エゾマツカサアブラムシの幹母に対するエゾマツ幼齢木の抵抗性

概要

論文の詳細を見る
Fecundity of the winged form of Adelges japonicus MONZEN, mortality of the following generation (fundatrix), and the number of galls caused by the fundatrices were examined using individuals that were oviposited artificially on galled or ungalled young Picea jezoensis CARR. trees in a monospecific plantation. Five galled and four ungalled trees were selected based on the number of galls formed during the six to nine years prior to the artificial oviposition. During this period, a large number of galls formed on galled trees but no galls were produced on ungalled trees. Neither the number of eggs deposited by the winged form, nor the number of pre-overwintering fundatrices differed between galled and ungalled trees. However, mortality rates differed significantly in the overwintering period, and fundatrices became more numerous on galled trees in mid-April. As a result, the mean number of galls on galled trees became larger than that on ungalled trees. This indicates that ungalled trees are resistant to the infestation by fundatrix.
一般社団法人日本森林学会の論文
1991-11-01