Given that the distribution of these insects is rarely uniform, some monitoring effort should be directed towards delineating the boundaries of an infestation prior to any chemical application so that treatment can be limited to affected blocks only. Skip to content Ontario. The leaves are reduced to tiny scales at the nodes of the green branchlets. Under normal conditions, populations are sufficiently low, and the damage sufficiently dispersed, that there is little cause for concern. Generally avoid heading-back from the second year, until the trees are in heavy bearing. The risk of winter injury increases if pruning is begun too early.
The leaves are reduced to tiny scales at the nodes of the green branchlets. Used as a general purpose timber and for construction, boat building and flooring. Different species are adapted to a range of light conditions. The tree is also an important source of a copal resin. The use of trade names in this publication is solely for the purpose of providing specific information. Young shoots and fruits of some species are edible. Leaflets large, thin and heart-shaped or broadly ovate; trunk thorny; flowers large, orange or red.