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80 results for “Beauveria bassiana”
Figure 1 in Laboratory evaluation of Beauveria bassiana, some plant oils and insect growth regulators against two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae)
Figure 1. Infection caused by Beauveria bassiana on Tetranychus urticae, (a, b) dead female mites due to mycosis, (c) dead mite in control.
Figure 3 in Late effects of Beauveria bassiana on larval stages of Aedes aegypti Linneo, 1762 (Diptera: Culicidae)
Figure 3. Biological cycle of Ae. aegypti, phase to phase time contrast in the survivors of the tested strains and the daily cycle according to the literature under laboratory conditions [25 ± 2 ° C; 12:12 h (light: darkness)].
Figure 2 in Late effects of Beauveria bassiana on larval stages of Aedes aegypti Linneo, 1762 (Diptera: Culicidae)
Figure 2. Mortality of Aedes aegypti larvae by conidia of Beauveria bassiana (NB3 and GHA strain) in different development phase under laboratory conditions [25 ± 2 ° C; 12:12 h (light: darkness). Treatments with different letters are significantly different (p≤0.05).
Fig. 3 in Effects of a pathogenic Beauveria bassiana (Hypocreales: Cordycipitaceae) strain on detoxifying and protective enzyme activities in Xylotrechus rusticus (Coleoptera: Cerambycidae) larvae
Fig. 3. Effects of infection by Beauveria bassiana strain BbCC01 on protective enzyme activity in Xylotrechus rusticus larvae over time. A. Catalase (CAT). B. Peroxidase (POD). C. Superoxide dismutase (SOD). Data are expressed as mean ± SE (n = 3). Different letters indicate significant differences between means (P <0.05).
Fig. 4 in Effects of a pathogenic Beauveria bassiana (Hypocreales: Cordycipitaceae) strain on detoxifying and protective enzyme activities in Xylotrechus rusticus (Coleoptera: Cerambycidae) larvae
Fig. 4. Change of the protein content in Xylotrechus rusticus larvae infected with Beauveria bassiana strain BbCC01. Data are expressed as mean ± SE (n = 3). Different letters indicate significant differences between means (P <0.05).
Fig. 2 in Effects of a pathogenic Beauveria bassiana (Hypocreales: Cordycipitaceae) strain on detoxifying and protective enzyme activities in Xylotrechus rusticus (Coleoptera: Cerambycidae) larvae
Fig. 2. Effects of infection by Beauveria bassiana strain BbCC01 on detoxifying enzyme activity in Xylotrechus rusticus larvae over time. A. Carboxylesterase (CarE). B. Glutathione S-transferase (GST). C. Acetylesterase (AchE). Data are expressed as mean ± SE (n = 3). Different letters indicate significant differences between means (P <0.05).
Fig. 1 in Infection of Anastrepha ludens (Diptera: Tephritidae) adults during emergence from soil treated with Beauveria bassiana under various texture, humidity, and temperature conditions
Fig. 1. Adult mortality of Anastrepha ludens infected with different concentrations of Beauveria bassiana conidia, afer emerging from treated soil. Different letters indicate significant differences among treatments based on 1-way ANOVA followed by the Tukey Honest Significant Difference test, P <0.05).
Fig. 2 in Lethal and sub-lethal effects of Beauveria bassiana (Cordycipitaceae) strain NI8 on Chrysoperla rufilabris (Neuroptera: Chrysopidae)
Fig. 2. Cumulative mortality of Chrysoperla rufilabris females at 3, 5, and 10 d exposed to Beauveria bassiana strain NI8 at different concentrations (spores per mm2) under laboratory conditions. Insects were fed with a Lygus species solid diet afer being sprayed with fungus. Columns within the group labeled with a different letter were significant different at P = 0.05 (Tukey Honest Significant Difference test).
Figure 2 in Orientation of Hippodamia variegata (Coleoptera: Coccinellidae) to healthy and Beauveria bassiana-infected Aphis fabae (Hemiptera: Aphididae) in an olfactometer system
Figure 2. Response of Hippodamia variegata to broad bean plants infested by A. fabae infected by Beauveria bassiana at the interval of 0 h after infection versus broad bean plants infested by A. fabae infected by B. bassiana at intervals of 24 (a), 48 (b), and 72 (c) h after infection. The white bars indicate the numbers of insects choosing broad bean plants infested by A. fabae infected by B. bassiana at intervals of 24, 48, and 72 h after infection, whereas the black bars indicate the numbers of insects that chose broad bean plants infested by A. fabae infected by B. bassiana at the interval of 0 h after infection.
