Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Pest control breakthrough - from a spider’s stomach

15.12.2003


UK Team is first to use DNA-based techniques to analyse content of spiders’ guts to identify prey



DNA found in a spider’s stomach could herald a breakthrough in the fight against farm pests, which cause millions of dollars of damage to crops.

Cardiff University, UK, scientists, led by Dr Bill Symondson in the School of Biosciences, have become the first to use DNA-based techniques to analyse the content of spiders’ guts to identify the prey they have eaten in the field.


Money spiders – or Linyphiidae - are a vital controller of pest numbers on farms because their prey includes aphids. However, aphids have poor nutritional value and are sometimes toxic, so the spiders need to balance their diet with other prey.

In a field experiment, the Cardiff team’s analysis showed that the money spiders were eating large numbers of small insects called springtails or Collembola. Stomach contents showed that they were eating several different species of Collembola, but with strong preferences – DNA from a species, which was uncommon at the site where they were collected, proved to be present most frequently in the stomachs of the spiders.

"The DNA analysis enables us to identify precisely what the spiders have eaten," said Dr Symondson. "If we compare that with the prey populations in the field, we can see which prey the spiders prefer to eat when they have a choice."

"If we can encourage this prey insect in greater numbers, it should boost the population of spiders and therefore provide better control of aphids," said Dr Symondson.

Spiders, and in particular money spiders, are extremely important in the control of pests in arable crops, and their webs often cover more than 50% of the fields they inhabit.

However, the team is also using the techniques they have developed to analyse other important predators, such as the ground beetle, whose prey include slugs – the most damaging of crop pests in Europe.

"Many people are surprised at how important such natural predators are in the control of pests," said Dr Symondson. "Even on a conventional farm, which uses chemical pesticides, most pests are controlled by predators most of the time.

"Regulations are placing increasing limitations on the use of chemicals, so encouraging natural predators is going to become even more important."

Dr. Bill Symondson | EurekAlert!
Further information:
http://www.cardiff.ac.uk/

More articles from Agricultural and Forestry Science:

nachricht Raiding the rape field
23.05.2018 | Julius-Maximilians-Universität Würzburg

nachricht New technique reveals details of forest fire recovery
17.05.2018 | DOE/Brookhaven National Laboratory

All articles from Agricultural and Forestry Science >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Powerful IT security for the car of the future – research alliance develops new approaches

The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.

Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...

Im Focus: Molecular switch will facilitate the development of pioneering electro-optical devices

A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.

The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

In focus: Climate adapted plants

25.05.2018 | Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

 
Latest News

In focus: Climate adapted plants

25.05.2018 | Event News

Flow probes from the 3D printer

25.05.2018 | Machine Engineering

Less is more? Gene switch for healthy aging found

25.05.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>