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首页> 外文期刊>Nepal Journal of Science and Technology >Assessment of Yield Loss in Maize due to Attack by the Maize Borer, Chilo partellus (Swinhoe)
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Assessment of Yield Loss in Maize due to Attack by the Maize Borer, Chilo partellus (Swinhoe)

机译：评估由于玉米Chi虫（Chilo partellus（Swinhoe））的侵袭造成的玉米产量损失

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The maize borer, Chilo partellus (Swinhoe), is one of the major biotic constrains reducing maize productivity in Nepal. Summer maize is infested mainly by it rather than by other insect species in Nepal. National Maize Research Program (NMRP)-Rampur farm was considered as a potential spot for this study where summer maize is highly infested every year by this pest. This study was conducted during the summers of 2004 and 2005 with an objective of assessing the loss by it in maize. A maize variety, Arun-2, was used in this study. Yield loss by this pest was estimated by obtaining the yield difference between the chemically protected and unprotected maize plants. Number of plant stands, number of stem breakage, number of ears harvested, number of poor cobs, 1000 grain weight, and stem tunneling were also recorded as the yield affecting factors. The yield difference was significantly less (by 28%) in unprotected maize as compared to protected maize. Number of plant stands, number of ears harvested and 1000 grain weight were found less (by 8.5, 14, and 6%, respectively) whereas number of stem breakage, number of poor cobs, length of tunnels per plant and per tunnel length were found higher (by 16, 6, 30, and 24%, respectively) in unprotected maize. This study has suggested that application of plant protection measures against C. patellus can significantly increase maize productivity and hence can greatly contribute in poverty alleviation in Nepal. Key words: maize borer; Chilo partellus ; yield loss assessment; maize DOI: 10.3126jst.v11i0.4085 Nepal Journal of Science and Technology 11 (2010) 25-30 Normal 0 false false false MicrosoftInternetExplorer4 The maize borer, Chilo partellus (Swinhoe), is one of the major biotic constrains reducing maize productivity in Nepal. Summer maize is infested mainly by it rather than by other insect species in Nepal. National Maize Research Program (NMRP)-Rampur farm was considered as a potential spot for this study where summer maize is highly infested every year by this pest. This study was conducted during the summers of 2004 and 2005 with an objective of assessing the loss by it in maize. A maize variety, Arun-2, was used in this study. Yield loss by this pest was estimated by obtaining the yield difference between the chemically protected and unprotected maize plants. Number of plant stands, number of stem breakage, number of ears harvested, number of poor cobs, 1000 grain weight, and stem tunneling were also recorded as the yield affecting factors. The yield difference was significantly less (by 28%) in unprotected maize as compared to protected maize. Number of plant stands, number of ears harvested and 1000 grain weight were found less (by 8.5, 14, and 6%, respectively) whereas number of stem breakage, number of poor cobs, length of tunnels per plant and per tunnel length were found higher (by 16, 6, 30, and 24%, respectively) in unprotected maize. This study has suggested that application of plant protection measures against C. patellus can significantly increase maize productivity and hence can greatly contribute in poverty alleviation in Nepal. Key words: maize borer, Chilo partellus , yield loss assessment, maize
机译：玉米bore Chilo partellus（Swinhoe）是降低尼泊尔玉米生产力的主要生物约束之一。在尼泊尔，夏季玉米主要受其侵染，而不是其他昆虫物种侵染。国家玉米研究计划（NMRP）-Rampur农场被认为是该研究的潜在场所，每年夏季玉米均受到该害虫的严重侵害。这项研究是在2004年和2005年夏季进行的，目的是评估玉米在玉米中造成的损失。这项研究使用了玉米品种Arun-2。通过获得化学保护的和未保护的玉米植物之间的产量差异，可以估算这种害虫的产量损失。还记录了林分数量，茎折数量，收获的穗数，穗轴数不足，1000粒重和茎隧穿等作为产量影响因素。与受保护的玉米相比，未受保护的玉米的产量差异要小得多（28％）。发现的林分数量，收获的穗数和1000粒重较少（分别减少8.5％，14％和6％），而发现茎破裂的数量，不良穗轴的数量，每株植物的隧道长度和每条隧道长度未受保护的玉米的含量较高（分别增加16％，6％，30％和24％）。这项研究表明，针对against蛾的植物保护措施的应用可以显着提高玉米的生产力，因此可以为尼泊尔的减贫做出巨大贡献。关键词：玉米bore part;;产量损失评估;玉米DOI：10.3126 / njst.v11i0.4085尼泊尔科学与技术杂志11（2010）25-30正常0假假否MicrosoftInternetExplorer4玉米bore Chilo partellus（Swinhoe）是降低玉米生产力的主要生物约束之一。尼泊尔在尼泊尔，夏季玉米主要受其侵染，而不是其他昆虫物种侵染。国家玉米研究计划（NMRP）-Rampur农场被认为是该研究的潜在场所，每年夏季玉米均受到该害虫的严重侵害。这项研究是在2004年和2005年夏季进行的，目的是评估玉米在玉米中造成的损失。这项研究使用了玉米品种Arun-2。通过获得化学保护的和未保护的玉米植物之间的产量差异，可以估算这种害虫的产量损失。还记录了林分数量，茎折数量，收获的穗数，穗轴数不足，1000粒重和茎隧穿等作为产量影响因素。与受保护的玉米相比，未受保护的玉米的产量差异要小得多（28％）。发现的林分数量，收获的穗数和1000粒重较少（分别减少8.5％，14％和6％），而发现茎破裂的数量，不良穗轴的数量，每株植物的隧道长度和每条隧道长度未受保护的玉米的含量较高（分别增加16％，6％，30％和24％）。这项研究表明，针对against蛾的植物保护措施的应用可以显着提高玉米的生产力，因此可以为尼泊尔的减贫做出巨大贡献。关键词：玉米bore; Chilo partellus;产量损失评估;玉米

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