Sucasas da Costa

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Sublethal exposure of Colorado potato beetle, Leptinotarsa decemlineata (Say), larvae to the delta-endotoxin of Bacillus thuringiensis variety tenebrionis (Berliner) caused a dose-dependent reduction in feeding and weight gain when tested in a leaf disk bioassay. The highest doses of chronic (continuous-lower concentration) exposure resulted in peak foliage(More)
Acute or chronic sublethal exposure of Colorado potato beetle larvae to the CryIIIA delta-endotoxin of Bacillus thuringiensis Berliner did not significantly (P > 0.05) alter their subsequent susceptibility to Beauveria bassiana (Balsamo) Vuillemin. During the period of exposure to B. bassiana there was continued mortality from previous exposure to(More)
Correspondence to: Luciane Ribeiro de Rezende Sucasas da Costa Rua J-34, Qd. 60, Lt.12, Setor Jao, Goiânia-GO, Brazil, 74673-520 Phone.: +55 62 32044075 Fax: +55 62 32044075 E-mail: Abstract The antimicrobial activity of propolis extracts is well documented, but little is known about the antimicrobial properties of commercial products(More)
Colorado potato beetle, Leptinotarsa decemlineata (Say), feeding, development, and survival to adulthood were examined after continuously exposing large larvae to Bacillus thuringiensis subsp. tenebrionis-treated potato foliage from the field. In laboratory assays, the overall consumption and the length of period to become prepupae were determined for(More)
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