The effects of insect pathogenic soil fungi and ectomycorrhizal inoculation of birch seedlings on the survival of Otiorhynchus larvae
The effects of insect pathogenic soil fungi and ectomycorrhizal inoculation of birch seedlings on the survival of Otiorhynchus larvae
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DOI：
10.1111/j.1461-9563.2010.00482.x
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发表时间：
2010-08
影响因子：
1.6
通讯作者：
E. Oddsdóttir;J. Eilenberg;R. Sen;G. Halldórsson
中科院分区：
文献类型：
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作者：
E. Oddsdóttir;J. Eilenberg;R. Sen;G. Halldórsson
1象鼻虫属的象鼻虫幼虫在农业和林业中是一个严重的问题，主要通过幼虫取食根部对广泛的植物物种造成损害。Oakhynchus幼虫是冰岛森林种植园中的一种严重害虫，导致10-20%的新种植幼苗死亡。2.研究了土壤真菌对沟爪螨幼虫存活的影响。将幼虫引入具有生长在以下中的桦树幼苗的盆中：（i）苗圃泥炭;（ii）用三种不同种类的外生菌根真菌接种的苗圃泥炭;（iii）用昆虫病原真菌接种的苗圃泥炭;（iv）用外生菌根真菌和昆虫病原真菌接种的苗圃泥炭;以及（v）用来自冰岛桦树林地的天然森林土壤接种的苗圃泥炭。3幼虫的存活受到以下接种的负面影响：（i）外生菌根真菌Laccaria laccata;（ii）外生菌根真菌Cenococcum geophylum;（iii）昆虫病原真菌绿僵菌;（iv）森林土壤。接种外生菌根真菌Phialophora finlandia没有任何显着影响幼虫的存活。昆虫病原菌与外生菌根真菌之间没有明显的协同作用。4.外生菌根真菌和昆虫病原真菌在冰岛造林区对奥陶洛斯线虫幼虫的生物防治中具有显著的潜力。需要进一步的研究来确定这些真菌在田间的影响，并分析菌根真菌如何影响根食幼虫。
1 Weevil larvae of the genus Otiorhynchus are a serious problem in agriculture and forestry, causing damage to a wide range of plant species, primarily by larval feeding on roots. Otiorhynchus larvae are a serious pest in forest plantations in Iceland, causing 10–20% mortality of newly‐planted seedlings. 2 We studied the effects of soil fungi on the survival of Otiorhynchus sulcatus larvae. The larvae were introduced into pots with birch seedlings grown in: (i) nursery peat; (ii) nursery peat inoculated with three different species of ectomycorrhizal fungi; (iii) nursery peat inoculated with insect pathogenic fungi; (iv) nursery peat inoculated with ectomycorrhizal fungi and insect pathogenic fungi; and (v) nursery peat inoculated with natural forest soil from Icelandic birch woodland. 3 Larval survival was negatively affected by inoculation of: (i) the ectomycorrhizal fungus Laccaria laccata; (ii) the ectomycorrhizal fungus Cenococcum geophylum; (iii) the insect pathogenic fungus Metarhizium anisopliae; and (iv) forest soil. Inoculation with the ectomycorrhizal fungus Phialophora finlandia did not have any significant effect on larval survival. No significant synergistic effect was found between insect pathogenic and ectomycorrhizal fungi. 4 It is concluded that ectomycorrhizal and insect pathogenic fungi have a significant potential in biological control of Otiorhynchus larvae in afforestation areas in Iceland. Further studies are needed to establish the effect of these fungi in the field and to analyse how mycorrhizal fungi affect root‐feeding larvae.