Figure 4 in Orientation of Hippodamia variegata (Coleoptera: Coccinellidae) to healthy and Beauveria bassiana-infected Aphis fabae (Hemiptera: Aphididae) in an olfactometer system
Figure 4. Response of Hippodamia variegata to broad bean plants infested by A. fabae infected by Beauveria bassiana at the interval of 48 h after infection versus broad bean plants infested by A. fabae infected by B. bassiana at the interval of 72 h after infection. The white bars indicate the numbers of insects choosing broad bean plants infested by A. fabae infected by B. bassiana at the interval of 72 h after infection, whereas the black bars indicate the numbers of insects that chose broad bean plants infested by A. fabae infected by B. bassiana at the interval of 48 h after infection.
Data from: Compatibility of the fungus Beauveria bassiana and Trichoplusia ni SNPV against the cabbage looper Trichoplusia ni : crop plant matters
<p>BACKGROUND: Microbial insecticides are an important weapon in insect pest management, but their use is still relatively limited. One approach for increasing their efficacy and use could be to combine different pathogens to increase pest mortality. However, little is known about whether increasing pathogen diversity will improve pest management. Here, we investigated the compatibility of two pathogens for the management of the cabbage looper, <em>Trichoplusia ni</em>; T. ni nucleopolyhedrovirus (TniSNPV) and the entomopathogenic fungus <em>Beauveria bassiana </em>on two crops, tomato and broccoli. The pathogens were applied to individual plants using ultra low volume sprays, alone or in combination, either synchronously or asynchronously. Healthy 3rd instar <em>T. ni</em> larvae were introduced to the plants before application and collected by destructive sampling 24h after the last pathogen application.</p> <p>RESULTS: Combined applications did not result in an increase in larval mortality compared to TniSNPV alone, although mortality was generally high. <em>Beauveria bassiana</em> was considerably less effective on broccoli compared to tomato. In both the combined treatments, virus-induced mortality was approximately 50% lower when applied together with the fungus, while fungus-induced mortality was not affected by the virus, even when the virus was introduced 24h before the fungus.</p> <p>CONCLUSION: While our results suggest that applying this combination of entomopathogens would not be beneficial for pest management, this study illustrates the need to consider the target crop as an important driver of the efficacy of both single and mixed pathogen applications in the field.</p>
Conidia productivity and whitefly insecticidal activity of Beauveria bassiana JEF-507
<p>Silverleaf whitefly, <em>Bemisia tabaci</em> (Hemiptera: Aleyrodidae), is a destructive insect pest damaging to diverse crops by vectoring several plant pathogenic viruses, which consequently causes economic losses in crop production. As the resistance of whiteflies to chemical insecticides is increasing, this study aims to investigate the potential of entomopathogenic fungi as an alternative. A total of 72 entomopathogenic fungal isolates, collected from soils using <em>Tenebrio molitor</em> larvae as an insect baiting method, were assessed for their virulence against 2<sup>nd</sup> nymphs of whitefly. Their virulence was assayed by dipping whitefly-infested tomato leaves in fungal conidia suspensions at 1.0 × 10<sup>7</sup> conidia/ml. Among the tested isolates, two isolates of <em>Beauveria bassiana</em> JEF-462 and JEF-507 showed high virulence. In the assessment of virulence depending on conidia concentrations, the estimated LC<sub>50</sub> values for JEF-462 and JEF-507 were similarly 8.7~14.0 × 10<sup>7</sup> conidia/ml. However, <em>B. bassiana</em> JEF-507 showed higher conidial productivity and thermotolerance on most of tested 12 grain substrates than<em> </em><em>B. bassiana</em> JEF-462, and millet was the most suitable grain substrate. Additionally, siloxane as a surfactant was able to sufficiently exhibit the insecticidal activity of JEF-507 against whitefly nymphs compared to other surfactants. In a pot-based greenhouse trial, JEF-507 showed higher control efficacy than chemical insecticides, dinotefuran and spinetoram. This work suggests that <em>B. bassiana</em> JEF-507 could be competitively used as a biopesticide to control silverleaf whiteflies whilst overcoming current resistance issues. The JEF-507 isolate has been registered in Korea, 2022 and successfully commercialized as the name of Chongchae-Stop<sup>®</sup> in this local market to control whitefly and thrips.</p>
Exploring the activity of Chrysoperla carnea (Neuroptera: Chrysopidae) and Beauveria bassiana (Ascomycota: Hypocreales) on Neophilaenus campestris (Hemiptera: Aphrophoridae), vector of Xylella fastidiosa
<p>Raw data and R codes from the study "Exploring the activity of Chrysoperla carnea (Neuroptera: Chrysopidae) and Beauveria bassiana (Ascomycota: Hypocreales) on Neophilaenus campestris (Hemiptera: Aphrophoridae), vector of Xylella fastidiosa"</p>
Data from: Insect-microbe-fungus interplay in citrus agro-ecosystems: Cuticular symbionts mediate <em>Diaphorina citri</em> resistance to <em>Beauveria bassiana</em>
