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首页> 外文期刊>Forestry >Sirex woodwasp range expansion in Australia: performance and parasitism on two commercial pine species
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Sirex woodwasp range expansion in Australia: performance and parasitism on two commercial pine species

机译：Sirex Woodwasp在澳大利亚的范围扩大：对两种商业松树树的表现和寄生

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Sirex woodwasp was detected in Queensland in 2009 and rapidly established in softwood plantations (Pinus radiata and P. taeda) in southern border regions. Biocontrol inoculations of Deladenus siricidicola began soon after, and adults were monitored to assess the success of the programme. Wasp size, sex ratios, emergence phenology and nematode parasitism rates were recorded, along with the assessment of wild-caught females. Patterns varied within and among seasons, but overall, P. taeda appeared to be a Less suitable hostthan P. radiata, producing smaller adults, Lower fat body content and fewer females. Sirex emerging from P. taeda also showed Lower Levels of nematode parasitism, possibly due to interactions with the more abundant blue-stain fungus in this host. Sirex adults generally emerged between November and March, with distinct peaks in January and March, separated by a marked drop in emergence in early February. Temperature provided the best correlate of seasonal emergence, with fortnights with higher mean minimum temperatures having higher numbers of Sirex emerging. This has implications for the anticipated northward spread of Sirex into sub-tropical coastal plantation regions. Following four seasons of inundative release of nematodes in Queensland, parasitism rates remain Low and have resulted in only partial sterilization of infected females.
机译：2009年在昆士兰州发现了Sirex木蜂，并在南部边境地区的针叶木人工林（Pinus radiata和P. taeda）中迅速建立了它们。此后不久开始对Deladenus siricidicola进行生物防治接种，并监测了成年人以评估该计划的成功。记录黄蜂的大小，性别比，出苗物候和线虫寄生率，以及对野外捕获雌性的评估。季节内和季节之间的模式各不相同，但总的来说，taeda斑节对虾似乎不如radiata斑节对虾更合适，其成虫变小，脂肪含量降低，雌性变少。来自taeda的Sirex也显示出较低水平的线虫寄生性，可能是由于与该寄主中更丰富的蓝染色真菌相互作用所致。 Sirex成虫一般在11月至3月之间出现，在1月和3月出现明显高峰，在2月初出现显着下降。温度提供了季节性出现的最佳相关性，平均最低温度越高的两周，西里克斯出现的次数越多。这对Sirex有望向北扩散到亚热带沿海人工林地区具有影响。在昆士兰州四个月线虫的大量释放之后，寄生率仍然很低，导致感染的雌性仅部分绝育。

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