Navigation Links
Fewer aphids in organic crop fields
Date:7/13/2011

Farmers who spray insecticides against aphids as a preventative measure only achieve a short-term effect with this method. In the long term, their fields will end up with even more aphids than untreated fields. This has been reported by researchers at the Biocenter of the University of Wrzburg in the scientific journal PLoS One.

What's the status of the biodiversity in differently managed triticale fields? This is what the biologists at the Department of Animal Ecology & Tropical Biology wanted to find out. Triticale is a cross between wheat and rye. The cultivation of this crop is on the rise across the globe, because it delivers good yields even in poor soil conditions.

When comparing conventionally managed crop fields, which were either sprayed with insecticides or were left untreated, Jochen Krauss, Iris Gallenberger and Ingolf Steffan-Dewenter made a discovery, which should catch the attention of every farmer: "According to our results, the preventative application of insecticides against aphids does not produce any advantages even though it consumes a lot of time and money," Jochen Krauss sums up.

The scientists studied five triticale fields that were sprayed with insecticides against aphids, comparing them to ten other fields without any such treatment. "To be sure, the application of the insecticide led to a short-term decrease of the pest density," says Krauss. "After four week's time, however, significantly more aphids could be found in these fields than in insecticide-free fields. This also astonished the farmers who made their fields available for our study."

More aphids as a result of a decrease in natural enemies

The scientists offer two possible explanations for this phenomenon. One possibility is: The insecticides indiscriminately kill off beneficial animals that feed on the aphids, such as ladybugs or the larvae of lacewings and hoverflies. Because their enemies are missing, the aphi
'/>"/>

