Bionomics and Control of Daimio tethys moorei

Daimio tethys moorei Mabille is a major pest of Dioscorea zingiberensis C.H.Wright.It occurs 5 generations a year,overwinterting in the pupal stage in the infested rolled leaves.Adults begin to appear in the following April.85% of the adults emerge between 9:00 am and 15:00 pm.Then the adults mate and lay eggs.The duration of egg stage lies between 5 and 12 d(average 7.5d).The larvae have 5 instars.The duration of the pupal stage is 5～10 d long(average 7.5d)and that of the adults is 1～8d(average 4d).There are two major natural enemies e.g.Apanteles sp.and Brachymeria lasus(Walker).Control tests showed that spraying 2.5% of deltamethrin have the best control effect.