Patogenicidade de Verticillium lecanii ao pulgão-do-pinus

Loureiro, Elisângela de Souza; Oliveira, Nádia Cristina de; Wilcken, Carlos Frederico; Filho, Antonio Batista

doi:10.1590/s0100-67622004000500017

Cited by 8 publications

(8 citation statements)

References 7 publications

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“…The highest percent mortality was observed after 10 days, while after 3 days, the mortality was the minimum. Almost similar results were reported by Loureiro et al (2004) who found an increase in mortality with the increase in time and concentration. Contrarily, Araujo et al (2009) reported (90%) mortality at the high concentration (10 7 spore/ml) of B. bassiana after 4.4 days.…”

Section: Resultssupporting

confidence: 88%

Pathogenicity of some entomopathogenic fungal strains to green peach aphid, Myzus persicae Sulzer (Homoptera: Aphididae)

Javed

Mukhtar

et al. 2019

Egypt J Biol Pest Control

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Pathogenicity of four fungal strains, two of Beauveria bassiana (designated as BB-72 and BB-252), and two of Lecanicillium lecanii (designated as V-4 and CS-625) to green peach aphid, Myzus persicae Sulzer (Homoptera: Aphididae) was assessed. All treatments showed highly significant effects on the mortality of the aphid when applied as filtrate or conidia. The application methods did not have a significant effect on the mortality rate. The overall mortalities caused by both applications were statistically similar. The maximum overall mortality was caused by BB-72, followed by CS-625 in both application methods. On the other hand, (V-4) caused the minimum mortality rate, followed by (BB-252), which was statistically similar to those caused by V-4. The time also had significant effects on aphid mortality rates. The mortality was the minimum after 3 days reaching its maximum after 10 days. As the number of days increased, there was a corresponding increase in the mortality showing a direct relationship between mortality and time. The maximum mean individual mortality of 95% was caused by CS-625, followed by BB-72 (92%) after 10 days with the conidial application. Similarly, the combined effects of the three most virulent fungal strains showed highly significant differences on the mortality of peach aphid. The combination BB-72 + BB-252 showed the highest percent mortality, followed by BB-72 + BB-252 + CS-625. The combinations BB-72 + CS-625 and BB-252 + CS-625 had statistically similar effects of causing aphid mortality.

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Section: Resultssupporting

confidence: 88%

Pathogenicity of some entomopathogenic fungal strains to green peach aphid, Myzus persicae Sulzer (Homoptera: Aphididae)

Javed

Mukhtar

et al. 2019

Egypt J Biol Pest Control

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“…The maximal effect was recorded after eight days, while the minimal effect was recorded after two days. These results are similar to research that showed an increase in the effect with the increase in time and concentration [39].…”

Section: Discussionsupporting

confidence: 91%

“…All concentrations were effective for the control of aphids, but the highest concentration (1 × 10 8 conidia mL −1 ) caused the highest percentage mortality [38]. The research was conducted for the determination of the virulence of V. lecanii and its result showed that concentration of 1 × 10 8 conidia mL −1 had the best effect, with an 86% mortality rate of nymphal observed after five days of application [39]. It was also reported that at concentrations of 10 7 and 10 8 conidia mL −1 of V. lecanii, the maximum mortality rate of M. persicae was recorded as 100% after 12 days of application [40].…”

Section: Discussionmentioning

confidence: 99%

Biocontrol Potential of Some Entomopathogenic Fungal Strains Against Bean Aphid Megoura japonica (Matsumura)

Trinh

Qiu

2020

Agriculture

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This research reported the in vitro pathogenicity of Verticillium lecanii strains, L2 and L5, and Beauveria bassiana strains, B76 and B252, against Megoura japonica using leaf-dip method. The virulence potential of these four entomopathogenic fungal strains of V. lecanii and of B. bassiana were compared between fungi conidia (concentrations 1 × 106, 1 × 107, and 1 × 108 conidia mL−1) and culture filtrate. Moreover, binary combination of four different fungal strains (L2 + B76, B76 + L5, L2 + B252, and L2 + B76 + B252 + L5) were evaluated against M. japonica under control condition. Aphid mortality was recorded after two, four, six, and eight days of post-treatment. In the conidial concentration bioassay, strain B76 showed maximal mortality (85.3%) against bean aphid, and strain L5 showed the lowest effect (60.0%) at the highest concentration (1 × 108 conidia mL−1) at eight days post-treatment. Whereas, binary combinations of B76 and L2 strains showed the highest effect against M. japonica (90.5%) than other combinations. Moreover, in comparison with the effect of filtrate and conidia bioassay, 91.4% and 84.1% were achieved in strain B76, and the lowest effect (63.8% and 55.1%) was recorded in strain L5.

