Asian corn borer (ACB) and non-ACB pests in GM corn (Zea mays L.) inthe Philippines
Asian corn borer (ACB) and non-ACB pests in GM corn (Zea mays L.) inthe Philippines
复制标题
DOI：
10.1002/ps.3471
复制
发表时间：
2013-07-01
影响因子：
4.1
通讯作者：
de Snoo, Geert R.
中科院分区：
文献类型：
--
作者：
Afidchao, Miladis M.;Musters, C. J. M.;de Snoo, Geert R.
亚洲玉米螟（Ostrinia furnacalis, Guenee）已成为东南亚玉米危害最大的害虫。在过去的几十年里，菲律宾的玉米农民由于ACB的侵袭而遭受了巨大的产量损失。苏云金芽孢杆菌（Bt）和抗Bt除草剂（BtHT）玉米已被开发用于减少世界范围内的螟虫侵害。本研究评估了菲律宾伊莎贝拉省转基因玉米和非转基因玉米中ACB和非ACB害虫的侵染程度。具体目的是重新研究Bt玉米控制ACB的效果，评估Bt玉米植株对ACB敏感的部分，监测ACB抗性的潜在发展，以及评估在无ACB的Bt玉米环境中次生害虫是否占主导地位。这项研究包括与农民的预备访谈、选址、实地考察以及对198块玉米田200米样条线上的200株植物的目视检查。结果Bt玉米能有效减少ACB害虫，降低螟虫危害44%，Bt玉米和BtHT玉米的危害水平分别为6.8%和7%。Bt玉米叶片对ACB易感，而穗轴对ACB的影响较小。非ACB害虫在Bt无毒玉米地常见，在ACB含量丰富的非转基因玉米地较少。无acb的Bt玉米田未发现次生虫害暴发。结论含Cry1Ab蛋白的Bt和BtHT玉米杂种在伊莎贝拉省表现良好。减少ACB对Bt田的穗轴损害意味着即使有ACB侵染，经济损失也较小。在Bt和BtHT玉米田中，ACB的发生虽然是中等和不显著的水平，但可能意味着对Bt毒素产生抗性的潜在发展。(c) 2012年化学工业学会
Background The Asian corn borer (ACB), Ostrinia furnacalis (Guenee), has become the most damaging pest in corn in south-east Asia. Corn farmers in the Philippines have incurred great yield losses in the past decades because of ACB infestation. Bacillus thuringiensis (Bt) and Bt herbicide-tolerant (BtHT) corns have been developed to reduce borer attacks worldwide. This study assessed the extent of ACB and non-ACB pest infestations in both GM and non-GM corn in Isabela Province, the Philippines. Specific aims were to reinvestigate the efficacy of Bt corn in controlling ACB, to evaluate what parts of Bt corn plants are susceptible to ACB, to monitor the potential development of ACB resistance and to evaluate whether secondary pests dominate in an ACB-free Bt corn environment. The study involved preparatory interviews with farmers, site selection, field scouting and visual inspection of 200 plants along 200 m transect lines through 198 cornfields. Results Bt corn can efficiently reduce the ACB pest problem and reduce borer damage by 44%, to damage levels in Bt and BtHT corn of 6.8 and 7% respectively. The leaves of Bt corn were more susceptible, while cobs of Bt corn were less affected by ACB. Non-ACB pests were common in Bt toxin-free cornfields and reduced in non-GM cornfields where ACB was abundant. No secondary pest outbreaks were found in ACB-free Bt cornfields. Conclusion Bt and BtHT corn hybrids containing the Cry1Ab protein performed well in Isabela Province. Reduced cob damage by ACB on Bt fields could mean smaller economic losses even with ACB infestation. The occurrence of ACB in Bt and BtHT cornfields, although at a moderate and insignificant level, could imply the potential development of resistance to Bt toxin. (c) 2012 Society of Chemical Industry