| effects of introduced insects and diseases on forest ecosystems in the catskill mountains of new york. | repeated invasions of non-native insects and pathogens have altered the structure and function of forest ecosystems in the catskill mountains of new york state, and will continue to do so in the future. gypsy moth, beech bark disease, and hemlock woolly adelgid are among the insects and diseases currently established in the catskills that are having significant effects on forests. many others, including emerald ash borer, asian long-horned beetle, phytophthora ramorum, and sirex wood wasp, are e ... | 2013 | 23844706 |