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  • 1
    Online Resource
    Online Resource
    Eficiência de bioinseticidas no controle de Mahanarva fimbriolata (Hemiptera: Cercopidae) em condições de campo
    Research, Society and Development ; 2020
    In:  Research, Society and Development Vol. 9, No. 7 ( 2020-05-30), p. e573974581-
    Details
    In: Research, Society and Development, Research, Society and Development, Vol. 9, No. 7 ( 2020-05-30), p. e573974581-
    Abstract: Ao se alimentarem das raízes, as ninfas de Mahanarva fimbriolata provocam lesões no sistema vascular, comprometendo o transporte de água e nutrientes para as regiões meristemáticas da planta. O objetivo deste estudo foi avaliar a eficiência de controle de M. fimbriolata utilizando isolados comerciais de M. anisopliae e inseticida imidacloprido em condições de campo. O delineamento experimental foi em blocos casualizados com 4 tratamentos: Metarril®, Metiê®, Evidence® 700 WG, Controle; e 4 repetições com 750 m2 cada. Os bioinseticidas foram aplicados na concentração de 1,5×1012 conídios viáveis por hectare e o inseticida Evidence® 700 WG na dose de 400 g ha-1 do produto comercial. Avaliações foram realizadas aos 30, 60, 90 e 120 DAP e os dados submetidos ao teste F, teste de Tukey a P ≤ 0,05 e eficiência calculada através da fórmula de Abbott. Todos os bioinseticidas proporcionaram alta redução do número de ninfas de cigarrinha-das-raízes (95%) a partir dos 30 até 120 dias após pulverização (DAP). Aos 60, 90 e 120 DAP os bioinseticidas proporcionaram acima de 84% de eficiência quando comparado ao inseticida. Para adultos os bioinseticidas Metarril® e Metiê® causaram maior redução de insetos vivos e foram mais eficientes que o inseticida Evidence® 700 WG, proporcionando eficiência de 100%. Os bioinseticidas Metarril® e Metiê® proporcionaram melhor performance sendo eficientes no manejo de M. fimbriolata.
    Type of Medium: Online Resource
    ISSN: 2525-3409
    URL: Article
    DOI: 10.33448/rsd-v9i7.4581
    Language: Unknown
    Publisher: Research, Society and Development
    Publication Date: 2020
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  • 2
    Online Resource
    Online Resource
    HYDRATION LEVELS ON CONIDIAL PRODUCTION OF Metarhizium rileyi (Ascomycota) IN SOLID GROWING MEDIUM
    State University of Mato Grosso do Sul ; 2019
    In:  REVISTA DE AGRICULTURA NEOTROPICAL Vol. 6, No. 3 ( 2019-08-19), p. 48-52
    Details
    In: REVISTA DE AGRICULTURA NEOTROPICAL, State University of Mato Grosso do Sul, Vol. 6, No. 3 ( 2019-08-19), p. 48-52
    Abstract: This study aimed to evaluate the conidial production of Metarhizium rileyi in rice with different water volumes. The bioassay was composed by completely randomized design (CRD), with four treatments (20, 30, 40 and 50 mL of distilled water), being added 100 g of rice thin and long, making a total of 10 plastic bags per treatment, which were autoclaved for 15 minutes at 1.0 atm pressure, to 120 ºC. After the cooling of the rice, were added in each plastic bag, 2.0 mL of suspension containing 1 × 108 conidia mL-1. Then the bags were incubated for ten days in a germination chamber (BOD type) at 25 °C (±1 °C), 80% (±10%) relative humidity and 12h photoperiod to promote conidial germination and growth of the fungus, being performed a mild agitation every two days. The use of higher water volume resulted in greater conidial production and greater number of viable conidia. However, the highest rate of conidia germination was obtained with the use of 30 mL of water, is this the volume of water that corresponds to the best results.
