Date of this Version
Journal of Economic Entomology 52:6 (1959), pp. 1143–1145.
Oviposition by the clover root borer, Hylastinus obscurus (Marsham), is completed earlier in weakened than in vigorous plants, but development is more rapid in vigorous or lightly infested roots. High populations occurring early in the season result in plant mortality with subsequently slowed borer development.