Resumen

BARRERA SANCHEZ, Oscar Daniel; CALYECAC CORTERO, Gloria Humberta; CASTREJON GOMEZ, Víctor Rogelio  y  CUEVAS SANCHEZ, Jesús Axayacatl. Biological control of leaf-footed bug in purging nut under laboratory conditions. Rev. Mex. Cienc. Agríc [online]. 2016, vol.7, n.8, pp.1973-1983. ISSN 2007-0934.

Jatropha curcas L. commonly known as purging nut, is often used to produce biodiesel using oil extracted from its seeds, in Mexico, in Totonacapan these (toasted), have been used as human food, making clear its domestication and anthropocentric importance. However, currently this species faces the incidence of various pests, highlighting the leaf-footed bug, Leptoglossus zonatus (Dallas). The incidence of this insect reduces seed yield up to 21%. The use of entomopathogenic fungi can be a viable alternative as biological control. This study aimed to evaluate the pathogenicity and virulence of three Beavueria bassiana (Bals.) strains on adults of this species under laboratory conditions. The BB01 strain isolated from Melanoplus spp., recorded a mortality rate of 85.7% in the first assay and 100% in the second bioassay, strain that was extracted from L. zonatus. The 50 lethal dose (LD50) was 5.2 x 107 conidia ml-1 and lethal time 50 (LT50) was 5.9 days. For mean comparison, the Tukey tests (α= 0.05) and LSD (α= 0.06) were used in the first and second assay respectively. Probit analysis was used for variables LD50 and LT50 using S.A.S version 9.0, concluding that this strain showed greater potential to be used in field conditions as a control agent for the pest.

Palabras llave : Leptoglossus zonatus (Dallas); Beauveria bassiana (Bals.); Jatropha curcas L.; biological control.

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