Worried about bedbugs? Maybe you should be more concerned about the insecticides used to get rid of them. A government study counted one death and 80 illnesses linked to bedbug insecticides over three years. Many were do-it-yourselfers who misused the chemicals or used the wrong product. And most of the cases were in New York City. The study released Thursday by the Centers for Disease Control and Prevention is the first to look at the issue.