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昆虫病原真菌在自然环境中对害虫数量起着抑制作用,在害虫的微生物防治中也占有独特的地位。长期以来,在应用昆虫病原真菌防治人畜害虫方面研究进展较为缓慢,六十年代以来才有较大的发展。本文介绍了近十年的发展概况,并讨论了影响这个研究领域迅速发展的原因及病原真菌在生物防治中应用的潜力。认为尽管至今对这类真菌了解还较少,但通过今后加强有关方面的研究工作,其应用前景是广阔的。 相似文献
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基因工程改良在昆虫病原真菌中的应用 总被引:1,自引:0,他引:1
昆虫病原真菌是自然界控制害虫种群的主要生物因子,其研究开发越来越受到重视。但由于存在致死速度慢、防效不稳定、对环境条件要求高等缺点,限制了昆虫病原真菌的应用。近年来,通过基因工程技术对昆虫病原真菌进行遗传改造,提高菌株的致病性和毒力,创造高效、稳定的工程菌株取得了较大进展。对昆虫病原真菌选择标记、遗传转化方法、基因工程改良及应用等方面最新研究进展进行了综述。 相似文献
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昆虫病原真菌毒素对昆虫的作用机制研究进展 总被引:8,自引:0,他引:8
昆虫病原真菌是昆虫病原微生物中一个最大的类群 ,约有 75 0多种 ,寄主范围较广 ,可寄生 5个目2 4个科 2 0 0余种昆虫。 1 879年Metchnikoff用绿僵菌 (Metarhiziumanisopliae)防治奥国塞丽金龟 (Anisopliaaustriaca)获得成功 ,并且生产出大量用于生物防治的绿僵菌孢子产品[1] 。随后昆虫病原微生物用来防治害虫的研究与应用渐多 ,到目前为止已有 5 0多种真菌制剂在世界各国注册使用[2 ] 。毒素被认为是昆虫病原真菌对付昆虫的一种有效手段。Suzuki[3 ] 和Champlin[4 ] 分… 相似文献
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昆虫病原真菌是一类重要的害虫自然控制因子,但由于病原真菌对寄主昆虫的慢击倒性,使得病原真菌的应用受到极大的限制。八十年代,人们的研究目标集中在昆虫病原真菌的酶学研究上;到了九十年代则全面进入了分子生物学的研究阶段。包括昆虫病原真菌毒力基因在内的许多基因得到了研究,使得对病原真菌的人工定向改造成为可能。1 蛋白酶基因昆虫的体壁主要是由蛋白基质和分布其中的几丁质组成,是防止大多数微生物入侵的有效途径。蛋白质的类型和数量在不同种类的昆虫、组织和生长阶段中是不断变化的(Andersen,1974)。为了能穿透这样一… 相似文献
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柑橘木虱是柑橘黄龙病的重要传播虫媒。目前对柑橘黄龙病的防治尚缺有效的药剂和抗病品种,加强对柑橘木虱的防治,对控制柑橘黄龙病的蔓延具有重要意义。目前防治柑橘木虱多采用化学防治,杀虫剂的频繁使用造成了农药残留、环境污染、生物多样性被破坏和害虫产生抗药性等诸多问题,生物防治以其高效、低毒、低残留、不易产生抗药性等优点逐渐受到重视。昆虫病原真菌能侵入昆虫寄主体内,导致昆虫发病死亡,具有良好的病害流行潜力及生产应用便利性,利用昆虫病原真菌防治柑橘木虱具有广阔的发展空间。本文总结了用于柑橘木虱生物防治的虫生真菌种类,重点介绍了国内外利用球孢白僵菌、玫烟色棒束孢、淡紫紫孢菌、宛氏拟青霉、蜡蚧菌等虫生真菌在防治柑橘木虱中的应用,并对虫生真菌防治柑橘木虱的发展前景进行了展望,以期为柑橘黄龙病的防控提供借鉴。 相似文献
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水稻主要害虫的病原微生物考查 总被引:1,自引:0,他引:1
自1977年以来我们对稻田主要害虫疾病的病原种类及其优势种群进行了较为系统的普查工作。分离材料取自全省各地,包括害虫各个时期的不同虫态。寄主昆虫包括鳞翅目、同翅目、半翅目、直翅目及其它目的害虫。所分离的病原物有真菌、细菌、线虫等。对一些病原真菌和细菌的优势种还作了性状培养、生物检测及田间防治试验。现将结果简要报道如下。 相似文献
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The behavioural response of an insect to a fungal pathogen will have a direct effect on the efficacy of the fungus as a biological
control agent. In this paper we describe two processes that have a significant effect on the interactions between insects
and entomopathogenic fungi: (a) the ability of target insects to detect and avoid fungal pathogens and (b) the transmission
of fungal pathogens between host insects. The behavioural interactions between insects and entomopathogenic fungi are described
for a variety of fungal pathogens ranging from commercially available bio-pesticides to non-formulated naturally occurring
pathogens. The artificial manipulation of insect behaviour using dissemination devices to contaminate insects with entomopathogenic
fungi is then described. The implications of insect behaviour on the use of fungal pathogens as biological control agents
are discussed. 相似文献
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Włóka E 《Postepy biochemii》2011,57(1):115-121
Entomopathogenic fungi have a great potential in biological control of insect pest population. Fungal pathogens are promising source of insecticides and notable alterative to chemical pesticides. These fungi possess a unique mechanism of insects paralysis. As natural enemies of insects they attack direct host cuticle via a combination of mechanical pressure and cuticle-degrading enzymes. Entomopathogenic fungi produce several proteo-, chitino- and lipolytic enzymes, which are accepted as key factors in insect mycosis. The role of extracellular enzymes in pathogenesis is still not well understood. Profound understanding the mechanisms of insect paralysis by entomopathogenic fungi will help in the production of safer for environment and more efficiency mycoinsecticides. 相似文献
