[Objective] The paper was to understand the selectivity and transitivity characteristics of Grapholitha molesta Busck in the course of host transfer.[Method] The damage time point of G.molesta was analyzed through sex...[Objective] The paper was to understand the selectivity and transitivity characteristics of Grapholitha molesta Busck in the course of host transfer.[Method] The damage time point of G.molesta was analyzed through sex pheromone trapping technique and reaction of resistance or susceptibility of different hosts.[Result] Along with the development of fruit tree organs,G.molesta appeared certain regular dynamics.During the flowering period of fruit trees,certain peaks of G.molesta were observed in pear orchard and peach orchard,and the average trap catches were182.8 and 208.6 moths,respectively.With the growth of new shoots,fruit expansion and ripening during the growth period of fruit trees,the trap catches and damage rate of peach trees were significantly higher than those of pear trees during new shoot stage,which were 151.8 and 118 moths,11.13% and 0.05%,respectively.There were significant differences in infected shoot rate.The trap catches in pear orchard reached the maximum at fruit ripening stage,which were 102.2,192.8,36 and 61.2 moths,respectively.There were significant difference in trap catches between pear orchard and peach orchard during fruit expansion stage and fruit ripening stage.[Conclusion] The study lays a foundation for accurately promoting effective prevention and control combining biological control and chemical control against G.molesta.展开更多
文摘[Objective] The paper was to understand the selectivity and transitivity characteristics of Grapholitha molesta Busck in the course of host transfer.[Method] The damage time point of G.molesta was analyzed through sex pheromone trapping technique and reaction of resistance or susceptibility of different hosts.[Result] Along with the development of fruit tree organs,G.molesta appeared certain regular dynamics.During the flowering period of fruit trees,certain peaks of G.molesta were observed in pear orchard and peach orchard,and the average trap catches were182.8 and 208.6 moths,respectively.With the growth of new shoots,fruit expansion and ripening during the growth period of fruit trees,the trap catches and damage rate of peach trees were significantly higher than those of pear trees during new shoot stage,which were 151.8 and 118 moths,11.13% and 0.05%,respectively.There were significant differences in infected shoot rate.The trap catches in pear orchard reached the maximum at fruit ripening stage,which were 102.2,192.8,36 and 61.2 moths,respectively.There were significant difference in trap catches between pear orchard and peach orchard during fruit expansion stage and fruit ripening stage.[Conclusion] The study lays a foundation for accurately promoting effective prevention and control combining biological control and chemical control against G.molesta.
