Molecular and biological characterization of native Bacillus thuringiensis strains for controlling tomato leafminer (Tuta absoluta Meyrick) (Lepidoptera: Gelechiidae) in Colombia

2010 ◽  
Vol 27 (3) ◽  
pp. 579-590 ◽  
Author(s):  
J. Hernández-Fernández ◽  
L. Ramírez ◽  
N. Ramírez ◽  
L. S. Fuentes ◽  
J. Jiménez
Keyword(s):  
Bacillus Thuringiensis ◽  
Tuta Absoluta ◽  
Biological Characterization ◽  
Tomato Leafminer

Biological characterization of two Bacillus thuringiensis strains toxic against Spodoptera frugiperda

2011 ◽  
Vol 27 (10) ◽  
pp. 2343-2349
Author(s):  
Analía Alvarez ◽  
Eduardo G. Virla ◽  
Licia M. Pera ◽  
Mario D. Baigorí
Keyword(s):  
Bacillus Thuringiensis ◽  
Spodoptera Frugiperda ◽  
Biological Characterization

scholarly journals Efficacy of a Beauveria bassiana strain, Bacillus thuringiensis and their combination against the tomato leafminer Tuta absoluta

2017 ◽  
Vol 25 (2) ◽  
pp. 23 ◽  
Author(s):  
Despoina Tsoulnara ◽  
Gordon Port
Keyword(s):  
Bacillus Thuringiensis ◽  
Synergistic Effect ◽  
Beauveria Bassiana ◽  
Larval Mortality ◽  
Tuta Absoluta ◽  
Recommended Dose ◽  
Tomato Leafminer ◽  
Single Leaf ◽  
Combined Use ◽  
Good Potential

A single leaf bioassay was developed to investigate the entomopathogenic efficacy of a Beauveria bassiana strain, Bacillus thuringiensis (Costar®) and their interactions on larval mortality of Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae). Tomato leaves were removed from the plants and sprayed with manufacturers’ highest field recommended concentrations for tomato crops before or after infesting the leaves with the larvae. Third instar larvae proved the most susceptible, while susceptibility was lower in the second instar larvae. The combined use showed a higher potential indicating a positive synergistic effect. In addition, treated leaves were sprayed directly with concentrations of 0.0, 0.05, 0.10, 0.15 and 0.20 mL/L of B. bassiana. The efficacy was higher for the tested concentration of 0.20 mL/L that is higher than the recommended dose. The present study suggests that those bioinsecticides have a good potential in the control of T. absoluta.

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