INVESTIGADORES
STENGLEIN Sebastian Alberto
artículos
Título:
First record of Fusarium verticillioides as an entomopathogenic fungus of grasshoppers
Autor/es:
PELIZZA SA, STENGLEIN SA, CABELLO MN, DINOLFO MI, LANGE CE
Revista:
JOURNAL OF INSECT SCIENCE
Editorial:
UNIV ARIZONA
Referencias:
Año: 2011 vol. 11 p. 1 - 8
ISSN:
1536-2442
Resumen:
Fusarium verticillioides (Sacc.) Nirenberg (Ascomycota: Hypocreales) is the most common fungus reported on infected corn kernels and vegetative tissues, but has not yet been documented as being entomopathogenic for grasshoppers (Orthoptera: Acridoidea). Tropidacris collaris (Acridoidea: Romaleidae) is a large and voracious grasshopper that in recent years has become an increasingly recurrent pest in progressively more greatly extended areas of some of Argentina’s northern provinces with chemical insecticides being currently the only means of control. During February and March of 2008-09, we collected nymphs and adults of T. collaris with sweep nets in dense woodland vegetation at a site near Tres Estacas in western Chaco Province, Argentina. F. verticillioides isolated from infected insects was cultured in PGA medium. Pathogenicity tests were conducted and positive results recorded. In the present work, we report the detection, by traditional and molecular-biological methods, of an isolate of F. verticillioides in T. collaris, and its pathogenecity in the laboratory against another harmful grasshopper, the melanopline Ronderosia bergi (Acridoidea: Acrididae: Melanoplinae). The mortality caused by F. verticillioides on R. bergi reached 58 ± 6.53% by 10 days after inoculation. This is the first record of natural infection caused by F. verticillioides in grasshoppers.