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Conidia productivity and whitefly insecticidal activity of Beauveria bassiana JEF-507
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Data from: Compatibility of the fungus Beauveria bassiana and Trichoplusia ni SNPV against the cabbage looper Trichoplusia ni : crop plant matters
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Insecticidal activity of Beauveria bassiana against Monochamus alternatus adults
<p><em><span>Monochamus alternatus</span></em><span> is a major forest pest that spreads pine wilt disease in pine trees as a vector of pine wilt nematodes. Chemical insecticides used as fumigants to control overwintering <em>M. alternatus</em> in forests are highly toxic to the environment, so we investigated entomopathogenic fungus <em>Beauveria bassiana</em> ERL836 as an eco-friendly and alternative material to control overwintering <em>M. alternatus</em>. In this work, we evaluated the insecticidal activity of <em>B. bassiana</em> ERL836 against <em>M. alternatus</em> adults, the possibility of fungal colonization on pine tree bark, and finally the control efficacy of fungal pre-treatment on pine tree logs against emerging M. alternatus adults in semi-field and field conditions. <em>M. alternatus</em> adults were killed on the pine trees logs pre-treated with the <em>B. bassiana</em> ERL836. White conidia were observed not only on the surface of the dead adults but also on the pine tree logs, suggesting that the adults were killed by the fungus on the pine. A formulated ERL836 powder treatment on larvae-infested pine logs showed high insecticidal activity against adults, similar to that with the fungal powder suspension treatment, but we demonstrated that using the fungal powder was simpler than using the suspension in field conditions. Even in the field condition, the fungal powder treatment showed high insecticidal activity against <em>M. alternatus</em> adults, which we attribute to its ability to maintain fungal activity for a long time in field conditions by covering the pine tree logs with a film during overwintering. We confirmed that the risk that fungus-infected <em>M. alternatus</em> adults would spread the fungus to other non-target forest insects was low. Thus, even a high-concentration treatment in a specific area is unlikely to transmit the fungus outside that area, so it can be safely used to control this pine wilt nematode vector in forest ecosystems.</span></p>
FIGURE 8 in The RNA-seq approach to discriminate gene expression profiles in response to Beauveria bassiana and Micrococcus luteus microbial pathogens on Actias selene (Lepidoptera: Saturniidae)
FIGURE 8. Phylogenetic analysis was performed using the MEGA (version 5.0) program based on the four different amino acid sequences from various insects. The phylogenetic tree was constructed using the neighbor-joining algorithm method and bootstrap values (1000 repetitions) of the branches are indicated. The HSP90s from other organisms are: Antheraea pernyi (APX61061.1), Helicoverpa armigera (ATB54999.1), Spodoptera litura (ADK55517.2), Mythimna separata (ATN45250.1), Danaus plexippus plexippus (OWR53421.1), Bombyx mori (NP_001036876.1), Apis mellifera (NP_001153536.1), Plutella xylostella (NP_001296043.1), Drosophila melanogaster (NP_523899.1), Nilaparvata lugens (XP_022202749.1), Bicyclus anynana (XP_023945769.1);The PGRPs from other organisms are: Antheraea pernyi (AME17978.1), Samia ricini (BAF03522.1), Trichoplusia ni (XP_026737257.1), Helicoverpa armigera (AHK59818.1), Antheraea mylitta (ABG72709.1), Manduca sexta (AAO21509.1), Spodoptera litura (XP_022825445.1), Bombyx mori (NP_001036836.1);The Ras homolog genes from other organisms are: Spodoptera litura (XP_022819713.1), Vanessa tameamea (XP_026494920.1), Zootermopsis nevadensis (XP_021927562.1), Drosophila miranda (XP_017145574.1), Drosophila persimilis (XP_002015385.2), Nasonia vitripennis (XP_008209835.1); The MyD88s from other organisms are: Diaphorina citri (NP_001316117.1),Tribolium castaneum (XP_008190563.1), Drosophila melanogaster (NP_610479.1), Nasonia vitripennis (XP_008206894.1), Ceratitis capitata (XP_020716287.1), Bactrocera dorsalis (XP_011205590.1), Bombus terrestris (XP_003394201.1), Bombyx mori (XP_004921572.1), Antheraea pernyi (AHH80650.1).
FIGURE 7 in The RNA-seq approach to discriminate gene expression profiles in response to Beauveria bassiana and Micrococcus luteus microbial pathogens on Actias selene (Lepidoptera: Saturniidae)
FIGURE 7. RT-qPCR analysis of 11 immune-related DEGs in ML vs. PBS group. The y-axis shows relative expression levels (Blue colour represents the PBS control group and yellow colour represents the M. luteus treatment group, * p <0.05, **p <0.01).
FIGURE 6 in The RNA-seq approach to discriminate gene expression profiles in response to Beauveria bassiana and Micrococcus luteus microbial pathogens on Actias selene (Lepidoptera: Saturniidae)
FIGURE 6. RT-qPCR analysis of 19 immune-related DEGs in Bb vs. PBS group. The y-axis shows relative expression levels (Blue colour represents the PBS control group and red colour represents the B. bassiana treatment group, * p <0.05, **p <0.01).
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