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Hemiberlesia pitysophila Takagi is an extremely harmful exotic insect in forest to Pinus species, including Pinus massoniana. Using both morphological taxonomy and molecular phylogenetics, we identified 15 strains of entomogenous fungi, which belong to 9 genera with high diversities. Surprisingly, we found that five strains that were classified as species of Pestalotiopsis, which has been considered plant pathogens and endophytes, were the dominant entomopathogenic fungus of H. pitysophila. Molecular phylogenetic tree established by analyzing sequences of ribosomal DNA internal transcribed spacer showed that entomopathogenic Pestalotiopsis spp. were similar to plant Pestalotiopsis, but not to other pathogens and endophytes of its host plant P. massoniana. We were the first to isolate entomopathogenic Pestalotiopsis spp. from H. pitysophila. Our findings suggest a potential and promising method of H. pitysophila bio-control. 相似文献
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Fernando E. Vega Mark S. Goettel Meredith Blackwell David Chandler Mark A. Jackson Siegfried Keller Masanori Koike Nguya K. Maniania Arnulfo Monzón Bonnie H. Ownley Judith K. Pell Drauzio E.N. Rangel Helen E. Roy 《Fungal Ecology》2009,2(4):149-159
An important mechanism for insect pest control should be the use of fungal entomopathogens. Even though these organisms have been studied for more than 100 y, their effective use in the field remains elusive. Recently, however, it has been discovered that many of these entomopathogenic fungi play additional roles in nature. They are endophytes, antagonists of plant pathogens, associates with the rhizosphere, and possibly even plant growth promoting agents. These findings indicate that the ecological role of these fungi in the environment is not fully understood and limits our ability to employ them successfully for pest management. In this paper, we review the recently discovered roles played by many entomopathogenic fungi and propose new research strategies focused on alternate uses for these fungi. It seems likely that these agents can be used in multiple roles in protecting plants from pests and diseases and at the same time promoting plant growth. 相似文献
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We report here that, during periodical surveys of insects inhabiting diverse habitats for the collection of entomopathogenic
fungi; a large number of isolates were recovered belonging to seven species, from various regions of Madhya Pradesh and Chhattisgarh
forest areas and agricultural fields. The most common entomopathogenic fungi such as Beauveria bassiana, Nomuraea rileyi, Paecilomyces farinosus and Paecilomyces fumosoroseus were found to infect various insect hosts species naturally viz. Hyblaea puera, Eutectona machaeralis, Diachrysia orichalcea, Spodoptera litura, and few new insect hosts of these fungal pathogens among Indian insect population were collected for the first time from
