Weaver Mark A, Abbas Hamed K, Jin Xixuan, Elliott Brad
a USDA ARS, Biological Control of Pests Research Unit , National Biological Control Laboratory , Stoneville , MS , USA.
Food Addit Contam Part A Chem Anal Control Expo Risk Assess. 2016;33(2):346-51. doi: 10.1080/19440049.2015.1129071. Epub 2016 Jan 8.
Field experiments were conducted in 2011 and 2012 to evaluate the efficacy of water-dispersible granule (WDG) formulations of biocontrol strains of Aspergillus flavus in controlling aflatoxin contamination of corn. In 2011, when aflatoxin was present at very high levels, there was no WDG treatment that could provide significant protection against aflatoxin contamination. The following year a new WDG formulation was tested that resulted in 100% reduction in aflatoxin in one field experiment and ≥ 49% reduction in all five WDG treatments with biocontrol strain 21882. Large sampling error, however, limited the resolution of various treatment effects. Corn samples were also subjected to microbial analysis to understand better the mechanisms of successful biocontrol. In the samples examined here, the size of the A. flavus population on the grain was associated with the amount of aflatoxin, but the toxigenic status of that population was a poor predictor of aflatoxin concentration.
2011年和2012年开展了田间试验，以评估黄曲霉生物防治菌株的水分散粒剂（WDG）制剂在控制玉米黄曲霉毒素污染方面的效果。2011年，当黄曲霉毒素含量非常高时，没有哪种WDG处理能够对黄曲霉毒素污染提供显著保护。次年，对一种新的WDG制剂进行了测试，在一项田间试验中该制剂使黄曲霉毒素减少了100%，并且在使用生物防治菌株21882的所有五种WDG处理中，黄曲霉毒素减少了≥49%。然而，较大的抽样误差限制了各种处理效果的分辨率。还对玉米样品进行了微生物分析，以更好地了解成功进行生物防治的机制。在此处检测的样品中，谷物上黄曲霉菌落的大小与黄曲霉毒素的含量相关，但该菌落的产毒状态并不能很好地预测黄曲霉毒素的浓度。
