The Potato Tuber Moth (Phthorimaea Operculella Zeller ) Distribution and Damage to Tobacco Plants

감자나방 (Phthorimaea opercullella Zeller)의 생분포와 피해에 관한 조사

The potato tuber moth (Phthorimaea operculella Zeller ) was surveyed for its distribution and damage to tobacco plants in field. The insect was found in all four localities examined ; Dalseong and youngdeog of Gyeongbuk Province, and Boseong and Jindo island of Cheongnam Province. About half of the tobacco plants examined contained the larvae with the highest level (76.7%)of larvae infestation in the Jindo island. In a given tobacco plant the larvae were concentrated on the first three leaves, from bottom, with 82.4 5 of the total number, and a single leaf usually has one to three larval.

煙草栽培地를 중심으로 감자나방 (Phthorimaea operculella Zeller )의 發生分布와 被害狀況을 調査한 결과 현재 慶北의 盈德, 達城 全南의 城 珍島地域 一圓에 分布되었고 煙草의 被害株率은 50%에 달하였으며 珍島地域이 767%로서 가장 심하였다. 葉位別로는 基部로 부터 3葉까지가 82.4%의 높은 被害株率을 보이며 下葉일수록피해가 심한 경향이였으며 葉當 1 ∼3마리 棲息加害하는 葉이 87.9%로 가장 많고 葉當 11마리 以上 棲息하는 葉도 있었다.