檬果螟蛾(Chlumetia transversa Walker)為害情形之觀察及其藥劑防除試驗

Abstract

(一) 檬果螟蛾（Chlumetia transversa Walker）幼蟲蛀食花穗及嫩梢為害，蛀成隧道，使之不能結果或萎凋枯死。其為害率在12.93~23.52%，檬果每年損失額高達2,925,522.3元～5,321,599.7元。 本研究乃求明瞭檬果螟蛾週年之為害情形及試驗有效藥劑的防除方法，以便有利於檬果增產。 1. The larvae of mango twig-borer (Chlumetia transversa Walker) bore into the twigs both of young shoots and inflorescences of mango trees and cause them wilting or unfruitfulness. The damage percentage of this pest reaches 19.93-23.52% per year and equals to a loss of NT$ 2,925,522.3-5,321,599.7 in this island. 2. An observation on the conditions of damage caused by the mango twig-borer was carried out in July, 1965 to June, 1966 at the mango orchard of Fengshan Tropical Horticultural Experiment Station.