The Toxic Effect of some Bio Insecticides on Honey Bee Foraging Workers

Shehata, Lamiaa L. A.; Sheref, R. M.; Khalil, S. L.Y.; Desuky, W. M. H.

doi:10.21608/jppp.2021.210238

The Toxic Effect of some Bio Insecticides on Honey Bee Foraging Workers

Document Type : Original Article

Authors

¹ Plant Protection Research Institute, Dokki, Giza.

² Plant Protection Department, Fac. Agric., Zagazig University

10.21608/jppp.2021.210238

Abstract

Honeybee foraging workers were exposed orally and by contact to the insecticides : chlorpyrifos, alpha- cypermethrin, spinosad, B.t and orange oil to evaluate the toxic effect of these insecticides under laboratory conditions. Oral toxicity tests of the tested insecticides to honeybee foragers, indicated that the LC₅₀ of chlorpyrifos, alpha- cypermethrin and spinosad recorded 48.0 , 47.0, 45.0 ppm, respectively. Also it cleared that chlorpyrifos value was the height toxicity on honeybee foragers and recorded 96% mortality percentage- but on the other hand orange oil was the lower compound that recorded 25.00ppm and 50% mortality percentage on honeybee foragers at LC₅₀ level. As for direct contact toxicity tests, the bees mortality was recorded as well as the mortality lines was illustrated, data cleared that the LC₅₀ of chlorpyrifos, alpha- cypermethrin and spinosad 25.0, 20.0, 14.0 ppm, respectively. While orange oil treatment recorded the lowest LC₅₀ as 2.0 ppm. In addition , as for the mortality percentages, chlorpyrifos recorded 50% occupied the most toxic insecticides on honeybee foragers while orange oil was the lowest recording only 4% mortality percentage. Regarding to the Initial repellence the result indicated that all tested compounds recorded high repellent during the first and second days through the treatments.

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