At the rate of 1500～2000g/667m 2,the control effect of rice water weevil adults was 81.7%～100%. At the rate of 1000～2000g/667m 2,the control effect of rice water weevil larvae was 77.3%～100%; and was 60%～80% on asiatic rice borer( Chilosupressalis Walker).
Results of field trials from Hubei,Sichuan and Guangdong Provinces,showed that the efficacy to mixed imidacloprid monosultap was good,being consistant with the results in lab. The control effect was more than 97% to planthopper, 55.6%～90.6% to striped rice borer, 55.13%～95.41% to paddy stem borer,and more than 81.6% to rice leaf roller.
A BC1 population derived from a artificially selected elite clone "Populusdeltoides Bartr. CL. 'Nankang1'" with borer properties back-cross with its maleparent as materials, by using the methods of bioassay and quantitative trait locus(QTLs), the chemical plant defense mechanism was studied in the erperiment.
This article describes the bionomics of Rhytidodera bowingii White, which is an important borer of mango tree in Hainan Island, The results observed indoor in Nada of this island showed that each generation of the pest averaged 423.6 days to complete its life-cycle, of which the egg, larva, prepupa, pupal stage and adult life were 11.7, 351.4, 14, 22 and 24.5 days respectively.
These findings would consequentially contribute to the further successfully biological control of the trunk borer.
The given changes are hypothesized to result from borer influence as well as from differences in salinity and oxygen concentration in the studied regions.
The bioactivity of the aqueous extracts of the leaf and stem bark of the medicinal plant, Alstonia boonei De Wild (Apocyanaceae), against the pink stalk borer, Sesamia calamistis Hampson (Lepidoptera: Noctuidae) was studied in a laboratory bioassay.