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Dr. Hiran A. Ariyawansa's Homegage

研究主題 Research Topics

臺灣蟲生真菌的分子生態學及病蟲害整合管理應用

蟲生真菌在昆蟲生物防治方面展現了卓越的潛力,廣泛應用於農業以取代傳統的殺蟲劑使用。這類真菌在形態上多樣、親緣演化上差異顯著,且在生態系統中具有極高的多樣性。以北蟲草(Cordyceps militaris 又稱蛹蟲草、北冬蟲夏草) 為例,其作為補品和傳統中藥材廣受歡迎,並能產生多種生物活性物質,包括蟲草素、多醣體、麥角固醇及纖溶酶等。

這些次級代謝物在醫療上展現出廣闊的應用前景,涵蓋抗病毒、抗真菌、抗高脂血症、抗發炎、抗白血病及抗癌等多種功效。目前,我們致力於研究臺灣蟲生真菌的分子生態學及其在病蟲害整合管理中的應用潛力。同時,我們與沈湯龍教授合作,深入分析蟲生真菌豐富的生物活性物質及其應用可能性,期望能為未來的研究與應用提供堅實的科學基礎。

The Molecular Ecology & Integrated Pest Management Applications of Entomopathogenic Fungi in Taiwan

Entomopathogenic fungi are outstanding agents for biological insect control, widely utilized in agricultural applications as alternatives to chemical insecticides. These fungi exhibit diverse morphologies, considerable phylogenetic variation, and ecological versatility. Notably, species such as Cordyceps militaris are highly valued as dietary supplements and traditional medicinal materials. These fungi produce a variety of bioactive compounds, including cordycepin, polysaccharides, ergosterol, and fibrinolytic enzymes. These secondary metabolites demonstrate promising therapeutic potential, with antiviral, antifungal, antihyperlipidemic, anti-inflammatory, antileukemic, and anticancer properties.

Currently, our research is focused on the molecular ecology of entomopathogenic fungi in Taiwan and integrated pest management strategies. In collaboration with Professor Tang-Long Shen, we are analyzing the diverse bioactive compounds produced by these fungi and exploring their potential applications.

青蔥葉部真菌病害整合管理應用

青蔥( Allium fistulosum L.) 是臺灣最重要且歷史悠久的蔬菜作物之一。目前,宜蘭三星是主要的青蔥產區,其特有的氣候條件與本地品種使得三星蔥在市場上具有極高價值。由於青蔥真菌病害傳播迅速,葉部病害對其品質及產量有顯著影響。然而,關於臺灣青蔥真菌病害的研究仍十分有限,且誤診經常對病害管理決策造成不利影響。

本研究室團隊與農業部花蓮區農業改良場合作,發現青蔥葉枯病的誤診已成為三星地區病害管理的一大問題。因此,迫切需要研發新的方法,以提供準確的病害控制,並有效減少化學藥劑帶來的環境負擔。此研究的主要目標有三:(一)鑑定普遍引起青蔥病徵的病原菌;(二)探討這些病原菌的流行病學特性;(三)評估病原菌對殺真菌劑的敏感性,並篩選出最佳藥劑以用於真菌性葉部病害的控制。我們期望能以減少化學殺真菌劑的使用為原則,建立一套青蔥真菌性葉部病害的綜合管理方法。

Integrated Management of Foliar Fungal Diseases in Scallion Leaves

Scallion (Allium fistulosum L.) is one of Taiwan's most important and historically significant vegetable crops. Currently, Sanxing in Yilan is the primary production area for scallions, characterized by unique climatic conditions and local cultivars that confer high market value. Rapid spread of fungal diseases in scallion foliage significantly impacts its quality and yield. However, research on scallion fungal diseases in Taiwan remains limited, often leading to misdiagnosis that adversely affects disease management decisions.

In collaboration with the Hualien District Agricultural Research and Extension Station of the Ministry of Agriculture in Taiwan, our research team has identified misdiagnosis of scallion leaf blight as a major issue in disease management in the Sanxing region. Therefore, there is an urgent need to develop new methods to accurately control these diseases and effectively reduce environmental burdens associated with chemical pesticide use. This study aims to achieve three main objectives: (1) identify common pathogens causing symptoms of scallion diseases; (2) investigate the epidemiological characteristics of these pathogens; and (3) evaluate the sensitivity of pathogens to fungicidal agents, screening for optimal chemicals to control fungal foliar diseases. Our goal is to establish an integrated management approach for scallion fungal foliar diseases, prioritizing reduced use of chemical fungicides.