Red spider and its control methods

Harm: the red spider is so small that it is easy to see it with a magnifying glass. Often gather on the back of the leaves, sucking juice, resulting in silver-white or white spots on the surface. Serious leaf back can find screen, spray water droplets attached to the above will reflect light, but also can not see the red spider with silk web.

Red spiders are easy to produce in dry and hot environment, and can reproduce rapidly above 24 ℃. General insecticides can not kill them, so acaricides must be used to kill them.

Prevention and cure method

1. Observe the leaf back of orchid plant from time to time, and the harmful situation will be eliminated immediately.

two。 Can be sprayed with a variety of acaricides, such as 48% acaricide EC 2000 times or 1.8% avermectin EC (acarine, alfordine) 2000 times solution.