Navigation Links
Common crop pesticides kill honeybee larvae in the hive
Date:1/27/2014

Four pesticides commonly used on crops to kill insects and fungi also kill honeybee larvae within their hives, according to Penn State and University of Florida researchers. The team also found that N-methyl-2-pyrrolidone (NMP) -- an inert, or inactive, chemical commonly used as a pesticide additive -- is highly toxic to honeybee larvae.

"We found that four of the pesticides most commonly found in beehives kill bee larvae," said Jim Frazier, professor of entomology, Penn State. "We also found that the negative effects of these pesticides are sometimes greater when the pesticides occur in combinations within the hive. Since pesticide safety is judged almost entirely on adult honeybee sensitivity to individual pesticides and also does not consider mixtures of pesticides, the risk assessment process that the Environmental Protection Agency uses should be changed."

According to Frazier, the team's previous research demonstrated that forager bees bring back to the hive an average of six different pesticides on the pollen they collect. Nurse bees use this pollen to make beebread, which they then feed to honeybee larvae. To examine the effects of four common pesticides -- fluvalinate, coumaphos, chlorothalonil and chlorpyrifos -- on bee larvae, the researchers reared honeybee larvae in their laboratory. They then applied the pesticides alone and in all combinations to the beebread to determine whether these insecticides and fungicides act alone or in concert to create a toxic environment for honeybee growth and development.

The researchers also investigated the effects of NMP on honeybee larvae by adding seven concentrations of the chemical to a pollen-derived, royal jelly diet. NMP is used to dissolve pesticides into formulations that then allow the active ingredients to spread and penetrate the plant or animal surfaces onto which they are applied. The team fed their treated diet, containing various types and concentrations of chemicals, to the lab
'/>"/>

Contact: Sara LaJeunesse
SDL13@psu.edu
814-863-4325
Penn State
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Commonly used herbicides seen as threat to endangered butterflies
2. Common North American frog identified as carrier of deadly amphibian disease
3. Researchers uncover molecular pathway through which common yeast becomes fungal pathogen
4. New research about facial recognition turns common wisdom on its head
5. Commonly used diabetes drug may help to prevent primary liver cancer
6. Loyola study debunks common myth that urine is sterile
7. Dental X-rays linked to common brain tumor
8. Women & Infants participating in study of treatment of common viral infection in pregnancy
9. Clusters of cooperating tumor-suppressor genes are found in large regions deleted in common cancers
10. Modest alcohol intake associated with less inflammation in patients with common liver disease
11. Sulphur and iron compounds common in old shipwrecks
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Common crop pesticides kill honeybee larvae in the hive
(Date:9/23/2014)... soils store four times more carbon than the ... can have a big effect on atmospheric greenhouse ... Nature Climate Change concludes that climate ... or affect soil carbon storage, despite increases in ... U.S. Forest Service Research Ecologist Dr. Christian Giardina, ...
(Date:9/23/2014)... a cyberwar against cancer finds that the immune system ... research has found that cancer is already adept at ... the interplay between cancer and the immune system to ... said Rice University,s Eshel Ben-Jacob, co-author of a new ... Proceedings of the National Academy of Sciences . ...
(Date:9/23/2014)... is essential in the development of animals and plants. ... genetic information be translated in a reliable manner to ... The French-flag model of stripe formation is a classic ... different colours of the French flag, is caused by ... high, middle or low concentrations of the morphogen a ...
Breaking Biology News(10 mins):Study helps assess impact of temperature on belowground soil decomposition 2Immune system is key ally in cyberwar against cancer 2Immune system is key ally in cyberwar against cancer 3Recreating the stripe patterns found in animals by engineering synthetic gene networks 2
... patient, according to a study recently published in PLoS ... and includes bacteria common in the environment, some of ... "This is the first reported case of invasive human ... the article. , The new bacterium ...
... derived human gene trees by Alan R. Templeton, Ph.D, ... major waves of human migration out of Africa instead ... 'Out of Africa' replacement theory. , That theory holds ... ago and wiped out existing populations of humans. ...
... that normally develops when a mouse repeatedly experiences defeat ... gene for a memory molecule in a brain circuit ... of Health's (NIH) National Institute of Mental Health (NIMH) ... molecule continued to welcome strangers in spite of repeated ...
Cached Biology News:Scientists discover a new disease-causing bacterium in an immune-compromised patient 2New analysis shows three human migrations out of Africa 2Mice lacking social memory molecule take bullying in stride 2Mice lacking social memory molecule take bullying in stride 3
(Date:9/23/2014)... Cambridge Semantics, the leading provider of Smart ... in the recent ‘Hype Cycle for Life Sciences 2014 ... details key insights pertaining to the benefits in the ... Michael Shanler and Stephen Davies, “The use of these ... with scientific stakeholders, and support collaboration and innovation strategies ...
(Date:9/23/2014)... 23, 2014 Dr. Williams says, “Find ... on healthcare offers a three phase process that can ... delivery system that would go far beyond anything previously ... the delivery of healthcare.” , “Every effort to improve ... to provide discernable progress throughout that system because all ...
(Date:9/22/2014)... September 22, 2014 Pearl's Premium Ultra ... in drought tolerant grass seed this week with the ... The announcement coincides with the fact that it is ... as many believe. , As of the date ... favorable reviews by industry experts and the media including: ...
(Date:9/22/2014)... in a mouse model of pancreatic cancer identified distinct ... including significant differences from the primary tumor that may ... their study reported in the Sept. 25 issue of ... Hospital (MGH) Cancer Center identified several different classes of ... to be targets for improved treatment of the deadly ...
Breaking Biology Technology:Cambridge Semantics Identified in Gartner’s ‘Hype Cycle for Life Sciences 2014’ Report 2Dr. Ira Williams Offers the Healthcare Solution Necessary for Patient Safety Improvement 2Pearl's Premium Ultra Low Maintenance Lawn Seed Announces A Major Breakthrough In Drought Tolerant Grass Seed 2Massachusetts General study reveals gene expression patterns in pancreatic CTCs 2Massachusetts General study reveals gene expression patterns in pancreatic CTCs 3
... the World,s 3rd Largest Biotech Cluster By ... Developing more than 175 Local Companies, SAN ... 30th Anniversary Reunion for Hybritech employees will,take place on Saturday, ... Diego., In September 1978 Hybritech, San Diego,s "Granddaddy" biotech ...
... Inc., (TSX: IXS.V, OTC Bulletin Board: IXSBF, http://www.ixsbio.com ... of monoclonal antibodies based on its Dynamic Cross ... of Directors., Mr. Warden was a founding ... 23 years of practice, he has represented both ...
... Inc. (OTC Bulletin Board: CHBT) (,China-Biotics," "the,Company"), ... manufacture,research, development, marketing and distribution of probiotics ... equipment for its new manufacturing,facility., The ... is,located in Qing Pu Industrial Park (the ...
Cached Biology Technology:San Diego's Original Biotech Company Celebrates 30th Anniversary With Reunion 2InNexus Biotechnology Strengthens Patent Team With New Leadership 2China-Biotics, Inc. Provides Update on Construction of New Manufacturing Facility 2