Feeding Selectivity of Larvae of Biston suppressariaon Different Hosts

In 2022,the feeding selectivity of larvae of Biston suppressaria to four different hosts was studied by means of random selection and pairwise test.The results showed that in the random selection experiment,the feeding probabilities of the larvae on Eucalyptus urophylla×Eucalyptus grandis,Vernicia fordii and Triadica sebifera were higher,separately with an average of 0.35,0.31 and 0.31,which were significantly higher than that on Camellia oleifera.There were also significant differences on the feeding ratios of the four hosts,highest by V.fordii (42.90%) and T.sebifera (37.72%),followed by E.urophylla×E.grandis (28.37%),and C.oleifera (8.13%) was the least eaten.In the pairwise test,there were no significant differences between the feeding frequencies of the larvae on E.urophylla×E.grandis,V.fordii and T.sebifera,but they were significantly higher than that of C.oleifera.The experimental results proved that the larvae of B.suppressaria had an obvious feeding preference for V.fordii,T.sebifera and E.urophylla×E.grandis,but did not prefer to feed on C.oleifera.However,the feeding proportion of V.fordii or T.sebifera in leaf plates was significantly higher than that of E.urophylla×E.grandis.The research results can provide reference for exploring the disaster of B.suppressaria.