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首页> 外文期刊>Australian Forestry >Spatial distribution of a chrysomelid leaf beetle (Cadmus excrementarius Suffrian) and potential damage in a Eucalyptus globulus subsp. globulus plantation
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Spatial distribution of a chrysomelid leaf beetle (Cadmus excrementarius Suffrian) and potential damage in a Eucalyptus globulus subsp. globulus plantation

机译：葫芦科叶甲虫（Cadmus excrementarius Suffrian）的空间分布和桉树亚种的潜在危害。球状人工林

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摘要

The spatial distribution of the chrysomelid beetle Cadmus excrementarius and associated damage was studied in a 9-month-old bluegum plantation (Eucalyptus globulus subsp. globulus), growing at Rocky Gully in southwestern Australia. Adult beetles hada clumped distribution between trees, with beetle numbers being significantly positively correlated with tree size. Beetles were also aggregated within trees, with over 92% present in the upper crown. Defoliation in the upper crown was greater than forthe lower crown, and ranged from 0 to 50% of total upper crown foliage, averaging 6.3%. This damage was significantly correlated with tree size and number of beetles. Female beetles consumed significantly more foliage over 48 h (2.9+-0.4 cm2) than the smaller males (0.8+-0.1 cm2). A regression model exploring the relationship between beetle numbers and cumulative foliage consumption was developed. It predicts that 31 or more beetles could completely defoliate the upper crown within 3 months.
机译：在生长于澳大利亚西南部洛基沟谷的一个9个月大的蓝桉人工林（桉树球藻亚种球藻）中研究了金龟子甲虫排泄物的空间分布及相关损害。成年甲虫hada丛生分布在树木之间，甲虫数量与树木大小显着正相关。甲虫也聚集在树木中，上冠中有92％以上。上部树冠的落叶大于下部树冠的落叶，范围为上部树冠总叶子的0％至50％，平均为6.3％。这种损害与树木的大小和甲虫的数量显着相关。在48小时（2.9 + -0.4平方厘米）内，雌性甲虫比较小的雄性（0.8 + -0.1平方厘米）消耗更多的叶子。建立了一个探索甲虫数量和累积叶片消耗之间关系的回归模型。它预测31个或更多的甲虫可以在3个月内完全使上冠脱叶。

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