Aphids belong to the order Hemiptera, commonly known as greasy insects, honey worms, oil man, etc., with fast reproduction and strong adaptability. Aphids are mainly distributed in temperate and subtropical regions of the Northern Hemisphere, and are rarely distributed in tropical areas. There are about 4700 species known in the world, and about 1100 species are distributed in China. Isn't that scary? Aphids are sucking mouthparts and toothless. The sucking mouthpiece harms young shoots, young leaves, and flower buds, and the excreted feces is the source of mold disease, inhibiting growth, spreading the virus, and subsequently attracting ants to harm the fruit.
1. The insect is small and easy to spread
Aphids are small and soft, the size of a needle, very easy to spread, some will enter the room through ventilation, from the first occurrence of the central plant to the surrounding spread to the pest, the first formation of the central plant.
2, fast reproduction
Aphids can give birth to 4-5 small aphids in solitary females after 5 days of birth, and the generation is 4-5 days, and the reproduction rate is extremely fast.
3. Suction mouthpiece
The mouthparts are fine needle-shaped and will stab the young shoots, stems and leaves of the plant, and suck up the sap of the plant.
1. The aphid absorbs a large amount of sap from the plant with a stinging mouthpiece, so that the plant grows short, the leaves are curled, the buds cannot be opened, and the plant ages prematurely and ages prematurely.
2. Aphids can carry viruses and then invade plants from prickly wounds, causing secondary infestation.
3. Aphids suck up too much plant sap and excrete it, attracting ants, infecting mold, and inducing coal pollution.
1. Prevention and control by agricultural and physical methods
Carefully clear the garden in winter, eradicate weeds in time in spring, spray pesticides to eliminate aphids on overwintering hosts, and reduce the source of insects.
Aphids prefer yellow and can be trapped by yellow sticky worm boards; silver gray has a tendency to avoid aphids, which can be used in facility vineyards.
2. Biological control
Protect and use predators, such as predatory ladybugs, grasshoppers, spiders, aphid cocoon bees, insectivorous bugs, etc.
3. Drug prevention and treatment
It can be controlled by alternating spraying of imidacloprid and permethrin pesticides.
1. It is necessary to attach importance to mass prevention and mass governance, or unified defense and rule.
2. Perennial agricultural, physical and biological control, drug control in critical periods.
Ants protect aphids from climate and predators, transfer aphids from wilted plants to healthy plants, and tap aphids to get honeydew (a sweet liquid secreted by aphids).
The ant on the tree indicates that there are aphids in the tree, but the ant is not a good bird here (it is not a bird, it is an insect), but it is not to help humans eliminate aphids, he is to make a living for himself.
About author:: Zongqin Zhang, Ph.D., School of Wine, Northwest A&F University, Associate Professor, Master Supervisor, Expert of Heyang Grape Experiment Demonstration Station, Northwest A&F University. He is a member of the Chinese Forestry Society and the Chinese Agricultural Society. Talents of the three regions of the country, Xi'an Agricultural Science and Technology Commissioner, Yangling Agricultural Science and Technology Expert Group member.