首页> 外文期刊>Journal of Agriculture of the University of Puerto Rico >Sequential sampling plan for corn earworm, Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae), in corn fields on the south coast of Puerto Rico.
【24h】

Sequential sampling plan for corn earworm, Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae), in corn fields on the south coast of Puerto Rico.

机译:在波多黎各南海岸的玉米田中,对玉米ear虫(Helicoverpa zea (Boddie)(鳞翅目:夜蛾科))的顺序采样计划。

获取原文
获取原文并翻译 | 示例
           

摘要

The corn earworm, Helicoverpa zea (Boddie), is the major insect pest of corn, Zea mays L., in Puerto Rico. The objective of this study was to design a sequential sampling plan with fixed precision levels for H. zea (Boddie) in corn fields on the south coast of Puerto Rico. For determining the presence (=1) or absence (=0) of H. zea eggs, 25 corn plants were randomly sampled from December 2003 to March 2004. Data were analyzed by using the beta binomial distribution. Critical density levels of 0.10 and 0.08 infested plants, before and after the emergence of ear silks, were used for Iwao's and converging lines formulae. A converging line sampling plan is recommended because it selected a smaller average sample size. This plan can be used to make cost effective control decisions on field corn in Puerto Rico.
机译:玉米穗虫 Helicoverpa zea (Boddie)是波多黎各的玉米主要病虫害 Zea mays L.。这项研究的目的是为H设计一个固定精度水平的顺序采样计划。玉米(Boddie)在波多黎各南海岸的玉米田中。用于确定H的存在(= 1)或不存在(= 0)。玉米卵,从2003年12月至2004年3月,随机抽取了25种玉米植株。通过使用beta二项式分布对数据进行了分析。在穗丝出现之前和之后,将0.10和0.08的临界密度水平侵染的植物用于Iwao和收敛线公式。建议使用收敛线采样计划,因为它选择了较小的平均样本量。该计划可用于对波多黎各的田间玉米做出具有成本效益的控制决策。

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