At Brighton, WWW meant worlds worst weeds, not world-wide web. Top of the pops, judged by the number of scientific papers published on each weed in the past twenty-eight years, is Bermuda grass, closely followed by watergrass or nutgrass. Blackgrass doesnt even make the top 20. "It would be right up there if the chart was based on agchem research spend," said Martin Parham, of Berks-based Herbiseed, who put together a display of the top 20 for the event. Of the common UK weeds only fat-hen, wild oats, field bindweed and amaranthus made the WWW list.