Florida Entomologist (2018) 101, 249-253
Tamiris dos Santos Barbosa, Daniel Junior de Andrade, Ricardo Antonio Polanczyk and Rogério Teixeira Duarte (2018)
Susceptibility of Tetranychus ogmophallos (Acari: Tetranychidae) to Beauveria bassiana and Metarhizium anisopliae
Florida Entomologist 101 (2), 249-253
Abstract: Tetranychus ogmophallos Ferreira and Flechtmann (Acari: Tetranychidae) is an emergent pest in peanut (Arachis hypogaea L. [Fabaceae]) and an important pest of forage peanut (A. pintoi Krapov. and W.C. Greg. [Fabaceae]). The susceptibility of T. ogmophallos to Beauveria bassiana (Balsamo) Vuillemin (Cordycipitaceae) and Metarhizium anisopliae (Metschnikof) Sorokin (Clavicipitaceae) was evaluated under laboratory and greenhouse conditions. In the laboratory, adult T. ogmophallos females were treated with B. bassiana and M. anisopliae using a Potter's tower, and in the greenhouse, bio-insecticides were applied on infested peanut plants. Both fungal suspensions containing 108 conidia per mL caused greater mortality in adult T. ogmophallos females. At 7 d after treatment under laboratory conditions, B. bassiana resulted in 100% mortality and M. anisopliae almost 100% mortality. Bio-insecticides substantially reduced the mite population density under greenhouse conditions when applied to infested peanut plants, with mite populations reduced 84% and 92% by B. bassiana and M. anisopliae, respectively. Under greenhouse conditions, the increase in the number of mites per plant observed at 15 d after treatment suggests the need to repeat the entomopathogen application. Our results demonstrate that B. bassiana and M. anisopliae are promising biological agents to control T. ogmophallos. The practical application of this work for managing T. ogmophallos population on peanut crop is discussed.
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Database assignments for author(s): Daniel J. Andrade, Ricardo Antonio Polanczyk, Rogerio Teixeira Duarte
Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
evaluation - screening - selection
Pest and/or beneficial records:
| Beneficial | Pest/Disease/Weed | Crop/Product | Country | Quarant.
|
|---|---|---|---|---|
| Tetranychus ogmophallos | Groundnut/peanut (Arachis hypogaea) | Brazil (south) | ||
| Beauveria bassiana (entomopathogen) | Tetranychus ogmophallos | |||
| Metarhizium anisopliae (entomopathogen) | Tetranychus ogmophallos |
