Effect of fluvalinate on activity of honey bee individuals [electronic resource].

Includes references.

Twenty concentrations of 98% purity ofteehnicalgmde fluvalinate (Apistan) were assayed at 23°C under laboratory and field condition to examine its toxic effect on honey bees (Apis meIJifi!ra L.). In field trial, dilution of 20 mg fluvalinatelml acetone was topically applied to evaluate its effect on queen acceptance, mating ratio, superseding and colony vigor. In the experiment, virgin queens were divided into three different groups of queens treated as follows:- (i) acetone only as untreated check, (ii) 20mg/ml of98% fluvalinate and (iii) queens received treatment only after mating. The data showed that concentrations between 1 -20 mglml fluvalinate caused 10 - 100010 mortality ofworkers, meanwhile, 0.05 - 50 mg/ml caused mortality ofdrones ranging from 11.43-1000/0. Concentrations between 30 - 100 and 20 -80 mglml caused 30 -100 and 20 -100% mortality for queens 24 and 48 hours after treatments, respectively. The LC50,s were 3.768, 4.064 and 53.447 for worker, drone and queen honey bees, respectively. In field trial the queen acceptance was 80, ·70 and 75% and queen mating was 65,60 and 750/0. Queen superceding was 0,40 and 6.67% for groups (i), (ii) and (iii), respectively. Brood areas were 2296.77, 2445.96 and 2447.17 cm² for groups (i), (ii) and (iii), respectively and nwnbers of frames field with brood and those covered with bees were 2.38, 2.63 and 2.56 for the former and 5.00, 5.42 and 5.38 for the later aspect for groups i, ii and iii, respectively.

Summary in Arabic.

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