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302 results for “entomopathogen”
Figure 2 from: Bustamante DE, Oliva M, Leiva S, Mendoza JE, Bobadilla L, Angulo G, Calderon MS (2019) Phylogeny and species delimitations in the entomopathogenic genus Beauveria (Hypocreales, Ascomycota), including the description of B. peruviensis sp. nov. MycoKeys 58: 47-68. https://doi.org/10.3897/mycokeys.58.35764
Figure 2 Phylogenetic tree based on maximum likelihood inference of combined Bloc, RPB1, Tef1 data. Value above branches = Maximum likelihood bootstrap values (BS) / Bayesian posterior probabilities. Grey bars represent species delimitation results from ABGD-, SPN-, GMYC- and BPP based algorithmic methods based on Bloc, RPB1, and Tef1 sequences. Scale bar indicates the number of nucleotide substitution per site. a: delimited as the same species. B. araneola, B. gryllotalpidicola, B. loeiensis, B. medogensis, and B. rudraprayagi were not delimited by any DNA-based algorithm due to abundant missing data in their sequences.
Figure 1 from: Bustamante DE, Oliva M, Leiva S, Mendoza JE, Bobadilla L, Angulo G, Calderon MS (2019) Phylogeny and species delimitations in the entomopathogenic genus Beauveria (Hypocreales, Ascomycota), including the description of B. peruviensis sp. nov. MycoKeys 58: 47-68. https://doi.org/10.3897/mycokeys.58.35764
Figure 1 Collections of the 55 strains of B. amazonensis sp. nov. from the Rodriguez de Mendoza Province.
Figure 3 from: Bustamante DE, Oliva M, Leiva S, Mendoza JE, Bobadilla L, Angulo G, Calderon MS (2019) Phylogeny and species delimitations in the entomopathogenic genus Beauveria (Hypocreales, Ascomycota), including the description of B. peruviensis sp. nov. MycoKeys 58: 47-68. https://doi.org/10.3897/mycokeys.58.35764
Figure 3 Morphology of Beauveria amazonensis. A, B Colony growth on PDA showing the habit C–F conidiogenous cells and conidia.
Figure 4 in Positioning entomopathogenic nematodes for the future viticulture: exploring their use against biotic threats and as bioindicators of soil health
Figure 4. Evaluation of the impact of cover crops (CC) in the entomopathogenic nematode (EPN) soil food web in a Spanish vineyard. A. Impact in the presence and activity of native EPNs. B. Presence of natural enemies (nematophagous fungi and ectoparasitic bacteria) and competitors for the resource (Free-living nematodes) (Data from Blanco-Pérez et al., 2020, modified for this figure).
Figure 3. Preventive inhibition growth effect against Botrytis cinerea over grapevine leaves three days after the infection. A in Positioning entomopathogenic nematodes for the future viticulture: exploring their use against biotic threats and as bioindicators of soil health
Figure 3. Preventive inhibition growth effect against Botrytis cinerea over grapevine leaves three days after the infection. A. Destilled water (control treatment). B. Xenorhabdus nematophilus natural products treatment.
Figure 4 in Assessment of entomopathogenic nematodes and their symbiotic bacteria to control the stink bugs Euschistus heros and Dichelops melacanthus (Heteroptera: Pentatomidae) in the soybean-corn succession system
Figure 4. Corrected mortality of Euschistus heros (Abbott formula) 7 days after its exposition to Steinernema diaprepesi AM163 at the rates of 0.7, 3.5, 17.6, 88.4 and 442.32 IJs/cm2. Curve generated by logarithm regression between rates and mortalities.
Figure 2. a in Assessment of entomopathogenic nematodes and their symbiotic bacteria to control the stink bugs Euschistus heros and Dichelops melacanthus (Heteroptera: Pentatomidae) in the soybean-corn succession system
Figure 2. a) Euschistus heros adults killed by Steinernema diaprepesi, b) nematodes emerging from the insect's cadaver.
Figure 2 in The lure of hidden death: development of an attract-and-kill strategy against Agriotes obscurus (Coleoptera: Elateridae) combining semiochemicals and entomopathogenic nematodes
Figure 2. Proportion of eating wireworms over time after the application of two different nematode strains (χ2 = 56.77, p <0.001). Light bars correspond to the treatments without potato extract, and the dark bars correspond to the treatments with addition of potato extract. Error bars represent 95% confidence intervals.
Figure 5 in Indiscriminate ingestion of entomopathogenic nematodes and their symbiotic bacteria by Aedes aegypti larvae: a novel strategy to control the vector of Chikungunya, dengue and yellow fever
Figure 5. Aedes aegypti larval mortality when exposed to 1000 infective juveniles (IJs) of Heterorhabditis bacteriophora in different volumes of water.
Figure 2 in Compatibility of entomopathogenic nematodes with plant extracts and post-exposure virulence test under laboratory condition
Figure 2. Percentage survival of the individual EPN species at different concentrations of aqueous and ethanol extracts of A. amatymbica and E. elephantina. Vertical bars illustrate the standard error of the mean (n = 3).
