GMO COMPASS - Information on genetically modified organisms
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Stakeholder input wanted: survey on research needs for assessing GMO impacts 

Shaping the Future of GMO Research

Stakeholder with interests in the risk and/or benefit assessment of Genetically Modified Organisms (GMO’s) are invited to take part in an online survey.

The aim of this survey is to identify which research needs should be prioritised, thereby contributing to the commissioning of research on the health, environment and economic impacts of GMOs.

The survey will close on 15th July 2015.

More information and access to the online survey

The setting-up of this website was financially supported by the European Union within the European Commission’s Sixth Framework Programme from 1 January 2005 until 28 February 2007.

The European Commission and other EU agencies are not responsible for the content.
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Coexistence in Agriculture

Minimising Pollen Traffic

The goal is simple: Agriculture with and without genetic engineering must coexist side by side. The right measures need to be taken so that GM pollen won't drift into other fields and fertilise conventional cultivars.

Bild vergrößern

Male flower: When July comes around the pollen starts to fly.

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Female flower: Sticky silk catches airborne pollen as it blows by.

Exactly what measures need to be taken for coexistence depends mostly on the reproductive biology of that specific crop.

An example: Maize

In midsummer, maize produces its male flowers (tassels) and releases pollen into the air. The pollen reaches the female flowers (the ears) primarily by wind. Even though bees visit the tassels to collect pollen, they have no interest in the female flowers, and therefore do not play a role in pollination.

With maize, as is the case with many plants, cross-pollination is preferred. Cross-pollination is when pollen from one plant pollinates flowers on a different plant. Each maize plant tends to release its pollen a few days before its own silk becomes receptive, thereby preventing its own self-pollination.

Since maize has no sexually compatible wild relatives in Europe, the only plants that maize could possibly pollinate would be other maize plants.

If GM maize is grown, it is to be expected that cross-pollination with plants in nearby fields will occur. Several research projects have worked on finding out how far maize pollen flies, and how often it fertilises conventional maize in other fields. The test plantings of GM maize conducted in Germany in 2004 looked into these questions. Based on the data from these studies, a set of guidelines was written up that was designed to ensure that coexistence with maize can be achieved.

Codes of practise: Avoiding mixing and crossing

Farmers who grow GM crops need to abide by certain rules and precautions to minimise cross-pollination with neighbouring conventional plants. Appropriate measures include:

  • Allowing for sufficient space between fields
  • Buffer strips of traditional crops surrounding GM plantings
  • Careful cleaning of harvesting equipment
  • Arranging plantings and selecting cultivars so that conventional maize can be harvested first

The effectiveness of these measures depends on several factors, like for example, field sizes, prevailing winds, and other climatic and geographic conditions. The biology of the cultivar being planted also plays a major role in forming management strategies.

At this point, there are no standardised or enforced codes of practice for GM crops. In the future, regulations could make codes of practice legally binding. It is also possible that seed companies come up with their own guidelines and provide them for their customers’ use.


An EU Research Project

What are the risks of growing GM crops?

What are the benefits?

Numerous studies have addressed the potential impacts of genetically modified (GM) plants. Yet the existing evidence on the effects of GM plants is often contradictory and the quality of scientific research varies widely.

Therefore, the GRACE project will establish new tools for assessing the quality of existing studies and will conduct comprehensive reviews to identify health, environmental and socio-economic impacts of GM plants.

More information


GMO Soybeans & Sustainability

Less soil erosion and fuel consumption: herbicide tolerant soybeans are promoting sustainable cultivation methods.


Glyphosate in European agriculture

Interview with a farmer

Glyphosate containing herbicides are not only used in fields with GM crops. They also allow conventional farmers to sow directly into stubble fields without ploughing. Glyphosate has replaced mechanical weed control in many crops and has had an important impact on agricultural practices and crop yields in Europe over the past few decades.

European Glyphosate Task Force

December 21, 2006 [nach oben springen]

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