キンモンホソガの個体群に関する研究 : II.逐次抽出法による園内密度の推定

概要

論文の詳細を見る
The distribution pattern of the apple leaf miner, Lithocolletis ringoniella MATSUMURA, was analyzed by the m-m relationship proposed by IWAO (1968). As a primary sampling unit a standing apple tree was randomly selected in a given orchard in all cases, while the secondary unit was varied case by case : for the first generation a leaf cluster and for 2-4th generations a leaf at the middle part of a shoot. In the fourth generation a leaf on a secondary growth shoot was also taken as the secondary unit independent from the one on an ordinary shoot if such shoots were abundant in a given tree. The values of a estimated for within-tree distribution were larger than zero in all cases while the values of β were larger than unity in the first and in 2-4th generations but smaller than unity in the secondary shoot growth in the last generation. The reasons for these were discussed in detail. All the values of both α and β, estimated for pooled distribution, were larger than those for within-tree distribution except for β in secondary growth shoots. Using these values, some examples of stop line of sequential sampling, proposed recently by KUNO (1969) to estimate the mean density in a given orchard were shown.
日本応用動物昆虫学会の論文
1971-12-25