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棉花占主导地位的景观,载体丰富度和温度的影响 棉花叶卷 矮人病毒在棉花中的发生率
John W Mahas1, Phillip M Roberts2, Kassie Conner3
1Auburn University, Entomology and Plant Pathology, Auburn, Alabama, United States; jwm0055@auburn.edu.
Phytopathology
|February 13, 2026
概括
高温和棉花的流行增加了棉花叶卷矮人病毒 (CLRDV) 的传播,由棉花虫 (Aphis gossypii) 传播. 了解这些因素有助于管理棉花田中的CLRDV发病率.
科学领域:
- 农业昆虫学 农业昆虫学
- 植物病理学 植物病理学
- 生态生态学 生态生态学
背景情况:
- 载体传播的植物病原体,如棉花叶卷矮人病毒 (CLRDV),对棉花 (Gossypium hirsutum L.) 生产构成重大威胁.
- 棉花花 (Aphis gossypii) 传播的CLRDV在不同地区的发病率各不相同,因此需要确定导致的因素.
- 对CLRDV的有效管理策略依赖于了解生物和非生物影响对其传播的相互作用.
研究的目的:
- 调查影响棉花叶卷矮人病毒 (CLRDV) 在棉花田中的发生率的关键生物和非生物因素.
- 确定与CLRDV.高风险地区相关的景观和环境变量.
- 阐明Aphis gossypii,环境条件,景观组成和CLRDV传播之间的因果关系.
主要方法:
- 从2021年到2022年,在阿拉巴马州和乔治亚州进行了实地调查,收集了关于Aphis gossypii,自然敌人,CLRDV杂草宿主,CLRDV发病率,景观组成,温度和降水量的数据.
- 使用导向非循环图 (DAG) 框架的结构因果建模用于分析各种因素对CLRDV发病率的意义.
- 统计分析对测量变量之间潜在的混影响进行了控制.
主要成果:
- 鉴定出Aphis gossypii的丰富性,景观中棉花的普遍性和温度是CLRDV发病率的显著积极驱动因素.
- 温度对Aphis gossypii的数量有显著的积极影响,间接影响了CLRDV的发生率.
- 在这项研究中,其他调查因素,包括自然敌人和杂草宿主,并未被发现是CLRDV发病率的显著预测因素.
结论:
- 棉花景观的流行和高温是推动CLRDV传播的关键因素,其媒介是棉花虫种群的增加.
- 这些发现为CLRDV的区域风险因素提供了新的见解,使得有针对性的管理干预措施成为可能.
- 未来的研究可以利用这些已识别的驱动因素来改善CLRDV发病率的空间和时间预测,支持棉花生产中的积极疾病管理.
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