Tree injection delivery of systemic insecticide for SLF management study:
Directed trunk application has become standard practice for treating trees infested with SLF, and is employed at the Rolling Rock Stone Quarry, 40 Rolling Rock Road, Boyertown, PA in Berks County.
Trial I. Thick barked tree species of the genus Salix appear to be less adapted to accept directed trunk application.
Trial 2. A second trial was attempted on 24th May along a woodland clearing employing a cluster of 9 young (<10 yr. old) Tree of Heaven,