Experiment on the Feeding of Lymantria dispar L. by Artificial Diet
Wang Zhiying(Northeast Forestry University, Harbin 150040, P. R. China); Wang Xiuguo(Daxing’anling Forestry Administration Bureau of Heilongjiang Province); Wang Lijun(The Poplar Institute of Liaoning Province)
Artificial diet was used to feed Lymantria dispar L. in the year of 2000 and 2001, and leaves of oak were used as control. The average developmental durations of larvae from 1 instar to 6 instars fed by artificial diet are 15,6,6,7,9 and 14 days, respectively, and the general developmental duration of larvae is 57 d. While the average developmental durations for those larvae fed by leaves of oak are 12, 6, 6, 6, 8 and 14 days, respectively, and the general developmental duration of larvae is 52 d. Judging from head width and body length of Lymantria dispar larvae, the differences of larvae from 1 to 4 instars are not significant, but the average head width of larva of 5 and 6 instars fed by artificial diet is 1mm more than those fed on leaves of oak, and the average body length is about 2.4 mm longer.
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