INVESTIGADORES
STENGLEIN Sebastian Alberto
artículos
Título:
Virulence and enzymatic activity of three new isolates of Beauveria bassiana (Ascomycota: Hypocreales) from the South American locust Schistocerca cancellata (Orthoptera: Acrididae)
Autor/es:
PELIZZA S.; MEDINA H.; FERRERI N.; ELIADES L.; POCCO M.; STENGLEIN S.A.; LANGE C.
Revista:
JOURNAL OF KING SAUD UNIVERSITY-SCIENCE
Editorial:
Elsevier
Referencias:
Año: 2020 vol. 32 p. 44 - 47
ISSN:
1018-3647
Resumen:
Schistocerca cancellata is a large-sized acridid, which has historically represented the greatest agriculturalproblem in southern South America, causing serious economic losses. Since 2015 S. cancellata entered in astate of outbreak condition of historical proportions, producing frequent and large swarms of up to 25km2 inthe north and central region of Argentina and areas of neigh boring Bolivia and Paraguay. At present, chemicalinsecticides are still the only means available for the control of S. cancellata. We analyzed under laboratoryconditions the effectiveness of three fungal strains of Beauveria bassiana isolated from S. cancellataand also determined the relationship between chitinase, protease, and lipase levels at different temperatures ofthese fungi and their insecticidal activities. The pathogenicity assays were carried out by the sprayed methodwith concentrations of 1×104, 1×106 and 1×108 conidia/ml. We observed that isolate LPSc 1227 caused thehighest mortality at each dose studied, ranging from 100% at a dose of 1×108 conidia/ml to 33.3±3.2% at thelowest dose of 1×104 conidia/ml. Moreover, in this isolate the highest values of chitinolytic and proteolyticactivity were recorded (2.31±0.31 and 1.78±0.04), respectively.