scholarly journals Inoculation of cucumber plants with Beauveria bassiana enhances resistance to Aphis gossypii (Hemiptera: Aphididae) and increases aphid susceptibility to pirimicarb

2022 ◽  
Vol 119 ◽  
pp. 1-11
Author(s):  
Mohammad HOMAYOONZADEH ◽  
Mojtaba ESMAEILY ◽  
Khalil TALEBI ◽  
Hossein ALLAHYARI ◽  
Stuart REITZ ◽  
...  
Keyword(s):  
Beauveria Bassiana ◽  
Aphis Gossypii

scholarly journals CONSUMO DE APHIS GOSSYPII GLOVER, 1877 E MYZUS PERSICAE (SULZER, 1776) INFECTADOS COM FUNGOS ENTOMOPATOGÊNICOS POR ORIUS INSIDIOSUS (SAY, 1832) (HEMIPTERA, ANTHOCORIDAE)

2008 ◽  
Vol 75 (4) ◽  
pp. 491-498
Author(s):  
E.S. Loureiro ◽  
A. Moino Júnior
Keyword(s):  
Beauveria Bassiana ◽  
Myzus Persicae ◽  
Metarhizium Anisopliae ◽  
Aphis Gossypii ◽  
Orius Insidiosus ◽  
Isaria Fumosorosea ◽  
Lecanicillium Lecanii ◽  
Aphis Gossypii Glover

RESUMO As espécies de pulgões Aphis gossypii e Myzus persicae são cosmopolitas e polífagas, causando prejuízos em plantas cultivadas. Foi avaliado o consumo de A.gossypii e M. persicae, infectados com fungos entomopatogênicos por Orius insidiosus. No centro de placas de Petri foi colocado um disco de 4,5 cm de diâmetro de folha de algodão (para A. gossypii) e um disco de 4,5 cm de diâmetro de folha de pimentão (para M. persicae). A inoculação dos fungos (Beauveria bassiana, Metarhizium anisopliae, Isaria fumosorosea e Lecanicillium lecanii) foi feita através da adição de 1 mL das suspensões fúngicas 1,0 x 105 e 1,0 x 107 conídios/mL sobre a placa de Petri. Os pulgões foram oferecidos a uma fêmea do predador, liberada na placa em diferentes períodos de tempo após a inoculação, além de um tratamento no qual a fêmea do predador foi liberada com os pulgões mortos, já em fase de conidiogênese. As fêmeas do predador foram retiradas após 24 horas da liberação e, em seguida, foi avaliado o consumo de pulgões. O consumo foi significativamente inferior decorridas 24 horas da inoculação, quando comparado com o a testemunha, para as duas espécies de pulgões estudadas. O consumo de pulgões foi menor nas concentrações testadas no período de 24-48 horas que o consumo da testemunha. Após 72 horas da inoculação e após conidiogênese, não foi observado consumo de pulgões pelo predador para as duas concentrações, evidenciando, dessa forma, a capacidade discriminatória do predador, sendo capaz de reconhecer a presa infectada pelo patógeno.

scholarly journals Insecticidal activity and sublethal effects of Beauveria bassiana (Bals.-Criv.) Vuill. isolates and essential oils against Aphis gossypii Glover, 1877 (Hemiptera: Aphididae)

2020 ◽  
Vol 115 (2) ◽  
pp. 463
Author(s):  
Mahdieh MOUSAVI ◽  
Youbert GHOSTA ◽  
Nariman MAROOFPOUR
Keyword(s):  
Essential Oils ◽  
Life Table ◽  
Beauveria Bassiana ◽  
Insecticidal Activity ◽  
Aphis Gossypii ◽  
Population Increase ◽  
Intrinsic Rate Of Increase ◽  
Reproduction Rate ◽  
Net Reproductive Rate ◽  
Rate Of Increase

