The role of carbon dioxide as an orientation cue for western corn rootworm larvae within the maize root system: implications for an attract-and-kill approach.
The role of carbon dioxide as an orientation cue for western corn rootworm larvae within the maize root system: implications for an attract-and-kill approach.
复制标题
二氧化碳作为玉米根系统内西方玉米根虫幼虫的定向线索的作用：对吸引和杀死方法的影响。
DOI：
10.1002/ps.3602
复制
发表时间：
2014
影响因子：
4.1
通讯作者：
S. Vidal
中科院分区：
文献类型：
--
作者：
M. Schumann;Anant V. Patel;M. Vemmer;S. Vidal
背景
西部玉米根虫幼虫利用二氧化碳来定位玉米根部。然而，二氧化碳作为靠近玉米根部的特定定向线索的重要性并没有得到明确的研究。这项研究旨在阐明二氧化碳排放胶囊与土壤杀虫剂(特氟氰菊酯=吸引和杀死)在根系中的联合作用。我们假设胶囊会导致幼虫聚集在土壤杀虫剂上，从而增加其药效。用非破坏性观察装置研究了幼虫的分布和行为。
结果
距离指数的空间分析(SADIE)显示，4h后，幼虫在吸引和杀死处理中聚集在胶囊周围，这是常规处理没有胶囊时所没有的。然而，不同处理的幼虫死亡率没有差异。
结论
CO2对西部玉米根虫幼虫在根系内的引诱力较弱。因此，与传统的特氟氰菊酯应用相比，基于二氧化碳产品的吸引和杀死策略不会有助于更好的控制。寄主特有的化合物，结合二氧化碳来源，应该针对更多的幼虫，使吸引和杀死该害虫成为一种可行的管理选择。
BACKGROUND
Western corn rootworm larvae use CO2 to locate maize roots. However, the importance of CO2 as a specific orientation cue close to maize roots has not been investigated unequivocally. This study aimed at elucidating the effect of CO2 -emitting capsules in combination with a soil insecticide (Tefluthrin = attract and kill) within the root system. We hypothesized that the capsules would result in aggregation of the larvae at the soil insecticide, thus increasing its efficacy. A nondestructive observation device was used to study larval distribution and behaviour.
RESULTS
Spatial analysis of distance indices (SADIE) revealed aggregation of the larvae around the capsules in an attract-and-kill treatment after 4 h, which was not found with the conventional treatment without the capsules. However, larval mortality did not differ between treatments.
CONCLUSION
CO2 is a weak attractant for western corn rootworm larvae within the root system. Consequently, an attract-and-kill strategy based on a CO2 product will not contribute to better control compared with conventional Tefluthrin applications. Host-specific compounds, combined with a CO2 source, should be used to target more larvae, making attract and kill a feasible management option against this pest.
影响因子：
4.7
作者：
Soderlund DM
通讯作者：
Soderlund DM