• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国政府科技报告 >Brown Spot Needle Disease. Biology and Control in Scotch Pine Plantations.
【24h】

Brown Spot Needle Disease. Biology and Control in Scotch Pine Plantations.

机译：褐斑病针。樟子松人工林的生物学与防治。

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Scotch pine (Pinus sylvestris) Christmas tree plantations in seven midwestern States have been severely damaged since 1967 by the brown spot needlecast disease, Scirrhia acicola. Fungicide trials have shown that chlorothalonil and Bordeaux misture will provide excellent control of this disease. Life cycles have shown that most brown spot needle infection occurs in late June and early July in the midwestern States. Defoliation occurs in late September, October, and November. Host range studies revealed short-needled Scotch pine varieties to be highly susceptible to brown spot. New needles on red pine (Pinus resinosa) seedlings are resistant to older needles are moderately susceptible. Cultural practices such as planting resistant varieties and shearing trees during dry weather will reduce plantation losses.

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