• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Economic Entomology >Effect of Planting Date on Lissorhoptrus oryzophilus (Coleoptera: Curculionidae) Density-Yield Relationship on Rice in Southeastern Texas
【24h】

Effect of Planting Date on Lissorhoptrus oryzophilus (Coleoptera: Curculionidae) Density-Yield Relationship on Rice in Southeastern Texas

机译：播种期对德克萨斯州东南部稻米稻纵卷叶（（Coleoptera：Curculionidae）密度-产量关系的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Results of planting date and insecticide efficacy experiments targeting Lissorhoptrus oryzophilus Kuschel (Coleoptera: Curculionidae) on rice, Oryza sativa L., in Southeastern Texas between 2002 and 2007 were used to determine density-yield relationships as a function of planting date. Soil core samples were collected on two dates during main crop development to estimate immature L. oryzophilus populations followed by main and ratoon crop harvests. Analysis of covariance (ANCOVA) revealed that planting date did not affect the density-main crop yield relationship during most years and that these relationships varied substantially among years. For ratoon crop yield, an effect of main crop L. oryzophilus immature infestation was detected during some years, but the real effect of these populations on ratoon crop yield remains unclear. Using estimates of yield reduction per L. oryzophilus immature, economic injury levels were calculated. Main crop yields from treated plots and first soil core sample L. oryzophilus immature populations from untreated plots were significantly higher in plots planted at recommended dates than in plots planted earlier or later. This suggests that the presence of high populations of reproductive L. oryzophilus coincides with the period when rice fields planted at optimum dates are flooded. Results from this study reinforce the importance of managing L. oryzophilus populations when planting rice at recommended dates in southeastern Texas.
机译：以2002年至2007年间在德克萨斯州东南部水稻Oryza sativa L.上针对水稻拟南芥（Lysorhoptrus oryzophilus Kuschel）的播种日期和杀虫功效实验的结果，确定密度-产量关系随播种日期的变化。在主要作物生长的两个日期收集土壤核心样品，以估计未成熟的L. oryzophilus种群，然后是主要作物和再生作物。协方差分析（ANCOVA）显示，播种日期在大多数年份中均不影响密度与主要作物产量的关系，并且这些关系在不同年份之间存在很大差异。对于再生农作物的产量，在某些年份中已检测到主要农作物嗜麦芽孢杆菌未成熟侵染的影响，但是这些种群对再生农作物产量的实际影响仍不清楚。使用每个未成熟的米曲霉的产量降低的估计，计算经济损害水平。在推荐日期播种的地块中，处理过的地块和未经处理的地块的第一土壤核心样品原产L. oryzophilus未成熟种群的产量明显高于早晚种植的地块。这表明存在大量繁殖的米曲霉，与在最佳时期种植的稻田被淹的时期相吻合。这项研究的结果加强了在德克萨斯州东南部在推荐的日期播种水稻时管理米果乳杆菌种群的重要性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号