<abstract xmlns="http://www.w3.org/1999/xhtml">

Lambda-cyhalothrin is the most widely used insecticide worldwide. This study investigates the impact of lambda-cyhalothrin on honeybees (<italic>Apis mellifera</italic>) colonies under semi-field and field conditions utilizing the formulated product (Karate 5% at a concentration of 0.85 ml/l). Considering the application of lambda-cyhalothrin in onion fields, the foraging activities reduced by 27.89 and 29.28% under semi-field and field conditions, respectively. The number of dead workers in the comparison group was three-fold higher than that in the control group under both semi-field and field conditions. Under semi-field and field conditions, reductions were observed in the brood (22.6 and 24.01%), pollen (94.46 and 41.51%), and nectar (69.27 and 44.50%) areas. The effect of lambda-cyhalothrin on the strength of <italic>A. mellifera</italic> under semi-field conditions resulted in a significant decrease until the 14th day (2.20 bee frames/hive) and in field condition it was on the 7th day (4.79 bee frames/hive). This highlights the non-bee-safe nature of lambda-cyhalothrin when applied during flowering, and spraying should be avoided to reduce its contamination of nectar and pollen. Overall, our results show the significance of conducting field trials to accurately assess the risk of pesticides, depicting a more realistic exposure scenario under actual colony conditions.
</abstract>

Lambda-cyhalothrin is the most widely used insecticide worldwide. This study investigates the impact of lambda-cyhalothrin on honeybees (Apis mellifera) colonies under semi-field and field conditions utilizing the formulated product (Karate 5% at a concentration of 0.85 ml/l). Considering the application of lambda-cyhalothrin in onion fields, the foraging activities reduced by 27.89 and 29.28% under semi-field and field conditions, respectively. The number of dead workers in the comparison group was three-fold higher than that in the control group under both semi-field and field conditions. Under semi-field and field conditions, reductions were observed in the brood (22.6 and 24.01%), pollen (94.46 and 41.51%), and nectar (69.27 and 44.50%) areas. The effect of lambda-cyhalothrin on the strength of A. mellifera under semi-field conditions resulted in a significant decrease until the 14th day (2.20 bee frames/hive) and in field condition it was on the 7th day (4.79 bee frames/hive). This highlights the non-bee-safe nature of lambda-cyhalothrin when applied during flowering, and spraying should be avoided to reduce its contamination of nectar and pollen. Overall, our results show the significance of conducting field trials to accurately assess the risk of pesticides, depicting a more realistic exposure scenario under actual colony conditions.

Toxicological Impact Of Lambda-Cyhalothrin On <italic>Apis Mellifera</italic>: Comparative Analysis Under Semi-Field And Field Conditions

Entomology, Dr. Y.S Parmar University of Horticulture and Forestry

School of Agriculture, Lovely Professional University

College of Food and Agricultural Sciences, King Saud University

Journal of Apicultural Science

This work is licensed under the Creative Commons Attribution 4.0 International License.

Toxicological Impact Of Lambda-Cyhalothrin On : Comparative Analysis Under Semi-Field And Field Conditions

Lambda-cyhalothrin is the most widely used insecticide worldwide. This study investigates the impact of lambda-cyhalothrin on honeybees (Apis mellifera)...

Toxicological Impact Of Lambda-Cyhalothrin On Apis Mellifera: Comparative Analysis Under Semi-Field And Field Conditions

Published Online: Aug 15, 2024

Page range: -

Received: Dec 17, 2023

Accepted: May 24, 2024

DOI: https://doi.org/10.2478/jas-2024-0007

Keywords
brood area, lambda-cyhalothrin, mortality, toxicity

© 2024 Mohammad Abdul Waseem et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Toxicological Impact Of Lambda-Cyhalothrin On Apis Mellifera: Comparative Analysis Under Semi-Field And Field Conditions

Published Online: Aug 15, 2024

Page range: -

Received: Dec 17, 2023

Accepted: May 24, 2024

DOI: https://doi.org/10.2478/jas-2024-0007

Keywordsbrood area, lambda-cyhalothrin, mortality, toxicity

© 2024 Mohammad Abdul Waseem et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Keywords
brood area, lambda-cyhalothrin, mortality, toxicity