除了藥劑防治外，根據梨木蝨的危害習性及梨園管理狀況，尚可共同採 用下列措施進行防治：(1) 冬季落葉、清理果園時全面施用藥劑，減少越冬 蟲數；(2) 春天梨樹開始冒出新葉後即連續定期施藥，此時梨木蝨越冬成蟲 開始出來產卵，初孵出的初齡若蟲對藥劑敏感，較易防治，待若蟲較大，開 始分泌蜜露時，藥劑不易接觸蟲體，即很難防治；(3) 梨果套袋亦可避免梨 木蝨在果柄及果臍處藏匿危害，但在套袋前最好全園施藥一次，待藥液乾 後，即迅速套袋，封口時需將鉛線緊貼果梗確實封好，以避免梨木蝨若蟲爬 入危害。(4) 梨木蝨成蟲具飛翔能力，防治時宜採區域共同防治，以提高防 治效果。
(二) 梨衰弱病之防治
化學防治
植物菌質體因有對四環黴素敏感的特性，美國曾在梨衰弱病罹病園 內，大規模使用四環黴素防治梨衰弱病，在梨果收穫及梨樹落葉期間，由樹 幹注射藥液，之後隔年或 2 年後再注射。處理後樹勢明顯恢復，產量亦為 注射前之 2 倍，爾後再度出現病徵時再繼續注射 (Beutel et al., 1977)。但因 抗生素主要在莖部傳輸，只有極少部分到根部，因此對在根部內的菌質體影 響較小，因此當抗生素藥效消退時，根部內的菌質體會再擴展至莖部。而冬 季時篩管自然退化，菌質體也因此只能潛藏在根部越冬，待來年春季新的韌
其他防治方法
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林映秀。2004。梨園木蝨之生態特性及防治簡介。農業世界雜誌 247: 8-12。
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劉秀玲、劉淑玲、楊曼妙、林長平。2007。台灣梨衰弱病之媒介昆蟲與發病生態 之探討。植物保護學會會刊 4: 13-26。
劉敬蘭。2001。中國梨木蝨分泌物組成及霉變原因研究 (簡報)。河北農業大學學 報 24: 110-112。
魏巍、孔雲、張玉萍、王美超、李振茹、姚允聰。2010。梨園芳香植物間作區中 國梨木蝨與其天敵類群的相互作用。生態學報 30: 2063-2074。
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Pear psyllids are a group of psylla that infests pear trees. There are two pear psyllids found in pear orchards in Taiwan. Cacopsylla qianli (Yang and Li) was first reported in 1994, but it is rarely seen today. Later on, the other psylla, Cacopsylla chinensis (Yang and Li) discovered in 2002 has become the most economically important pest in pear orchards in Taiwan. They damage pear trees by sucking the tree with piercing mouth and excreting the honeydew which caused the black sooty mould.
C. chinensis was confirmed as the vector of the pear decline (PD) disease by transmission trails. There are two types of PD-infecting phytoplasma, PDTW (16SrX) and PDTWⅡ(16SrⅡ), that cause pear decline, leaf curl and abnormal reddening of leaf colors in Taiwan. The biology, distribution, and transmission of C. chinensis and pear decline and the integrated control measure for both collectively were to be discussed.