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Current quarantine and suspension distances are excessive for incipient populations of Queensland fruit fly (Bactrocera tryoni (Froggatt)) (Diptera: Tephritidae) in southern New South Wales, Australia
Crop Protection ( IF 2.8 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.cropro.2020.105341
Bernard C. Dominiak , Benjamin G. Fanson

Abstract The Queensland fruit fly (Qfly; Bactrocera tryoni Froggatt) is a major horticultural pest species in Australia and considered a serious quarantine concern, both domestically and internationally. When a Qfly outbreak is declared in the main horticultural regions of southeast Australia, a 15 km radius suspension zone is established (area of 707 km2) around the epicentre of the outbreak. This suspension radius was originally adopted in the early 1990s. Here, we analysed trapping data in New South Wales (Australia) from 2002 to 2010 to evaluate the suitability of the 15 km suspension radius. There were 439 Qfly incursions recorded in Qfly-free zones, but only 9.9% of these incursions resulted in a declared outbreak. For these outbreaks, we conducted two distinct analyses. First, we modelled the distribution of infestation radii from the outbreaks and predicted the suspension distance using multiple levels of risk protection (e.g. probit 8.7, probit 9). Second, we fitted various probability distributions to individual fly trapping data and then estimated upper confidence limits for suspension distances, based on dispersal patterns of Qfly. Overall, the predicted suspension radii were substantially smaller than the current 15 km radius. Our results concur with other studies suggesting that Qfly are relatively poor colonisers. We propose that the current 15 km could be reduced substantially to 3 or 4 km.

中文翻译:

对于澳大利亚新南威尔士州南部的昆士兰果蝇(Bactrocera tryoni (Froggatt))(双翅目:实蝇科)的初期种群,目前的检疫和悬浮距离过大

摘要 昆士兰果蝇(Qfly;Bactrocera tryoni Froggatt)是澳大利亚的主要园艺害虫物种,在国内和国际上都被认为是一个严重的检疫问题。当澳大利亚东南部的主要园艺区宣布 Qfly 爆发时,会在爆发中心周围建立半径 15 公里的悬浮区(面积 707 平方公里)。这种悬挂半径最初是在 1990 年代初期采用的。在这里,我们分析了 2002 年至 2010 年新南威尔士州(澳大利亚)的诱捕数据,以评估 15 公里悬挂半径的适用性。在 Qfly 无区记录了 439 次 Qfly 入侵,但这些入侵中只有 9.9% 导致宣布爆发。对于这些爆发,我们进行了两种不同的分析。第一的,我们对爆发的侵染半径分布进行建模,并使用多级风险保护(例如概率 8.7、概率 9)预测暂停距离。其次,我们将各种概率分布拟合到单个苍蝇捕获数据,然后根据 Qfly 的分散模式估计悬浮距离的置信上限。总体而言,预测的悬挂半径远小于目前的 15 公里半径。我们的结果与其他研究一致,表明 Qfly 是相对较差的殖民者。我们建议将目前的 15 公里大幅缩减至 3 或 4 公里。我们将各种概率分布拟合到单个苍蝇捕获数据,然后根据 Qfly 的分散模式估计悬浮距离的置信上限。总体而言,预测的悬挂半径远小于目前的 15 公里半径。我们的结果与其他研究一致,表明 Qfly 是相对较差的殖民者。我们建议将目前的 15 公里大幅缩减至 3 或 4 公里。我们将各种概率分布拟合到单个苍蝇捕获数据,然后根据 Qfly 的分散模式估计悬浮距离的置信上限。总体而言,预测的悬挂半径远小于目前的 15 公里半径。我们的结果与其他研究一致,表明 Qfly 是相对较差的殖民者。我们建议将目前的 15 公里大幅缩减至 3 或 4 公里。
更新日期:2020-12-01
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