...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Biological Conservation >Agricultural insect pest compromises survival of two endemic Braya (Brassicaceae).
【24h】

Agricultural insect pest compromises survival of two endemic Braya (Brassicaceae).

机译：农业昆虫害虫损害了两个地方性 Braya （十字花科）的生存。

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

Agro-ecosystems support a vast array of non-native insects, but the potential of these insects to invade and degrade natural ecosystems is largely unknown. Plutella xylostella L. (diamondback moth) is a global agricultural pest that is not native to North America. It feeds on members of the Brassicaceae family, including the endangered Braya longii (Fernald) (Long's braya) and threatened B. fernaldii (Abbe) (Fernald's braya) which are endemic to the limestone barrens of Newfoundland, Canada. The immigration of P. xylostella from overwintering sites in the United States to this rare natural ecosystem was monitored with pheromone traps between 2003 and 2005. After their mass immigration in early summer, females lay eggs on an average of 30% of the B. longii and 16% of the B. fernaldii population. Larval feeding reduces the mean seed output of infested plants by 60%, from 10.8 to 4.3 seeds/fruit, and damages 26% of their leaves. There are residual and long-term effects of this herbivory, as many dead braya had higher numbers of eggs, and subsequent leaf and fruit damage one to three years before they died. High summer air temperatures and low precipitation allowed this pest to become multivoltine, resulting in additive damage to braya individuals. Presently, insufficient attention is directed to the impacts of agricultural pests on native ecosystems and rare host plants; hence, there is a need for both the conservation and agricultural communities to cooperate in mitigating the impacts of these pests on native biodiversity.
机译：农业生态系统支持各种各样的非本地昆虫，但这些昆虫入侵和破坏自然生态系统的潜力在很大程度上尚不清楚。小菜蛾（Plutella xylostella L.）是一种全球性农业害虫，并非北美原产。它以十字花科家族的成员为食，其中包括濒临灭绝的 Braya longii （Fernald）（Long's braya）和受威胁的 B。 fernaldii （Abbe）（Fernald's braya），是加拿大纽芬兰的石灰石贫瘠地区特有的。 P的移民。 2003年至2005年之间，用信息素诱捕器监测了从美国越冬地点到这种罕见的自然生态系统的小菜蛾。在初夏大规模迁徙后，雌性平均产卵量达 B> 30％ 。 longii 和 B的16％。 fernaldii 人口。幼虫喂养使受侵染植物的平均种子产量降低了60％，从10.8种子/果实减少到4.3种子/果实，并损害了其叶的26％。这种草食有残留和长期的影响，因为许多死亡的布雷亚产卵数量更高，并且在它们死亡前一到三年对叶子和果实造成损害。夏季高温和低降水使这种有害生物变成多伏特，对流浪汉个体造成累加损害。目前，对农业害虫对当地生态系统和稀有寄主植物的影响的关注不足。因此，养护界和农业界都需要合作以减轻这些害虫对当地生物多样性的影响。

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