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“…As 93, 86 and 79% mortality was found after 10 days of application at highest concentrations (1 × 10 8 conidia mL −1 ) of B. bassiana BB-72, B. bassiana BB-252, and L. lecanii V-4, respectively, while 94, 84, 80 and 78% mortality of aphids were caused after 10 days of application by fungal strain combinations of BB-72 (LC 50 ) + BB-252 (LC 50 ), BB-72 (LC 50 ) + V-4 (LC 50 ), BB-252 (LC 50 ) + V-4 (LC 50 ), and BB-72 (LC 33 ) + BB-252 (LC 33 ) + V-4 (LC 33 ), respectively. An experiment was conducted for the evaluation of pathogenicity of L. lecanii isolates and found that best concentration was 1 × 10 8 conidia mL −1 with 86% nymphal mortality observed after at five days of application [31]. These results also corroborate the conclusions of [32] who studied that maximum mortality was 100% recorded after 12 days of application (at 10 7 and 10 8 conidia mL −1 ) of L. lecanii bioassayed against 3rd instar nymphs of green peach aphid.…”

Section: Discussionmentioning

confidence: 99%

In Vitro Pathogenicity of Some Entomopathogenic Fungal Strains against Green Peach Aphid Myzus persicae (Homoptera: Aphididae)

et al. 2018

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Green peach aphid, Myzus persicae (Hemiptera: Aphididae), is an economically important pest of crops within more than 40 plant families all over the world. This study encompasses in-vitro pathogenicity of two strains of Beauveria bassiana (BB-72 and BB-252) and one strain of Lecanicillium lecanii (V-4) against green peach aphid (M. persicae). Using a leaf-dip method, three different bioassays were conducted comprised of filtrates and conidial concentrations of BB-72, BB-252 and V-4 fungal strains and their binary combinations. Infiltrate bioassays, 2 mL fungal filtrate of each strain was used. In conidial bioassays, three different concentrations (i.e., 1 × 106, 1 × 107 and 1 × 108 conidia mL−1) of each fungal strain were used, while in binary combination bioassays, LC50 and LC33 of these fungal strains were evaluated. According to the results, maximum pathogenicity against test aphids was observed at 10th day of all treatments. Both strains of B. bassiana (BB-72 and BB-252) exhibited higher mortality of aphids (up to 95 and 91%, respectively) than L. lecanii (V-4) strain (87%) in all three types of bioassays. Moreover, binary combinations of BB-72 and BB-252 strains showed significantly higher aphid mortality (94%) than other combinations. Reduced mortality in case of fungal combinations of V-4 strain might be due to the antagonistic effect of L. lecanii strain along with both strains of B. bassiana. Nevertheless, evaluation of combined pathogenicity of the fungal strains constitutes the novelty of this in-vitro study which revealed that both strains of B. bassiana (i.e., BB-72 and BB-252) are mutually compatible and can be utilized together as new biocontrol tools against destructive insect pests such as M. persicae.

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Patogenicidade de Verticillium lecanii ao pulgão-do-pinus

Cited by 8 publications

References 7 publications

Pathogenicity of some entomopathogenic fungal strains to green peach aphid, Myzus persicae Sulzer (Homoptera: Aphididae)

Pathogenicity of some entomopathogenic fungal strains to green peach aphid, Myzus persicae Sulzer (Homoptera: Aphididae)

Biocontrol Potential of Some Entomopathogenic Fungal Strains Against Bean Aphid Megoura japonica (Matsumura)

In Vitro Pathogenicity of Some Entomopathogenic Fungal Strains against Green Peach Aphid Myzus persicae (Homoptera: Aphididae)

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