Testing Virulence of Different Species of Insect Associated Fungi against Yellow Mealworm (Coleoptera: Tenebrionidae) and Their Potential Growth Stimulation to Maize

This paper investigates 71 isolates of two genera of entomopathogens, <i>Metarhizium</i> and <i>Beauveria</i>, and a biostimulative genus <i>Trichoderma</i>, for their ability to infect yellow mealworms (<i>Tenebrio molitor</i>) and to stimulate maize...

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Autores principales: Eva Praprotnik, Jernej Lončar, Jaka Razinger
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Publicado: MDPI AG 2021
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spelling oai:doaj.org-article:20b60b6d082d428094b36015a0cb11ca2021-11-25T18:47:04ZTesting Virulence of Different Species of Insect Associated Fungi against Yellow Mealworm (Coleoptera: Tenebrionidae) and Their Potential Growth Stimulation to Maize10.3390/plants101124982223-7747https://doaj.org/article/20b60b6d082d428094b36015a0cb11ca2021-11-01T00:00:00Zhttps://www.mdpi.com/2223-7747/10/11/2498https://doaj.org/toc/2223-7747This paper investigates 71 isolates of two genera of entomopathogens, <i>Metarhizium</i> and <i>Beauveria</i>, and a biostimulative genus <i>Trichoderma</i>, for their ability to infect yellow mealworms (<i>Tenebrio molitor</i>) and to stimulate maize (<i>Zea mays</i>) growth. Fungal origin, host, and isolation methods were taken into account in virulence analysis as well. Isolates <i>Metarhizium brunneum</i> (1154) and <i>Beauveria bassiana</i> (2121) showed the highest mortality (100%) against <i>T. molitor</i>. High virulence seems to be associated with fungi isolated from wild adult mycosed insects, meadow habitats, and Lepidopteran hosts, but due to uneven sample distribution, we cannot draw firm conclusions. <i>Trichoderma atroviride</i> (2882) and <i>Trichoderma gamsii</i> (2883) increased shoot length, three <i>Metarhizium robertsii</i> isolates (2691, 2693, and 2688) increased root length and two <i>M. robertsii</i> isolates (2146 and 2794) increased plant dry weight. Considering both criteria, the isolate <i>M. robertsii</i> (2693) was the best as it caused the death of 73% <i>T. molitor</i> larvae and also significantly increased maize root length by 24.4%. The results warrant further studies with this isolate in a tri-trophic system.Eva PraprotnikJernej LončarJaka RazingerMDPI AGarticleentomopathogenic fungi<i>Tenebrio molitor</i>virulencepathogenicitygrowth stimulationplant–microbe–pest interactionsBotanyQK1-989ENPlants, Vol 10, Iss 2498, p 2498 (2021)
institution DOAJ
collection DOAJ
language EN
topic entomopathogenic fungi
<i>Tenebrio molitor</i>
virulence
pathogenicity
growth stimulation
plant–microbe–pest interactions
Botany
QK1-989
spellingShingle entomopathogenic fungi
<i>Tenebrio molitor</i>
virulence
pathogenicity
growth stimulation
plant–microbe–pest interactions
Botany
QK1-989
Eva Praprotnik
Jernej Lončar
Jaka Razinger
Testing Virulence of Different Species of Insect Associated Fungi against Yellow Mealworm (Coleoptera: Tenebrionidae) and Their Potential Growth Stimulation to Maize
description This paper investigates 71 isolates of two genera of entomopathogens, <i>Metarhizium</i> and <i>Beauveria</i>, and a biostimulative genus <i>Trichoderma</i>, for their ability to infect yellow mealworms (<i>Tenebrio molitor</i>) and to stimulate maize (<i>Zea mays</i>) growth. Fungal origin, host, and isolation methods were taken into account in virulence analysis as well. Isolates <i>Metarhizium brunneum</i> (1154) and <i>Beauveria bassiana</i> (2121) showed the highest mortality (100%) against <i>T. molitor</i>. High virulence seems to be associated with fungi isolated from wild adult mycosed insects, meadow habitats, and Lepidopteran hosts, but due to uneven sample distribution, we cannot draw firm conclusions. <i>Trichoderma atroviride</i> (2882) and <i>Trichoderma gamsii</i> (2883) increased shoot length, three <i>Metarhizium robertsii</i> isolates (2691, 2693, and 2688) increased root length and two <i>M. robertsii</i> isolates (2146 and 2794) increased plant dry weight. Considering both criteria, the isolate <i>M. robertsii</i> (2693) was the best as it caused the death of 73% <i>T. molitor</i> larvae and also significantly increased maize root length by 24.4%. The results warrant further studies with this isolate in a tri-trophic system.
format article
author Eva Praprotnik
Jernej Lončar
Jaka Razinger
author_facet Eva Praprotnik
Jernej Lončar
Jaka Razinger
author_sort Eva Praprotnik
title Testing Virulence of Different Species of Insect Associated Fungi against Yellow Mealworm (Coleoptera: Tenebrionidae) and Their Potential Growth Stimulation to Maize
title_short Testing Virulence of Different Species of Insect Associated Fungi against Yellow Mealworm (Coleoptera: Tenebrionidae) and Their Potential Growth Stimulation to Maize
title_full Testing Virulence of Different Species of Insect Associated Fungi against Yellow Mealworm (Coleoptera: Tenebrionidae) and Their Potential Growth Stimulation to Maize
title_fullStr Testing Virulence of Different Species of Insect Associated Fungi against Yellow Mealworm (Coleoptera: Tenebrionidae) and Their Potential Growth Stimulation to Maize
title_full_unstemmed Testing Virulence of Different Species of Insect Associated Fungi against Yellow Mealworm (Coleoptera: Tenebrionidae) and Their Potential Growth Stimulation to Maize
title_sort testing virulence of different species of insect associated fungi against yellow mealworm (coleoptera: tenebrionidae) and their potential growth stimulation to maize
publisher MDPI AG
publishDate 2021
url https://doaj.org/article/20b60b6d082d428094b36015a0cb11ca
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AT jernejloncar testingvirulenceofdifferentspeciesofinsectassociatedfungiagainstyellowmealwormcoleopteratenebrionidaeandtheirpotentialgrowthstimulationtomaize
AT jakarazinger testingvirulenceofdifferentspeciesofinsectassociatedfungiagainstyellowmealwormcoleopteratenebrionidaeandtheirpotentialgrowthstimulationtomaize
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