Lilac borers known as borers, are pests that can destroy your trees. Immature lilac borer larvae burrow into the stems of the tree that is lilac and feed the substances inside. As time passes, the lilac borers will bore holes in the branches of the tree. It is going to die once the pests bore holes on your tree. Borers are common in the Central Valley of California, but can infest trees throughout the state. If you notice lilac borers taking up residence on your tree, take action immediately to protect your plant’s health.
Cut off some branches with gardening shears. Wear gloves to protect your hands.
Place borer pheromone traps round the trees in May or April. Follow the package directions for proper placement. Borer pheromone traps catch any man borers present in your shrub, which can help prevent any larvae according to the Iowa State University Extension.
An insecticide designed to destroy borers on the trunk of the lilac tree. Because insecticides don’t kill borers apply the item 10 days once you catch the borers in the pheromone traps.
Future infestations by flushing it well during warm spells and by applying a layer of mulch. Protecting your tree out of damage can help safeguard your lilacs.