<p>The cotton aphid, <em>Aphis gossypii</em> Glover, 1877, is a polyphagous species and one of the most important pests of cucumber crops in Iran. In this study, virulence of three <em>Beauveria bassiana </em>(Bals.-Criv.) Vuill isolates, IRAN 108, IRAN 429C and LRC 137, as well as insecticidal activity of two essential oils extracted from <em>Matricaria chamomilla</em> L. and <em>Cuminum cyminum </em>L. were evaluated against adult stage of <em>A. gossypii </em>under laboratory conditions. The data for life table were analyzed using the age-stage, two-sex life table theory. Results showed that all isolates were pathogenic on aphid, but their virulence was varied in different isolates. The lowest calculated LC<sub>50</sub> was belonged to IRAN 429C (3.9 × 10<sup>4</sup>conidia ml<sup>-1</sup>). The lowest LT<sub>50</sub> was obtained at concentration of 10<sup>8</sup> and 10<sup>7</sup> conidia ml<sup>-1</sup> for IRAN 429C (2.9 and 3.55 days, respectively). <em>M. chamomilla</em> essential oil had the lowest LC<sub>50</sub> and LT<sub>50</sub> values (19 µl l<sup>-1</sup> air and 11.4 h), respectively. Longevity and population growth parameters, including the intrinsic rate of increase (<em>r<sub>m</sub></em>), gross reproduction rate (<em>GRR</em>), net reproductive rate (<em>R</em><sub>0</sub>), generation time (<em>T</em>) and finite rate of population increase (<em>λ</em>), were affected negatively by both agents. According to the results obtained in this study, both entomopathogenic fungi and essential oils could be used as an alternative to chemical insecticides in aphid IPM programs.</p>

scholarly journals Suitability of five plant species extracts for their compatibility with indigenous Beauveria bassiana against Aphis gossypii Glov. (Hemiptera: Aphididae)

2021 ◽  
Vol 31 (1) ◽  
Author(s):  
Samy Sayed ◽  
Sayed-Ashraf Elarnaouty ◽  
Esmat Ali
Keyword(s):  
Plant Species ◽  
Beauveria Bassiana ◽  
Plant Extract ◽  
Plant Extracts ◽  
Aphis Gossypii ◽  
Plant Viruses ◽  
The Other ◽  
Single Treatment ◽  
Combined Treatments ◽  
Wide Range

Abstract Background The cotton aphid, Aphis gossypii Glov. (Hemiptera: Aphididae), is a major insect pest on a wide range of plants that causes high damage and transmits plant viruses. This study was carried out to evaluate an indigenous isolate, Beauveria bassiana (Bb), and extracts of 5 plant species: Psiadia penninervia, Pulicaria crispa, Euryops arabicus, Salvia officinalis, and Ochradenus baccatus against A. gossypii, as individual and combined treatments to estimate their compatibility under laboratory conditions. Also, the antifungal activity of these plant extracts against B. bassiana was evaluated. Results LC50 value was 8.64 × 104 spores/ml of Bb against A. gossypii, while LC50 values of the tested 5 plant extracts on A. gossypii were 103.64, 879.92, 747.90, 783.28, and 262.42 μg/ml for P. penninervia, P. crispa, E. arabicus, S. officinalis, and O. baccatus, respectively. Both P. penninervia and O. baccatus extracts had the highest antifungal activities against Bb and were significantly different from the other 3 plant extracts. After 24 h of treatment with the combination of Bb and each extract, no effect for these combinations on A. gossypii mortality was recorded. Meanwhile, 5 days after treatment, the combined treatments between Bb and each plant extract achieved a significant increase in mortality than that of the single treatment with Bb or plant extract, except for P. penninervia extract, which did not achieve a significant mortality increase when combined with B. bassiana than that of its single treatment. Conclusion P. penninervia extract was not compatible with B. bassiana, but the other tested 4 plant extracts were compatible with B. bassiana. These 4 plant extracts could be used to control aphids in combinations with B. bassiana. Further laboratory and field investigations are needed to examine the effects of these plant extracts on other insect pests or associated beneficial insects.

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