    Type of Medium: Online Resource
    ISSN: 2358-6303
    URL: Issue
    URL: Article
    DOI: 10.32404/rean.v6i3
    DOI: 10.32404/rean.v6i3.2899
    Language: Unknown
    Publisher: State University of Mato Grosso do Sul
    Publication Date: 2019
    detail.hit.zdb_id: 2942794-0
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  • 3
    Online Resource
    Online Resource
    PERFORMANCE OF Metarhizium rileyi APPLIED ON Helicoverpa armigera (Hubner) (Lepidoptera: Noctuidae)
    State University of Mato Grosso do Sul ; 2020
    In:  REVISTA DE AGRICULTURA NEOTROPICAL Vol. 7, No. 1 ( 2020-04-03), p. 60-65
    Details
    In: REVISTA DE AGRICULTURA NEOTROPICAL, State University of Mato Grosso do Sul, Vol. 7, No. 1 ( 2020-04-03), p. 60-65
    Abstract: This study aimed to evaluate the efficiency of different strains of the entomopathogenic fungus Metarhizium rileyi in the control of Helicoverpa armigera caterpillars in laboratory conditions. Caterpillars between the 2nd and 3rd instar were used, ranging in size from 0.7 to 1.2 cm length. The experimental design used was completely randomized, composed of five treatments and five replications, each one consisting of 50 insects. The treatments T1 - Control (sterile distilled water), T2 - M. rileyi UFMS 02 strain, T3 - M. rileyi UFMS 03 strain, T4 - M. rileyi UFMS 06 strain, and T5 - M. rileyi UFMS 07 strain were evaluated. All treatments were applied (2 mL/insect) in suspensions of the order of 1.0 × 109 conidia mL-1, and Tween 80® was added in all treatments. Evaluations were performed daily to verify mortality and sublethal effects. For emerging adults, Filial Generation (FG), the biological cycle was evaluated. The data referring to larval mortality for the Parental Generation (PG) and GF and pupal for GF were submitted to analysis of variance, and the Scott-Knott test grouped the averages at 5% probability. The strains tested did not provide pathogenicity in the larval phase of H. armigera for PG and FG. However, there was a reduction in oviposition in all treatments regarding the control. There was an effect on the reproductive phase of GF caterpillars exposed to M. rileyi.
    Type of Medium: Online Resource
    ISSN: 2358-6303
    URL: Issue
    URL: Article
    DOI: 10.32404/rean.v7i1
    DOI: 10.32404/rean.v7i1.4208
    Language: Unknown
    Publisher: State University of Mato Grosso do Sul
    Publication Date: 2020
    detail.hit.zdb_id: 2942794-0
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  • 4
    Online Resource
    Online Resource
    Interactions between Fungal-Infected Helicoverpa armigera and the Predator Chrysoperla externa
    MDPI AG ; 2019
    In:  Insects Vol. 10, No. 10 ( 2019-09-20), p. 309-
    Details
    In: Insects, MDPI AG, Vol. 10, No. 10 ( 2019-09-20), p. 309-
    Abstract: The aim of the present study was to evaluate the interactions between Chrysoperla externa (Hagen, 1861) and the eggs and first-instar larvae of Helicoverpa armigera (Hübner 1805) infected by entomopathogenic fungi. The H. armigera eggs and larvae were treated with sterile distilled water + 0.01% Tween 80 (T1, control), Beauveria bassiana (Bals.) Vuill (T2), Metarhizium anisopliae (Metsch.) Sorok (T3), or Metarhizium rileyi (Farlow) Samson. (T4) at different concentrations (1 × 107, 1 × 108, and 1 × 109 con. mL−1). For each treatment, a single third-instar C. externa was offered prey (a combination of 80 eggs and 50 first-instar H. armigera larvae) at 0, 24, and 48 h after inoculation. Ten trials were completed for each treatment, and the entire experiment was repeated three times. Neither the concentrations of fungi nor the application method affected consumption by C. externa. Because all the predator larvae reached the pupal phase, with 100% viability in adults, these results suggest that entomopathogenic fungi and C. externa are compatible and that the simultaneous use of these biological control agents is possible for managing H. armigera.
    Type of Medium: Online Resource
    ISSN: 2075-4450
    URL: Article
    DOI: 10.3390/insects10100309
    Language: English
    Publisher: MDPI AG
    Publication Date: 2019
    detail.hit.zdb_id: 2662247-6
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