Evaluación de cepas nativas de Bacillus thuringiensis berliner para el control de Heliothis virescens fabricius en el cultivo del tabaco en Cuba
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Abstract
Liquid culture of eight Bacillus thuringiensis strains were evaluated on second instar larvae of Heliothis virescens Fabricius. LBT-111 strain showed 50% of mortality the second day of experiment. A second bioassay with this strain allowed to determinate the CL50 against Heliothis virescens, which was 2.6 x 107 spores/mL–1 and the highest correlation (0.95) was obtained with the data of 48 h. The confidence limits (p 0.05) in the dosis-probit correlation line showed narrow margins with the data of 48 h, which indicate the accuracy in the calculation of the CL50.
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References
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