• 作者： 彭武康
• 作者服務機構： 國立臺灣大學植物病蟲害學系
• 中文摘要： 本省目前栽植的水稻有蓬萊、在來、長粒秈稻及糯稻等四型。水稻收穫後，不論民問或政府，均按不同型種分倉貯藏。前三型稻穀在倉貯期問，鞘翅類害蟲發生情形，曾於本省中部及南部共十個農會穀倉作12次取樣調查。每次每一型種取穀樣 500 ml，重複20次。原始資料經ln(X+0.5)轉換後，採用綜合分析法作變方分析。 結果發現穀樣中之鞘翅類害蟲共13種。其中穀蠹 (Rhyzopertha dominica (Fabricius))、角胸粉扁蟲 (Cryptolestes ferrugineus (Stephens))、暹羅穀盜 (Lophocateres pusillus Klug)及米象(Sitophilus oryzae (Linnaeus))等四種較為重要。前三種在倉貯之蓬萊稻中之密度較長粒秈稻者為高，且有顯著差異。而米象之結果正好相反，即在長粒秈稻之密度顯較蓬萊稻為高。綜合全部鞘翅類之結果，顯示害蟲密度在蓬萊稻顯然較在來稻或長粒秈稻者為高。 鞘翅類害蟲所造成之損失量並不純粹取決於其密度，而與各蟲種－生食物消耗量和其密度之乘積有關。由此資料估算鞘翅類害蟲為害本省倉貯稻穀之損失量以長粒秈稻為最嚴重，次為在來稻，蓬萊稻再次之。而在米象發生嚴重地區，長粒秈稻之損失將更為嚴重“
• 英文摘要： Four types of rice were grown in Taiwan.They were japonica, indica, long grain indicaand glutinous rice. After the harvest, they werestocked separately with the type of the riceeither at private or official warehouses. The occurrence of the Coleopterous insectpests in the first three types were investi-gated during the period of their storage. Thesampling was conducted 12 times at rice store-houses which belonged to 10 different Farmers'Associations. Each sample consisted of 500mlrice and 20 samples were examined per typerice at each time. Thirteen species of the Coleopterous insectswere identified from the collected samples.Among them, Sitophilus oryzae (Linnaeus), Rhyzo-pertha dominica (Fabricius), Cryptolestes ferrugi-neus Stephens, and Lophocateres pusillus Klugwere the prevailing members. Comparing thedensities in the japonica, indica, and long graininidica type rice, the density of S. oryzae wassignificantly higher in the long grain indica type.However, the other three beetles were moredominant in japonica type than in indica orlong grain indica type rice. It was reported that the amount of foodconsumption per individual in life was variablefrom species to species, e.g., S. orpzae and R.dominica consumed 59.06 and 30.45 mg of brownrice, respectively. Therefore, the damage to thestored rice by each beetle is evidently propor-tioned to the product of the population densityby the amount of its food consumption. It ispostulated that the loss of stored．long grainindica type rice by the beetles was more seriousthan the indica or japonica type. In case ofmore severe infested by S. oryzae, the loss oflong grain indica rice may be more serious.
• 中文關鍵字： --
• 英文關鍵字： --