Studies on bioecology and control technique of genaparlatoria pseudaspidiotus lindinger

This paper deals with the bio-ecology and control technique of the scale in-sect Genaparlatoria pseudaspidiotus.The results show that the insect has one generation ayear and the females overwinter on the leaves of the host,Qycas revoluta. An age-specificlife table is set up and a figure is given for explaining the relationships between populationdynamic and restraint factors.The lethal factors are high temperature,predation ofladybugs and parasite of chalcids.The key stage of the pest is first instar larva and themain dispersal period of the first instar larva is the second and last ten-days of April.Theladybugs and chalcids are most active from May to July and form the first ten days of Oc-tober to the second ten days ofNovember.The control norm is that the larva has increasedup to 16 individuals on a leaf ofthe host.A good control method to the pest is using 1:1500 diluted solution of 40% dimethoate during the second ten days of April.The mortali-ty is 92.2% and the natural enemies are protected,too.