Figure1 in Indiscriminate ingestion of entomopathogenic nematodes and their symbiotic bacteria by Aedes aegypti larvae: a novel strategy to control the vector of Chikungunya, dengue and yellow fever
Figure1. Susceptibility of Aedes aegypti larvae to different species of EPNs. Five 3rd instar larvae exposed to 500 infective juveniles (IJs) and mortality assessed daily at 1-day, 2- and 3-days post-inoculation (DPI).
Figure 8 in Basic laboratory and field manual for conducting research with the entomopathogenic nematodes, Steinernema and Heterorhabditis, and their bacterial symbionts
Figure 8. Scanning electron microscopy images of Steinernema beitlechemi male. A, B: First generation male. A: Tail with paired genital papillae (numbered), single papilla (s) and post-deirid (arrow), dorso-lateral; B: Spicules with rounded tip, ventro-lateral. C–E: Secondgeneration male. C: Tail with paired genital papillae (numbered), single papilla (s) and postdeirid (arrow), lateral; D: Postdeirid, detail; E: Tail with part of paired genital papillae (numbered), single papilla (s) and mucron (m), ventro-lateral.
Figure 9 in Basic laboratory and field manual for conducting research with the entomopathogenic nematodes, Steinernema and Heterorhabditis, and their bacterial symbionts
Figure 9. Light microscopy (LM) images of infective juvenile, male and female of Steinernema biddulphi. A, C. First generation female. A. Tail region. C. Vulval region. B, D. Second generation female. B. Tail region. D. Vulval region. E. First generation male, tail with spicules and gubernaculum. F. Second generation male, tail with spicules and gubernaculum. G, H. Infective juvenile. G. Anterior portion showing rounded head and excretory pore (arrow). H. Tail with anus and hyaline region.
Figure 2 in New insights on the impact of earthworm extract on the growth of beneficial soil fungi: species-specific alteration of the nematophagous fungal growth and limitation of an entomopathogenic fungus
Figure 2. Growth of Arthrobotrys musiformis after 20 days postexposer to two different earthworm based media: fresh earthworms (FE) (four concentration C1, C2, C3, and C4), and earthworms devoid of gut contents (EDG) (four concentration C1, C2, C3, and C4), C1 = 40 g/L, C2 = 20 g/L, C3 = 10 g/L, C4 = 5 g/L, and two rich media: potato dextrose agar (PDA), and brain heart infusion (BHI).
Data from: Experimental evolution to increase the efficacy of the entomopathogenic fungus Beauveria bassiana against malaria mosquitoes: effects on mycelial growth and virulence
Entomopathogenic fungi such as Beauveria bassiana are currently considered as a potential control agent for malaria mosquitoes. The success of such strategies depends among others on the efficacy of the fungus to kill its hosts. As B. bassiana can use various resources for growth and reproduction, increasing the dependency on mosquitoes as a nutritional source may be instrumental for reaching this goal. Passage of entomopathogenic fungi through an insect host has been shown to increase its virulence. We evaluated the virulence, fungal outgrowth, mycelial growth rate, and sporulation rate of two B. bassiana isolates (Bb1520 and Bb8028) that underwent 10 consecutive selection cycles through malaria mosquitoes (Anopheles coluzzii) using an experimental evolution approach. This cycling resulted in an altered capacity of evolved B. Bassiana lineages to grow on different substrates while maintaining the ability to kill insects. Notably, however, there were no significant changes in virulence or speed of outgrowth when comparing the evolved lineages against their un-evolved ancestors. These results suggest that fungal growth and sporulation evolved through successive and exclusive use of an insect host as a nutritional resource. We discuss the results in the light of biocontrol and provide suggestions to increase fungal virulence.
Supplementary material 1 from: Sun T, Zou W, Dong Q, Huang O, Tang D, Yu H (2022) Morphology, phylogeny, mitogenomics and metagenomics reveal a new entomopathogenic fungus Ophiocordyceps nujiangensis (Hypocreales, Ophiocordycipitaceae) from Southwestern China. MycoKeys 94: 91-108. https://doi.org/10.3897/mycokeys.94.89425
Relevant species information and GeneBank accession numbers for phylogenetic research in this study
Figure 4 in Entomopathogenic Fungi as Mortality Factors of Macadamia Felted Coccid, Eriococcus ironsidei (Hemiptera: Eriococcidae) in Hawaii
Figure 4. Mean mortality (±SEM) of E. ironsidei after dipping in increasing conidial concentrations of C. griseum. Bars with different letters differ significantly (α = 0.05) by LSD.
FIGURE 1 in Morphological and molecular profiling of an entomopathogenic nematode Steinernema feltiae: Unlocking its biocontrol potential against vegetable insect pests
FIGURE 1. Map showing soil sampling sites for isolation of entomopathogenic nematodes.
Data from: Experimental evolution to increase the efficacy of the entomopathogenic fungus Beauveria bassiana against malaria mosquitoes: effects on mycelial growth and virulence
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Data from: Physiological and transcriptional immune responses of a non-model arthropod to infection with different entomopathogenic groups
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