Winters can be tough on managed honey bee colonies, with beekeepers in the United States reporting that one-third of their colonies die each winter. A new study by Penn State researchers has found that using not one but multiple pest treatments may help bees make it to spring. Winters can be tough on managed honey bee colonies, with beekeepers in the United States reporting that one-third of their colonies die each winter. A new study by Penn State researchers has found that using not one but multiple pest treatments may help bees make it to spring. Ecology Agriculture Phys.org – latest science and technology news stories