LT-M有機添加物對白柚柑桔線蟲族群、白柚產量及品質之影響

"Effect of LTM mixture on the yield, fruit quality of shaddock and the population of citrus nematode, Tylenchulus semipenetrans Cobb., in shaddock yard."

白柚（Citrus grandis(L.) Osbeck）在台灣栽植已有170餘年歷史，目前栽培面積約有七百多公頃，大多分佈於台南縣麻豆及鹽水地區。本品種性喜高溫及日照充足的氣候，耐寒力較弱，較適合於台灣中南部地區栽培。

"Plant diseases caused by parasitic nematodes are widespread in Taiwan. The most destructive species in shaddock yard is citrus nematode, Tylenchulus semipenetrans, which causes serious diseases. Current management of citrus nematode primarily relies on application of nematicide, however, because chemicals create a potential hazard to the environment and human health, alternatives to nematicides are desirable. Based on the effectiveness of controlling tested nematodes in the greenhouse, Laboratory for Management of Plant-parasitic Nematode Diseases, Department of Plant Pathology, NCHU has developed the Lively Tiller-Management (LT-M) mixture - 40% crab shell powder, 40% castor pomace, 5% soybean powder, 10% marine algae powder and 5% molasses was formulated and added with Streptomyces saraceticus. The effect of LT-M mixture on the population of citrus nematode in shaddock yard has been conducted. The result showed that LT-M mixture, applied at the rate of 20 kg per shaddock tree, decreased significantly (P=0.05) the population density of citrus nematode compared to untreated control. Besides, LT-M mixture also increased the percentage of fruiting, number of fruit, single fruit weight and sugar content during the two harvest seasons, respectively."