Central India, such as beetles of Agrilus species, hairy caterpillars of Lymantria species. The isolation, identification, maintenance and pathogenicity assay of these isolates was performed prior to deposition
in culture collection center. 相似文献
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《Fungal Biology Reviews》2020,34(1):41-57
The genus Fusarium is noted for including important plant pathogens and mycotoxin producers. Furthermore, many Fusarium lineages have been reported to be efficient in controlling insects and to exhibit promising characteristics for agricultural pest control such as causing high mortality rates and having fast action and abundant sporulation. In this review we present a survey of peer-reviewed papers published from 2000 to 2019, demonstrating the widespread pathogenicity of Fusarium to insects. This survey was made using search strings in a number of databases. We list the major complexes and species of Fusarium reported as entomopathogenic and highlight the features of interest for insect control as well as the advantages and implications of this practice. Out of a total of forty papers, at least 30 species and 273 isolates of Fusarium were reported as pathogenic to at least one species of insect. Ten complexes of Fusarium species harbor entomopathogenic fungi, of which F. incarnatum-equiseti, F. fujikuroi, F. oxysporum and F. solani (= Neocosmospora solani) species complexes represented the most abundant number of entomopathogenic strains. The entomopathogenic interactions of these fungi have received greater attention in recent years, but much remains to be explored, especially regarding the specificity of these fungi for the host insect, the production of undesirable secondary metabolites, and side-effect and safety tests organisms not targets. Detailed investigations in this regard will be crucial if we are to fully exploit the potential of Fusarium for controlling insect pests. 相似文献
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虫生真菌研究与应用的发展与机遇
——2012年虫生真菌专刊序言 总被引:1,自引:0,他引:1
我国从事虫生真菌基础及应用研究的人员众多,各方面均取得了重要的研究成果。2012年“虫生真菌专刊”收集了国内关于虫生真菌资源、基因克隆及活性成分代谢等方面的最新研究进展。进一步的基础研究,应加强致病基因功能和真菌-昆虫分子相互作用等研究,以提高真菌杀虫剂或药用虫生真菌的应用效率。 相似文献
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Christopher A. Dunlap José Luis Ramirez Gabriel Moura Mascarin David P. Labeda 《Antonie van Leeuwenhoek》2018,111(6):897-904
We report the development of a publicly accessible, curated nucleotide sequence database of hypocrealean entomopathogenic fungi. The goal is to provide a platform for users to easily access sequence data from taxonomic reference strains. The database can be used to accurately identify unknown entomopathogenic fungi based on sequence data for a variety of phylogenetically informative loci. The database provides full multi-locus sequence alignment capabilities. The initial release contains data compiled for 525 strains covering the phylogenetic diversity of three important entomopathogenic families: Clavicipitaceae, Cordycipitaceae, and Ophiocordycipitaceae. Furthermore, Entomopathogen ID can be expanded to other fungal clades of insect pathogens, as sequence data becomes available. The database will allow isolate characterisation and evolutionary analyses. We contend that this freely available, web-accessible database will facilitate the broader community to accurately identify fungal entomopathogens, which will allow users to communicate research results more effectively. 相似文献