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Population Fluctuation of the Melon Fly, Dacus cucurbitae, in Northeastern Taiwan

台灣東北部瓜實蠅(Dacus cucurbitae)棲群變動之研究

摘要


The population fluctuation of the melon fly, Dacus cucurbitae was investigated in northeastern Taiwan. The study was conducted from both along the coastal plain of Pacific Ocean and nearby inland areas of I-Lan County from June, 1989 to the end of September, 1991. The highest population density of the melon fly was observed in July and August; it then decreased in September and reached its lowest level from December to May. Higher temperatures, a longer duration of sunshine, and increased plantation activity were the most important factors influencing the population density of the melon fly in these areas.

並列摘要


本文係研究台灣島最靠近日本琉球群島之東北部地區-宜蘭縣內瓜實蠅,melon fly:Dacus cucurbitae棲群變動。研究場所係選擇蘭陽地區及蘇澳鄉的太平洋沿岸之主要哈密瓜類生產專業區:壯圍和南澳;內陸平地五結鄉苦瓜種植區和靠山之大湖瓜類種植區。研究時間係於民國78年6月至民國80年9月底。平均瓜實蠅棲群密度最高發生於7和8月間,9月遽減,12月至翌年5月最低,密度之變化受溫度、日照及瓜類作物生長時期之影響。

並列關鍵字

瓜實蠅 棲群變動 瓜類 溫度 日照 作物生長期

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