White clover and grass grub

摘要

Seventy-four overseas lines of white clover were screened for resistance and tolerance to grass grub in a pot experiment in which insect weight gains and plant fresh weights were recorded. There were no differences in individual mean weights of larvae between lines at the end of the experiment. Differences in insect survival were large and could be related to the type of plant. Survival was highest on large-leaved vigorous lines and lowest on small-leaved poor vigour lines. Potentially resistant and tolerant lines of white clover have been identified for further testing.