Effect of media pH on the growth of Entomopathogenic Fungi isolated from different rhizosphere soils

We compared the ability of product formulations representing a synthetic pyrethroid acaricide (Talstar P Professional Insecticide), a natural product-based acaricide (Essentria IC3), and an entomopathogenic fungal acaricide (Met52 EC Bioinsecticide) to suppress Ixodes scapularis Say and Amblyomma americanum (L.) nymphs when applied following USEPA approved manufacturers’ label recommendations for tick control using hand-pumped knapsack sprayers before the beginning of their seasonal activity period in the spring. We applied Met52 EC Bioinsecticide (11% Metarhizium anisopliae Strain F52) to five 100 m2 plots (10.6 ml AI/plot) in mid-April 2020. Two weeks later at the end of April 2020, we treated an additional five 100 m2 plots each with either Talstar P Professional Insecticide (7.9% bifenthrin @ 2.5 ml AI/plot) or Essentria IC3 (10% rosemary oil, 5% geraniol, and 2% peppermint oil @ 86.6 ml AI/plot). Weekly sampling of all plots through the end of June 2020 showed that both Met52 EC Bioinsecticide and Essentria IC3 failed to maintain a 90% suppression threshold for I. scapularis, compared to control plots, and required two additional applications over the course of the trial. In contrast, Talstar P Professional Insecticide suppressed 100% of I. scapularis nymphs and ≥96 and 100% of A. americanum nymphs and adults, respectively. Such pre-season applications of synthetic pyrethroids significantly reduce the early season acarological risk for exposure to host-seeking ticks as well as the frequency of acaricide applications.

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Identification and in vitro Growth Characteristics of Entomopathogenic fungus-Aschersonia sp. in Bangladesh

Sikder¹,

Mallik²,

Alam³

2019

azb

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Entomopathogenic fungus-Aschersonia sp.was found in the potted plants in the experimental sites of the Department of Zoology, Jahangirnagar University, Bangladesh. Using tissue planting technique, fungus colony was recovered on PDA. Morphology characterization based on mycelium, conidia, colony features as well as sequencing of rDNA of isolated fungus resulted as Aschersonia sp. Vegetative growth of the fungus on different fungal culture media, temperature, pH, and the light were conducted. The optimum temperature, pH and light regimes for mycelial growth were recorded at 20°C, pH 7, alternate light and dark condition. The suitable mycelial growth of the fungus was obtained on potato sucrose agar, Richard agar, carrot agar media over ten different culture media studied. To the best of our knowledge, the occurrence of Aschersonia sp. in Bangladesh is a new record.

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Effect of media pH on the growth of Entomopathogenic Fungi isolated from different rhizosphere soils

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Thermal response and horizontal transmission of cameroonian isolates of the entomopathogenic fungi Beauveria bassiana and Metarhizium anisopliae – Candidates for microbial controls of the banana root borer Cosmopolites sordidus

Thermal response and horizontal transmission of cameroonian isolates of the entomopathogenic fungi Beauveria bassiana and Metarhizium anisopliae – Candidates for microbial controls of the banana root borer Cosmopolites sordidus

Synthetic Pyrethroid, Natural Product, and Entomopathogenic Fungal Acaricide Product Formulations for Sustained Early Season Suppression of Host-SeekingIxodes scapularis(Acari: Ixodidae) andAmblyomma americanumNymphs

Identification and in vitro Growth Characteristics of Entomopathogenic fungus-Aschersonia sp. in Bangladesh

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