Toxicity to honeybees of water guttation and dew collected from winter rape treated with Nurelle D

• Published in: Plant protection science Vol. 42; no. 1; pp. 9 - 14
• Main Authors: Shawki, M.A.(Zagazig Univ. (Egypt). Plant Protection Dept.) E-mail:shawkimahmoud@yahoo.com, Titera, D.(Vyzkumny Ustav Vcelarsky, Libcice nad Vltavou (Czech Republic)), Kazda, J.(Ceska Zemedelska Univ., Prague (Czech Republic). Fakulta Agrobiologie, Potravinovych a Prirodnich Zdroju), Kohoutkova, J.(Vysoka Skola Chemicko-technologicka, Prague (Czech Republic). Ustav Chemie a Analyzy Potravin), Taborsky, V.(Ceska Zemedelska Univ., Prague (Czech Republic). Fakulta Agrobiologie, Potravinovych a Prirodnich Zdroju)
• Format: Journal Article
• Language: English
• Published: Prague Czech Academy of Agricultural Sciences (CAAS) 01.03.2006; Czech Academy of Agricultural Sciences
• Subjects: ACUTE TOXICITY; ADMINISTRACION ORAL; ADMINISTRATION ORALE; AGUA; ALIMENTACION DE LOS ANIMALES; ALIMENTATION DES ANIMAUX; ANIMAL FEEDING; APIS MELLIFERA; Bees; BRASSICA NAPUS; CHLORPYRIFOS; chlorpyriphos residue; CHRONIC TOXICITY; CIPERMETRIN; CLORPIRIFOS; Contact; CYPERMETHRIN; CYPERMETHRINE; DEW; EAU; ENVENENAMIENTO; FEED INTAKE; Filter paper; Food consumption; INGESTION DE PIENSOS; INSECTICIDAS; INSECTICIDE; INSECTICIDES; INTOXICATION; MORTALIDAD; MORTALITE; MORTALITY; ORAL ADMINISTRATION; POISONING; PRISE ALIMENTAIRE (ANIMAUX); Rape; RESIDU; RESIDUES; RESIDUOS; ROCIO; ROSEE; SUBSTANCE TOXIQUE; SUSTANCIAS TOXICAS; Syrup; Syrups; TOXIC SUBSTANCES; TOXICIDAD AGUDA; TOXICIDAD CRONICA; TOXICITE AIGUE; TOXICITE CHRONIQUE; Toxicity testing; WATER; Water pollution; Water pollution effects; Water treatment; Winter
• ISSN: 1212-2580; 1805-9341
• DOI: 10.17221/2690-PPS

Caged bees were fed on sugar syrup containing water guttation and dew collected from winter rape plants treated with the insecticide Nurelle (chlorpyriphos + cypermethrin) for 24 h (acute toxicity test) and for 10 days (chronic toxicity test). Bee mortality and feed consumption were determined daily. A contact toxicity test was performed within 24 h on bees kept in Petri dishes (10 bees per dish) lined with filter paper saturated with the test solution. The acute Nurelle contact and oral toxicity tests showed that the mortality of bees treated with water guttation and dew did not exceed 10%. A chronic toxicity test showed that adding contaminated water guttation and dew to the syrup caused an insignificant increase in bee mortality and reduced the syrup consumption significantly. The residues of chlorpyriphos and cypermethrin found in the contaminated water were below the limits of detection.