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首页> 外文期刊>Biocontrol Science and Technology >Impact in quarantine of the galling weevil Lepidapion argentatum on shoot growth of French broom (Genista monspessulana), an invasive weed in the western U.S.
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Impact in quarantine of the galling weevil Lepidapion argentatum on shoot growth of French broom (Genista monspessulana), an invasive weed in the western U.S.

机译：在法国扫帚（Genista Monspessulana）的射击生长中，陷入韦韦维尔鳞片属植物检疫（Genista Monspessulana）的影响，是美国西部的侵入杂草

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摘要

In weed biocontrol, there is a need for pre-release efficacy assessments for potential agents. Genista monspessulana ((L.) L.?A.?S. Johnson (Fabaceae), French broom) is an invasive perennial shrub in the western U.S. The galling weevil Lepidapion argentatum Gerstaecker is a potential biocontrol agent. The impact of increasing weevil density on galling damage, plant height, width, leaf damage, and relative growth rate (RGR) was assessed in greenhouse experiments on two to three-month-old seedlings infested with either one or three weevils. Infestation by three female weevils caused 48% more galls producing 27% more larvae than did infestation with one female while causing only 1% leaf damage and no difference in total leaf area. Infestation with multiple weevils caused a 55% and 29% decrease in plant height and canopy width respectively, while single-weevil infestation decreased height by 32% and width to the same degree as for multiple weevils. The RGR of seedlings infested with three weevils was three times slower than the controls, while growth was reduced 2-fold by single-weevil infestation. Reductions in plant size and growth rate induced by weevil galling could reduce plant competitive survival to reproduction and also plant population dispersal as seedlings. Our results suggest that L.?argentatum has the potential to cause impact to French broom seedlings if released in the invasive range.
机译：在杂草生物控制中，需要对潜在剂进行预释放的疗效评估。 Genista Monspessulana（（L.）L.?A.?S。Johnson（Fabaceae），法国扫帚）是美国西部的侵入性常年灌木。陷入困境的象鼻虫羊皮氏菌属于潜在的生物控制剂。在温室实验中，在两到三个月大的幼苗中，评估了增加象鼻虫密度对血液损伤，植物高，宽度，叶片损伤和相对生长速率（RGR）的影响。三位女性象鼻虫的侵染引起了48％的血液产生27％的幼虫，而不是一个女性的侵扰，同时只引起1％的叶片损伤，总叶面积没有差异。具有多个象鼻虫的侵扰，分别引起55％和29％的植物高度和冠层宽度，而单象侵蚀的侵袭会降低32％和宽度与多个象鼻虫相同。用三个象鼻液感染的幼苗RGR比对照速度慢三倍，而单象侵蚀则生长减少了2倍。象鼻虫吞咽诱导的植物大小和生长速率降低可以降低植物竞争生存到繁殖，也可以将人口分散作为苗木。我们的结果表明，如果在侵入范围内释放，L.?Argentatum可能会对法式扫帚幼苗产生影响。

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