|
The plant had been modified to be herbicide-tolerant, and was being grown to assess its environmental impact.
The research is being carried out by independent scientists from the Institute of Arable Crops Research.
The trials are providing "vital research", according to Dr John Pigdeon from the institute. He said the results could answer some of the questions in the current debate about GM crops.
![[ image: width=150]](/olmedia/405000/images/_406897_field150.jpg)
But Dr Pidgeon said the implication from the crop protests is that there are "some people who want to stop the study and deny the public important information on the issue".
Farmer Robert Hambridge, who owns the field, told the BBC that protesters had "spoiled a very useful trial".
"It wasn't set up for commercial purposes - it was for the environment, to see the effect of GM crops," he said.
Mr Hambridge said pollen from flowering sugar-beet plants would not have been a problem, as it flowers bi-annually, and is not due to flower this year.
Environmental protesters have expressed concern that GM pollen will spread to nearby crops and contaminate them.
Mr Hambridge also expressed concern that addresses of farms taking part in the trials are available on the Internet, but said they would be continuing.
Previous crop damage
There are about 50 small-scale trials taking place around East Anglia, and the scientist says some of them have suffered similar attacks.
Earlier this week, 28 Greenpeace demonstrators were charged after GM maize was damaged at Lyng, also in Norfolk.
But Greenpeace chief Lord Melchett, who was among those arrested, said he did not regret being arrested and held in custody over his protest. He also said the pressure group had nothing to do with the crops destroyed on Wednesday.
![[ image: width=150]](/olmedia/400000/images/_404318_melchett150.jpg)
He said he believed a lot of people supported his action in trying to stop "a very serious threat to the environment".
The second attack highlights scientists' concerns that the remaining trial sites will be targeted by protesters, threatening the outcome of the test results. Security at four of the original test sites was considerably increased earlier in this week.
So far the data has not been affected, and Dr Les Firbank, of the Institute for Terrestrial Ecology, in Cumbria, told BBC News Online that data from the damaged sites could still be collected.
His main concern was for the farmers, who he said had suffered "intimidation from protesters, which is totally unacceptable".
Lord Melchett: Aristocrat eco-warrior
(27 Jul 99 | UK)
No regrets over GM protest - Melchett
(29 Jul 99 | UK)
GM crops get police protection
(28 Jul 99 | UK)
Organic picnic slams GM food
(25 Jul 99 | UK)
Friends of the Earth: List of GM test sites
Greenpeace
Commercial use of GM crops (Department of the Environment)
AgrEvo
The BBC is not responsible for the content of external internet sites.
Next steps for peace
Blairs' surprise over baby
Bowled over by Lord's
Beef row 'compromise' under fire
Hamilton 'would sell mother'
Industry misses new trains target
Quins fightback shocks Cardiff
(From Sport)
Vodafone takeover battle heats up
(From Business)
IRA ceasefire challenge rejected
Thousands celebrate Asian culture
Christie could get two-year ban
(From Sport)
Colleagues remember Compo
(From Entertainment)
Mother pleads for baby's return
Toys withdrawn in E.coli health scare
Nurses role set to expand
(From Health)
Israeli PM's plane in accident
More lottery cash for grassroots
Pro-lifers plan shock launch
Double killer gets life
Cold 'cure' comes one step closer
(From Health)
Straw on trial over jury reform
(From UK Politics)
Tatchell calls for rights probe into Mugabe
Ex-spy stays out in the cold
Blair warns Livingstone
(From UK Politics)
Smear equipment `misses cancers'
(From Health)
Boyzone star gets in Christmas spirit
(From Entertainment)
Fake bubbly warning
Murder jury hears dead girl's diary
Germ warfare fiasco revealed
(From UK Politics)
Blair babe triggers tabloid frenzy
Tourists shot by mistake
A new look for News Online