レンゲソウにおけるアルファルファタコゾウムシの卵塊サイズの変異と茎径との関係

Abstract

Variation in the egg mass size of Hypera postica was examined in relation to the stem diameter of Astragalus sinicus collected at Hioki, Kagoshima Prefecture, in 1993. The number of eggs per egg mass varied from 1 to 48 (mean=11.7) ; the number of egg masses containing 4-6 eggs accounted for 23% of the total egg mass number. The frequency distribution of egg mass sizes was similar to a lognormal distribution, and a clear relationship between the stem diameter of A. sinicus and egg mass size was not detected.