Navigation Links
Fipronil and imidacloprid reduce honeybee mitochondrial activity
Date:8/6/2014

PENSACOLA, Fla. New research published in Environmental Toxicology and Chemistry addresses the effects of two broad-spectrum systemic insecticides, fipornil and imidacloprid, on honeybees. These insecticides are widely used in agriculture, and the authors conclude that fipronil and imidacloprid are inhibitors of mitochondrial bioenergetics, resulting in depleted cell energy. This action can explain the toxicity of these compounds for honeybees.

Scientists are urgently trying to determine the causes of colony collapse disorder and the alarming population declines of honeybees. The cross-pollination services they provide are required by approximately 80 percent of all flowering plants, and 1/3 of all agricultural food production directly depends on bee pollination. As a result, there has been a flurry of research on honeybee parasitic mite infestations, viral diseases, and the direct and indirect impacts of pesticides.

The effects of pyrazoles (e.g., fipronil) and neonicotinoids (e.g., imidacloprid) on the nervous system are fairly well documented. Daniel Nicodemo, professor of ecology and beekeeping at the Universidade Estadual Paulista in Dracena, Brazil, and lead author of the study states, "These insecticides affect the nervous system of pest and beneficial insects, often killing them. Sublethal effects related to insect behavior have been described in other studies; even a few nanograms of active ingredient disturbed the sense of taste, olfactory learning and motor activity of the bees." A key characteristic of colony collapse disorder is the incapacity of the honeybees to return to their hives, and these disruptions have a direct impact on that ability.

In this study, Nicodemo et al. looked at the effects of fipronil and imidacloprid on the bioenergetics functioning of mitochondria isolated from the heads and thoraces of Africanized honeybees. Mitochondria are the power plants of a cell, generating most of a cell's supply of adenosine triphosphate (ATP), used as a source of chemical energy.

Honeybee flight muscles are strongly dependent on high levels of oxygen consumption and energy metabolism. Mitochondrial oxidative phosphorylation drives ATP synthesis, which is required to contract the muscles during flight. "If something goes wrong, the energy production is impaired," explains Nicodemo. "Similar to a plane, honeybees require clean fuel in order to fly." Both fipronil and imidacloprid negatively affected the mitochondrial bioenergetics of the head and thorax of the honeybees. While at sublethal levels, insecticide damage may not be evident, even such low level exposure clearly contributes to the inability of a honeybee to forage and return to the hive, which could result in declining bee populations.


'/>"/>

Contact: Jennifer Lynch
jen.lynch@setac.org
850-469-1500 x109
Society of Environmental Toxicology and Chemistry
Source:Eurekalert

Related medicine news :

1. Production and Market of Imidacloprid in China
2. Community pharmacist intervention boosts drug adherence, reduces health-care costs
3. Diet change -- A solution to reduce water use?
4. 5 Tips for Back-to-School: What You Need to Know to Reduce Stress and Plan for a Healthy Transition from Nina Radcliff, MD
5. Eating resistant starch may help reduce red meat-related colorectal cancer risk
6. Algorithm reduces use of CT scans when diagnosing children with appendicitis
7. Cataract Surgery: New Technology for Reduced Dependence on Glasses
8. New Standing Desk Anti-fatigue Mats from Martinson-Nicholls Reduce Leg Fatigue and Discomfort Working at Standing and Sit-to-Stand Desks
9. Surgical safety program greatly reduces surgical site infections for heart operations
10. Full Explanation Reduces Seniors’ Worries about Lung Cancer Screening
11. Seeing the same GP at every visit will reduce emergency department attendance
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/5/2016)... ... May 05, 2016 , ... In an ... today GrassrootsHealth, a public health promotion and research organization, declared May as “National ... society, and other shifts in cultural behavior over the past several decades, Americans ...
(Date:5/4/2016)... ... May 04, 2016 , ... ProList is a set of ... . With ProList, editors can easily create lists for presentations, youtube productions, and ... bullet points. ProList is the perfect complement to presentation style videos. , ProList ...
(Date:5/4/2016)... (PRWEB) , ... May 04, 2016 , ... ... engineer of patented products, announces the Everlasting Glove, a sports invention that aids ... Athletic and Sporting Goods Manufacturing industry is worth $9 billion," says Scott Cooper, ...
(Date:5/4/2016)... ... May 04, 2016 , ... Cirius, ... patent for its innovative Secure Messaging platform, which includes secure, private messaging, large ... patent extends Cirius’s portfolio of patents around innovative features for securing, tracking, and ...
(Date:5/4/2016)... ... May 04, 2016 , ... Somnoware Healthcare ... today announced it has secured $9 million in Series A funding led by ... investment will be used by Somnoware to further fulfill its mission to connect, ...
Breaking Medicine News(10 mins):
(Date:5/3/2016)... 2016 Research and Markets has ... Cell Therapy Market Outlook 2020" report to their ... , ,Recombinant technology has improved significantly in past years ... developed in coming years. Many cancer drugs have been ... therapies are also expected to be developed with its ...
(Date:5/3/2016)...  While you may be familiar with watching a film or TV show in high definition, ... 8MP in the Medical Industry.  Ampronix  is a renowned authorized reseller of the medical industry,s ... - http://photos.prnewswire.com/prnh/20160502/362730 ... ... ...
(Date:5/3/2016)... , May 3, 2016  Specialty Silicone ... tool that shows how a cleanroom works. The ... discussions about science and technology. ... "As a technology company, SSF enthusiastically supports the ... help educators foster the next generation of innovators. ...
Breaking Medicine Technology: