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首页> 外文期刊>Biocontrol Science and Technology >An entomopathogenic fungus and nematode prove ineffective for biocontrol of an invasive leaf miner Profenusa thomsoni in Alaska
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An entomopathogenic fungus and nematode prove ineffective for biocontrol of an invasive leaf miner Profenusa thomsoni in Alaska

机译：昆虫病原真菌和线虫被证明无法有效控制阿拉斯加一家入侵性矿工Profenusa thomsoni

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摘要

A non-native invasive sawfly, the amber-marked birch leaf miner Profenusa thomsoni (Konow), was first detected in south-central Alaska in 1996 and is now widely distributed throughout urban and wild birch trees in Alaska. Impacts have been considered primarily aesthetic because leaf miners cause leaves of birch trees (Betula spp.) to senesce prematurely, but the leaf miners likely also reduce birch vigour and thereby increase susceptibility to diseases and other insects. We tested the ability of commercially available biological control agents to control P. thomsoni. The entomopathogenic fungus Beauveria bassiana (Bals.-Criv.) Vuillemin GHA strain and the entomopathogenic nematode Steinernema carpocapsae (Weiser) were applied in aqueous suspension to the soil/litter surface beneath infested birch trees in Alaska at one site in 2007 and 2008 and two sites in 2010. There was no evidence the fungus or nematode controlled P. thomsoni. Instead, there was evidence the fungus increased the density of this pest insect at two sites, likely by reducing its predators. As tested, B. bassiana and S. carpocapsae do not appear effective as biological controls of P. thomsoni.
机译：1996年在阿拉斯加中南部首次发现了一种非本地侵入性锯齿虫，带有琥珀色标记的桦树叶采伐者Profenusa thomsoni（科诺），如今已广泛分布于阿拉斯加的城市和野生桦树中。人们认为影响主要是美学上的，因为采叶者会引起桦树叶子（Betula spp。）过早衰老，但是采叶者可能还会降低桦树的活力，从而增加对疾病和其他昆虫的易感性。我们测试了可商购的生物防治剂控制炭疽杆菌的能力。昆虫致病性球孢白僵菌（Balveria bassiana）（Bal.-Criv。）Vuillemin GHA菌株和昆虫致病性线虫Steinernema carpocapsae（Weiser）以水悬液的形式分别施用于阿拉斯加受侵染的白桦树下的土壤/凋落物表面，分别于2007年和2008年施用于两个地点地点在2010年。没有证据表明真菌或线虫能控制thomsoni。取而代之的是，有证据表明，真菌可能通过减少其捕食者而在两个部位增加了该害虫的密度。经测试，球孢杆菌和炭疽杆菌似乎不能有效地作为雷索氏菌的生物学对照。

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