The Toxic Effect of some Bio Insecticides on Honey Bee Foraging Workers | ||
| Journal of Plant Protection and Pathology | ||
| Article 13, Volume 12, Issue 10, October 2021, Pages 753-754 PDF (420.48 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jppp.2021.210238 | ||
| Authors | ||
| Lamiaa L. A. Shehata* 1; R. M. Sheref2; S. l.Y. Khalil2; W. M. H. Desuky1 | ||
| 1Plant Protection Research Institute, Dokki, Giza. | ||
| 2Plant Protection Department, Fac. Agric., Zagazig University | ||
| 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. | ||
| Keywords | ||
| Toxicity; bee worker; bioinsecticides; repellence | ||
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