Guava capillaries Greenidea guanzhouensis Chang., a genus of homoptera, capillary aphid family.
【Host】Guava and other fruit trees.
【Harmful】Aphid swarms guava shoots and young leaves suck sap, causing leaf crumpling and curling, severe young shoots wilting, poor growth of new shoots in the tree body, and shedding of young fruits, affecting yield. The insect body excretes honeydew, induces soot disease, and affects photosynthesis.
【Morphological characteristics】 Adult wingless female aphid, body length of about 1.6 mm, brown; compound eyes reddish brown, antennae 6 segments, grayish brown; tibial tibial segment end and claw pale gray, abdominal tube-shaped, caudal mastoid supraform tuft hair; winged fetal female aphid and wingless type are similar, wings 2 pairs of white transparent, forewing midrib is trident, wing mole light brown; wingless male aphid is similar to wingless female, the whole dark brown, hindfoot is particularly swollen; winged male aphid is similar to winged female aphid, but the third segment of the antennae has 45 sensory circles. The oval shape is oval, initially pale yellow, gradually turning yellowish brown, and finally pitch black, shiny. The nymphs have brown bodies, a pale brown ventral dorsal surface, scattered with pale black spots, and reddish-brown compound eyes.
The living habits and prevention methods refer to the first section of the first chapter on the prevention and control of orange aphids. (1) Prune the affected branches in winter, especially the late autumn shoots that are affected, reduce the population base of the overwintering insects; control the consistency of each new shoot of citrus, which is convenient for spray control. (2) Protection and utilization of natural enemies. There are many types of predators that prey on aphids, of which there are more than 30 species of ladybirds, including four-spotted ladybirds, six-spotted ladybirds, ten-spotted ladybirds, red-shouldered ladybirds, etc., as well as a variety of aphid-eating flies. (3) When aphids are widely harmed and the natural enemy population is not enough to control, spraying should be sprayed as soon as possible to protect the new shoots. Agents can be selected: 3% acetamidine microemulsion 2000 times liquid, 10% imidacloprid wettable powder 2000 ~ 3000 times liquid, 25% thiamethoxine water dispersible granules 3000 ~ 3500 times liquid, 10% acryliolamine solution 2000 ~ 3000 times liquid, 25% pyrazin thiophosphate emulsion (aphid extinction) 2000 ~ 2500 times liquid, etc.