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Depression: 21st Century Solutions + The Dark Side of Wheat

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Article Publish Status: FREE
Abstract Title:

A common neonicotinoid pesticide, thiamethoxam, alters honey bee activity, motor functions, and movement to light.

Abstract Source:

Sci Rep. 2017 Nov 9 ;7(1):15132. Epub 2017 Nov 9. PMID: 29123189

Abstract Author(s):

S Tosi, J C Nieh

Article Affiliation:

S Tosi

Abstract:

Honey bees provide key ecosystem services. To pollinate and to sustain the colony, workers must walk, climb, and use phototaxis as they move inside and outside the nest. Phototaxis, orientation to light, is linked to sucrose responsiveness and the transition of work from inside to outside the nest, and is also a key component of division of labour. However, the sublethal effects of pesticides on locomotion and movement to light are relatively poorly understood. Thiamethoxam (TMX) is a common neonicotinoid pesticide that bees can consume in nectar and pollen. We used a vertical arena illuminated from thetop to test the effects of acute and chronic sublethal exposures to TMX. Acute consumption (1.34 ng/bee) impaired locomotion, caused hyperactivity (velocity: +109%; time moving: +44%) shortly after exposure (30 min), and impaired motor functions (falls: +83%; time top: -43%; time bottom: +93%;abnormal behaviours: +138%; inability to ascend: +280%) over a longer period (60 min). A 2-day chronic exposure (field-relevant daily intakes of 1.42-3.48 ng/bee/day) impaired bee ability to ascend. TMX increased movement to light after acute and chronic exposure. Thus, TMX could reduce colonyhealth by harming worker locomotion and, potentially, alter division of labour if bees move outside or remain outdoors.

Study Type : Insect Study
Additional Links
Additional Keywords : Bee Colony Collapse
Problem Substances : Pesticides : CK(827) : AC(95)

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Sayer Ji
Founder of GreenMedInfo.com

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Depression: 21st Century Solutions + The Dark Side of Wheat

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