THE MITE ALLOTROMBIUM SP.——A NEW PREDATOR OF TINGID HEGESIDEMUS HABRUS DRAKE

The mite,Allotrombium sp.is a predator of the tingid,Hegesidemus habrus.It has one generation a year in Beijing and Lin Yi area,Shangdong province.It overwinters in the adult stage and eggs are laid in the soil in the following spring.Both the nymph and adult of this mite.can prey on the tingid nymph.The population of the tingid could be controlled by the mite.It is found that the cabbage aphid,Brevicoryne brassicae can be used as food for the mite.The peroid of the mite's life cycle can be shortened,if the mite is reared with this aphid.Releases were made according to the predator:pest ratio as 1:50.The population of the tingid could be reduced by 76.01%.The effect of mass-releasing of this mite in young stands is quite promising.Generally,its colony is easy to be established.