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【目的】蛀茎夜蛾Sesamia spp.是伊朗和其他国家(包括印度、巴基斯坦、斯里兰卡和日本)甘蔗上最具破坏性的害虫。蛀茎夜蛾幼虫钻蛀茎秆,对茎秆产生为害,降低重量和含糖量并降低甘蔗汁品质。应用抗性品种是一种有效的工具,对环境无不利影响。本研究旨在评价甘蔗商业品种对蛀茎夜蛾的抗性。【方法】在伊朗Ahwaz的Salman-Farsi Agro-industry Farms于2013-2014和2014-2015两个连续年份,采用随机区组设计进行5次重复试验。应用了CP69-1062,CP48-103,CP57-614,CP73-21,SP70-1143,IRC99-01,IRC99-02和L62-96 8个品种。在收获前,随机取20株完整的甘蔗茎秆进行蛀茎夜蛾的为害评估。记录受害茎秆百分比、被钻蛀的节间百分比(percent of internodes bored,IB)、出口孔的数目、活的蛀茎夜蛾的数目、每品种每公顷面积中蛾的繁殖量(moth production per hectare of each variety,MP)。【结果】各测定参数在品种间均存在显著差异。从被钻蛀的节间百分比和蛾的繁殖指数判断,L62-96是最敏感的品种(2014年:14.58%IB,95 200 MP/ha;2015年:16.76%IB和111 300 MP/ha),其次是CP69-1062和CP48-103;CP57-614是这两年中抗性最强的品种(2014年:1.24%IB,8 400 MP/ha;2015年:1.02%IB,7 000 MP/ha)。【结论】建议限制敏感品种的栽培,并应用其他控制措施,结合品种抗性,以治理敏感品种中的蛀茎夜蛾。
【Objective】 Sesamia spp. Is the most devastating pest on sugarcane in Iran and other countries, including India, Pakistan, Sri Lanka and Japan. Drilling moth stem moth larvae moth, produce damage to the stem, reducing weight and sugar content and reduce sugar cane juice quality. Application of resistant varieties is an effective tool that has no adverse effect on the environment. The aim of this study was to evaluate the resistance of commercial varieties of sugarcane to B. litura. METHODS: Salman-Farsi Agro-industry Farms in Ahwaz, Iran, conducted two replicate trials in two consecutive years, 2013-2014 and 2014-2015, using a randomized block design. Eight varieties of CP69-1062, CP48-103, CP57-614, CP73-21, SP70-1143, IRC99-01, IRC99-02 and L62-96 were used. Before harvesting, 20 intact sugarcane stalks were randomly selected to assess the damage to the stem borer. The percentage of damaged stalks, percent of internodes bored (IB), the number of exit holes, the number of live borer moths, the number of moth production per hectare per species (moth production per hectare of each variety, MP). 【Result】 The results showed that there were significant differences among the tested varieties. L62-96 was the most sensitive species (2014: 14.58% IB, 95 200 MP / ha; 2015: 16.76% IB and 111 300 MP / ha) as judged by the percentage of internodes that were moulted and the moth’s reproductive index , Followed by CP69-1062 and CP48-103; CP57-614 was the strongest in these two years (2014: 1.24% IB, 8.400 MP / ha; 2015: 1.02% IB, 7 000 MP / ha). 【Conclusion】 It is suggested that the cultivation of sensitive varieties should be restricted and other control measures should be used in combination with the resistance of varieties to control the stem-borer moth in susceptible varieties.