You can cut out that branch and trash it...............you could try when the sun goes down have ready a mix of 1 teasp liquid soap & 1 qt water and spray under & over each.......................if it rains do it again........................if this does not work for you, you could buy sevin and read the directions, wear old long clothing, goggles, gloves, hat and mask and spray on windless day.................read container for next application. Keep children & pets away until it is dry.