Entomopathogenic fungi Beauveria bassiana (Bals.-Criv.) Vuill for the biological control of trips (Thysanoptera: Thripidae) in potato crop (Solanum tuberosum L.) in Cuba
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Abstract
In Cuba biopesticides application is one of the diverse tactics of management that are used for the control of Thrips palmi Karny in potato crop (Solanum tuberosum L.). These biopesticides is been of a rigorous selection of strains by means of research that demonstrate the possibility of it use in potato crop. For it and with the objective to evaluate the effect of two strains of the entomopathogenic fungi Beauveria bassiana (Bals.-Criv.) Vuill it has more than enough trips, laboratory experiments and fields were developed. For the experiment in vitro nymphs were selected of first and second instar that later on were inoculated with the strains LBBb - 1234 y LBBb-1, this last one as comparison variant. The inoculation was carried out with 1 suspension ml for each strain to the concentration of 109 conidios • mL-1, as well as a witness tried with sterile water. The evaluations were carried out at 24, 48, 72, 96 and 120 hours, quantifying the alive and dead individuals. The experiment in vivo was carried out at random in field parcels with a block design with three variants, LBBb-1234, LBMa-11 one as comparison variant and a witness without treatment. The laboratory results showed that B. bassiana presented mortality to 24 hours after the treatment. The biggest percentage of mortality reached it the strain LBBb-1234 with a value of 70 % at the 120 hours after the treatment. The field results showed that the population of nymphs decreased after carrying out the second treatment with the biopesticides.
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References
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