it has multiple actions such as contact, stomach, and systemic activity. It is mainly used to control pests with piercing-sucking mouthparts, such as aphids, planthoppers, whiteflies, leafhoppers, thrips, and so on, and is also effective against certain pests of the orders Coleoptera, Diptera, and Lepidoptera, such as the rice weevil, rice leaf beetle, leafminer moth, and so on.