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Proceedings of the NZ Plant Protection Conference 52 (1999): 250-253

Preliminary investigation into impact of Sitona lepidus adults on white clover seed production

P.J. Gerard, T. Eden and W. Tozer

ABSTRACT

A small plot trial was undertaken in the Waikato to determine the potential impact of Sitona lepidus adults on white clover seed production. Five densities of adult weevil were caged on 1 m2 plots from the time of peak adult emergence in November 1998 until harvest in late January 1999. In the laboratory, weevil adults were found to severely damage clover inflorescences when no leaves were present. Although feeding damage on leaves was highly visible in the field plots, with over 80% of the leaflets damaged at the highest density of 600 adults/m2, weevil adults were found to have no effect on flowering or seed production.

Keywords: Sitona lepidus, white clover, seed production.

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