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首页> 美国卫生研究院文献>Scientific Reports >Monitoring of the field application of Metarhizium anisopliae in Brazil revealed high molecular diversity of Metarhizium spp in insects soil and sugarcane roots
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Monitoring of the field application of Metarhizium anisopliae in Brazil revealed high molecular diversity of Metarhizium spp in insects soil and sugarcane roots

机译：监测巴西Metanhizium sisopliae的田间应用后发现Medirhizium spp在昆虫土壤和甘蔗根中具有较高的分子多样性

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The use of Metarhizium against sugarcane spittlebugs in Brazil is one of the most successful and long lasting biological control programs using entomopathogenic fungus in the world. However, studies to monitor the fate of this fungus on the sugarcane agroecosystem are rare, especially with respect to its persistence, efficacy in pest control and impact on the local populations of Metarhizium. The present study aimed at documenting the efficacy and persistence of M. anisopliae strain ESALQ1604 in a sugarcane field by using microsatellite molecular markers. The species diversity of Metarhizium was characterized in insects, soil and sugarcane roots in a sprayed and an unsprayed plot. Although the infection rates were not very high (≤ 50%), the applied strain was recovered from spittlebugs after 7, 30 and 60 days’ post-application, but accounted for only 50%, 50% and 70.5% of all insects killed by M. anisopliae, respectively. All haplotypes from spittlebug were associated with a single subclade of M. anisopliae. The highest haplotype diversity was found in soil (h = 0.989) and in the smallest in spittlebug (h = 0.779). Metarhizium robertsii, M. anisopliae, M. brunneum; one taxonomically unassigned lineage was found in soil and only M. brunneum and M. anisopliae were isolated from roots. This study revealed the great diversity of Metarhizium spp. in the sugarcane agroecosystem and the importance of the local population of M. anisopliae on spittlebugs management.
机译：在巴西，使用Metrahizium防治甘蔗的臭虫是世界上使用致病性真菌的最成功，最持久的生物防治计划之一。然而，很少有研究来监测这种真菌在甘蔗农业生态系统上的命运，特别是在其持久性，控制害虫的功效以及对Metarhizium本地种群的影响方面。本研究的目的是通过使用微卫星分子标记，记录蔗糖分枝杆菌菌株ESALQ1604在甘蔗田中的功效和持久性。在喷洒和未喷洒的地块中，昆虫，土壤和甘蔗的根部都可以反映出金属根的物种多样性。尽管感染率不是很高（≤50％），但在施药后7、30和60天后，从毒bug中回收了所应用的菌株，但仅占被杀灭的所有昆虫的50％，50％和70.5％。分别为M. anisopliae。臭虫的所有单倍型都与单个分枝杆菌分枝相关。在土壤中，单倍型多样性最高（h = 0.989），在瓢虫中最小（h = 0.779）。罗伯茨氏菌，anisopliae，M。brunneum；在土壤中发现了一个分类学上未分配的谱系，仅从根部分离出了布鲁氏杆菌和无分枝杆菌。这项研究揭示了Metrahizium spp的多样性。在甘蔗农业生态系统中的分布以及当地沙棘分枝杆菌对口虫管理的重要性。

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