Contact: Dr. Jochen Krauss
j.krauss@uni-wuerzburg.de
49-093-131-82382
Pensoft Publishers
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Fewer deaths with preventive antibiotic use
2. New MRI technique could mean fewer breast biopsies in high-risk women
3. The EU must allocate fewer emission allowances and stop making free allocations
4. Fewer honey bee colonies and beekeepers throughout Europe
5. Even small dietary reductions in salt could mean fewer heart attacks, strokes and deaths
6. Moa get fewer: Landmark study
7. Fragmented forests result in more snakes, fewer birds
8. Kids now see fewer television ads for sweets and beverages, but more for fast food
9. Rise in new terror groups globally, fewer coordinated attacks, report finds
10. Rapid growth in adolescence leads to fewer offspring, UC Riverside biologists find
11. Vet meds big shift to more women, fewer men driven by falling barriers, more female grads
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Fewer aphids in organic crop fields
(Date:11/12/2014)... GARDENS, Fla. , Nov. 12, 2014 ... announced today that its U.are.U ® fingerprint readers ... bakery chain in Central Mexico . ... June 2014 to eliminate payroll issues caused by employees ... to installing the U.are.U fingerprint readers, Montparnasse relied on ...
(Date:11/7/2014)... 6, 2014 Leading Biometric companies aim ... security revolutionizing online transactions.  Companies in focus today are: NXT-ID, ... BABA ), Google Inc. (NASDAQ: GOOG ... (NASDAQ: EBAY ) and MasterCard Inc. (NYSE: MA) ... NXTDW), a biometric authentication company focused on the growing mobile ...
(Date:11/5/2014)... of biology in the UTSA College of Sciences, ... selected to receive a two-year $300,00 National Science ... (EAGER). The funding supports President Obama,s BRAIN Initiative, ... new technology that will demystify complex brain processes. ... neuroscience are broken into the interactions of multiple ...
Breaking Biology News(10 mins):Montparnasse Pasteleria Achieves Time and Attendance Transparency with Crossmatch U.are.U Fingerprint Readers 2Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 2Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 3Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 4Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 5Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 6UTSA biology professor awarded $300,000 NSF grant for brain research 2UTSA biology professor awarded $300,000 NSF grant for brain research 3
... looked at consumers who buy locally grown and ... programs found the venues largely attract a "privileged" ... a need for broadening local food opportunities beyond ... and strategic efforts that make fresh foods accessible ...
... Primates, brains see the world through triangular grids, according ... journal Nature . Scientists at Yerkes National ... neurons that fire in repeating triangular patterns as the ... monkeys. The finding has implications for understanding how ...
... The ability of embryonic stem cells to differentiate into ... and maintained by a complex series of chemical interactions, ... process could prove useful for stem cell-based therapies down ... Carnegie,s Yixian Zheng zeroes in on the process by ...
Cached Biology News:Greater effort needed to move local, fresh foods beyond 'privileged' consumers 2Primates' brains make visual maps using triangular grids 2Primates' brains make visual maps using triangular grids 3Solving stem cell mysteries 2
(Date:11/26/2014)... Morristown, NJ (PRWEB) November 25, 2014 ... it has officially joined the Morris County (New ... MCCC, which is a leading business organization in ... unique opportunity to further engage some key clients ... have operations in the geographic area. Membership enables ...
(Date:11/26/2014)... Global biostimulants market is expected to ... estimated CAGR of 12.5%. In order to cater ... least ecological impacts, farmers are looking to adopt ... yield more effectively & efficiently. Biostimulants are consequently ... return on investments. , Leading companies in the ...
(Date:11/26/2014)... TOKYO , 25 novembre 2014 Theravalues ... Super sur le marché européen au salon Hi ... Amsterdam ). Curcumine la ... une technologie amorphe (non-cristalline) à des ingrédients approuvés ... est un pigment jaune présent dans la racine ...
(Date:11/24/2014)... -- Five American winners will receive the ... for Medical Sciences", in its 8 th term; ... , on 15 December 2014.      (Photo: ... Center which won the Hamdan Award for Volunteers in ... that aim to improve health and promote peace and ...
Breaking Biology Technology:Whitehouse Laboratories Joins Morris County Chamber of Commerce 2Whitehouse Laboratories Joins Morris County Chamber of Commerce 32019 Biostimulants Market to Grow at a CAGR of 12.5% Says a New Research Report Available at RnRMarketResearch.com 22019 Biostimulants Market to Grow at a CAGR of 12.5% Says a New Research Report Available at RnRMarketResearch.com 32019 Biostimulants Market to Grow at a CAGR of 12.5% Says a New Research Report Available at RnRMarketResearch.com 4La curcumine présentant la plus haute biodisponibilité bientôt en vente en Europe 2La curcumine présentant la plus haute biodisponibilité bientôt en vente en Europe 3Five US Winners Among Recipients of Hamdan Medical Awards 2
... Corporation,(Nasdaq: DNDN ) today announced that it ... 8.0 million shares of its common,stock and warrants ... its common,stock. Net proceeds received by Dendreon were ... sole placement agent for the offering., The ...
... Diffusion,Pharmaceuticals LLC, a clinical-stage drug-development company,commercializing drugs ... enhances,oxygen diffusion, today announced that it has ... Trans Carotenoid Salts and Their Uses." This,patent ... new chemical entities,known as trans biopolar carotenoid ...
... 2008 ShapeGrabber and Nikon,Instruments Inc. today ... as a,sales distribution channel in the United ... scanner inspection systems. This arrangement will,increase ShapeGrabber,s ... enabling Nikon to provide customers with,additional non-contact ...
Cached Biology Technology:Dendreon Announces Closing of Registered Direct Offering 2Diffusion Pharmaceuticals Announces Issuance of U.S. Patent No. 7351844, Titled 'Bipolar Trans Carotenoid Salts and Their Uses,' for Its Family of First-In-Class Molecules 2ShapeGrabber and Nikon Instruments Inc. Announce Distribution Agreement 2
... a Perkin Elmer UltraVIEW system and want to ... and iQ software? No problem. Our experienced ... your existing microscope, lasers, Sutter filter wheel, Piezo ... work with our precision controller unit and workstation... ...
... Variable Speed Rocker, with 12" x 14" table; ... x 14" table; 220V. The VSR-50 Variable ... for any lab. The VSR-50 provides a rhythmic ... a gentle to vigourous movement. This makes it ...
...
...
Biology Products: