Pollen from genetically engineered papayas has contaminated at least some ordinary papaya plants in Hawaii, say advocates for controls on genetically modified organisms. Evidence of such »genetic drift« with papaya was recently confirmed with testing of Hawaii papaya samples at a mainland lab, representatives of Hawaii Genetic Engineering Action Network and GMO-Free Hawaii said Thursday. Proponents of the genetically engineered Rainbow and SunUp papayas agreed that pollen can spread to nonengineered trees, but said they would need to know more about testing methodologies before agreeing there is a problem.