geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Virulence of Beauveria bassiana mutants for the pecan weevil


, : Virulence of Beauveria bassiana mutants for the pecan weevil. Journal of Economic Entomology 74(5): 617-621

The virulence of 5 mutant strains of an entomopathogenic fungus, B. bassiana (Bals.) Vuill., which exhibit different capacities for pathogenicity in the corn earworm, Heliothis zea (Boddie), were established for the pecan weevil, C. caryae (Horn). An artificial method of infection on soil surfaces was used that approximates the naturally occurring infective process. The mutants exhibited different degrees of virulence for pecan weevil larvae; no positive and direct correlation to synthesis of specific extracellular enzymes (chitinases, proteinases, lipases) exists. Scanning electron microscopy revealed that penetration of the integument probably does involve extracellular enzymes of B. bassiana. Since the mutants used in this study were previously assayed for virulence against corn earworm larvae, it was possible to compare some aspects of infection in both larval forms. The greatest difference relates to number of conidiospores required to establish an active and terminal infection. Numbers required are greater for the pecan weevil than the corn earworm, and possible reasons for this are discussed. Caprylic acid, a fatty acid found on the surface of corn earworm larvae which inhibits the germination of B. bassiana, was not demonstrated on the surface of pecan weevil larvae.

US$19.90

DOI: 10.1093/jee/74.5.617


Other references

Opthof, Tobias, 1997: Sense and nonsense about the impact factor. The impact factor is based on citations of papers published by a scientific journal. It has been published since 1961 by the Institute for Scientific Information. It may be regarded as an estimate of the citation rate of a journal's papers, a...

Schubert, G., 1960: The so-called optic successive contrast. Albrecht Von Graefe's Archiv für Ophthalmologie 161: 594-598

Andrews, B.S.; Schenk, A.; Barr, R.; Friou, G.; Mirick, G.; Ross, P., 1986: Immunopathology of cutaneous human lupus erythematosus defined by murine monoclonal antibodies. Skin biopsy specimens obtained from involved skin from sixteen patients with systemic and discoid lupus erythematosus were studied. Murine monoclonal antibodies with a biotin-avidin-horseradish peroxidase staining system were used. The findings co...

Nazarko, L., 2005: Winners and losers in agenda for change. Nursing Times 101(32): 16-16

Campo, D.D.; Wolcott, P.A.; Mize, T.I.; Brotman, A.W., 1997: Approaches to psychosocial rehabilitation. Harvard Review of Psychiatry 4(6): 328-333

MacDonald H.; Waite W.P.; Elachi Charles; Borengasser Marcus X.; Tolman D., 1981: Exploration for fractured petroleum reservoirs using radar/ Landsat merge combinations. Pages 312-317 1981

Graddol, D., 2004: The future of language. The world's language system is undergoing rapid change because of demographic trends, new technology, and international communication. These changes will affect both written and spoken communication. English may not be the dominant language o...

Payne, Dl, 1980: An international experience. Extension review United States Department of Agriculture Science and Education Administrationng 51(2): 20-21

Lavilla E.O.; Scrocchi G.J., 1986: Larval morphometry of telmatobiinae anura leptodactylidae from argentina and chile. Morphometric relationships of "lower" Telmatobiinae from Argentina and Chile are shown in a phenogram, made enterely with larval data; morphological data were employed. The clustering of different taxa agrees with current classification...

Pacheco, L.D.; Hankins, G.D.V.; Saad, A.F.; Costantine, M.M.; Chiossi, G.; Saade, G.R., 2017: Tranexamic Acid for the Management of Obstetric Hemorrhage. Obstetric hemorrhage remains the most common cause of maternal mortality worldwide. It is believed that increased fibrinolytic activity, secondary to release and activation of endothelial tissue plasminogen activator, is involved in its pathogenes...