Abstract

SANCHEZ, Lourdes  and  RODRIGUEZ, MayraG. POTENCIALITIES OF Heterorhabditis bacteriophora Poinar strain HC1 FOR THE MANAGEMENT OF Hypothenemus hampei Ferr. II. COMPATIBILITY WITH Beauveria bassiana (Balsamo ) Vuillemin and endosulfan . Rev. Protección Veg. [online]. 2008, vol.23, n.2, pp. 104-111. ISSN 2224-4697.

The strain HC1 belonging to Heterorhabditis bacteriophora has shown to be an effective biological control agent for important pests in Cuba, showing also potentialities for coffee berry borer (CBB) management. The objective of this work was to study the relationship between this organism and Beauveria bassiana , fungi with high use at international scale for CBB under field conditions and with the Thiodan , pesticide for this purpose. The strain HC1 of H. bacteriophora showed a synergic and additive effect, with a 62% mortality in the treatment with two biocontrol organisms. In the Petri dish viability assay, using infective juveniles of nematodes (HC1) and Endosulfan (Thiodan ), the 97-98% of juveniles survived during almost 36h in pesticide solution, with similar values to distilled water. The pesticide neither affected the nematode pathogenicity , which caused a 100% mortality in Corcyra cephalonica larvae and Ips sp. adults, independently the exposition time to the pesticide. The assays carried out in this work confirm the possibility to use H. bacteriophora HC1 and Thiodan in simultaneous applications, as well as the use of HC1 - B. bassiana, element of great importance for the management of this pest in coffee agroecosystems , since in the case of having high insect densities, they can be applied together.

Keywords : entomopathogenic nematodes; Heterorhabditis bacteriophora; Hypothenemus hampei; coffee berry borer; Beauvera bassiana; Endosulfan.

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