早期抽取幼虫样本,使哥伦比亚甘中茎虫的积极管理成为可能
Gerson Darío Ramírez-Sánchez1, Claudia Echeverri-Rubiano1, Juan Manuel Valencia-Correa1
1Colombian Sugarcane Research Center (Cenicaña), Valle del Cauca, Colombia.
Journal of economic entomology
|January 22, 2026
概括
在甘干 (Diatraea spp.) 的季节早期监测. 在哥伦比亚可以预测未来的害虫压力. 每次采样工作的30个幼虫的门建议启动生物控制增强计划,以有效管理.
科学领域:
- 农业昆虫学 农业昆虫学
- 虫害管理 虫害管理 虫害管理
- 生物控制 生物控制
背景情况:
- 甘树干 (Diatraea spp.) 是一种可怕的植物. 哥伦比亚Cauca河谷 (CRV) 的管理主要使用生物控制.
- 目前的方法依赖于收获损害评估,为下一个作物周期安排生物控制剂的释放.
- 在作物周期期间进行主动监测可以提高自然敌人释放与害虫压力的对齐.
研究的目的:
- 调查早期季节幼虫数量与甘干的收获损害之间的关系.
- 确定季节早期监测是否可以预测未来的害虫水平,并为生物控制策略提供信息.
主要方法:
- 2013年至2015年间,在CRV的644个商业甘田中进行了幼虫采样,在出现后不到3个月.
- 在收获时从535个田地收集了受伤数据 (%内节点受伤).
- 用地缘统计工具和中位测试来分析早期幼虫数量与收获损害之间的相关性.
主要成果:
- 幼虫数量在每次采样工作中从0到48不等,而干损伤在内部节点中从0%到22%.
- 在CRV的北部和中部地区观察到的幼虫数量和损害最高.
- 早期季节的幼虫数量与前一个作物周期的收获损害相关.
结论:
- 收获时有4%的内部节被钻过的田地显示,在下一作物中,每个样本的幼虫超过30个的可能性很高.
- 每2人/小时采样量≥30个幼虫的早期季节值可能是启动生物控制增强计划的可靠指标.
- 这种主动监测方法可以提高对甘茎虫的害虫防治策略的时间和有效性.
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