ARBORICULTURE
Prioritization of trees really helps when it comes to the health of the turf , budget efficiency and liability reduction . Photos by James Kalisch , UNL
The frequency of occupation , or the amount of time that a particular target is exposed to a potentially troublesome tree is also a factor . For example , a parking lot where constant occupation is the norm — such as a dormitory or library — is more of a concern than lots that are used less frequently .
TREE PESTS THAT AREN ’ T ( A . K . A ., LOOK-A-LIKES ) One important benefit of getting to know the very damaging and less damaging pests is also to learn about those that are actually beneficial or simply benign . These are called “ mimics ” or “ look-a-likes .” They range from interesting features such flaky bark and falling needles to predatory insects that look like something that is or could be harmful . Specific examples include older needles of pines that naturally fall off after a few years of growth and exfoliating bark of Kentucky coffeetree — which cause no trouble and are simply interesting — along with ladybird beetles and lacewings that feed on harmful insects .
NATURALLY TROUBLE-FREE PESTS Some tree species just don ’ t have as many pest problems as others . In terms of control , it makes good sense to choose these whenever possible . Avoiding the cost of applying a fungicide or insecticide is a big benefit in terms of the overall budget . When replacing trees and shrubs , consider native choices and species well adapted to the region . Consult with local arboreta and botanic gardens for assistance ; most have an information center and brochures with lists of great plants for the area .
IMPLEMENTING CONTROL MEASURES If scouting , monitoring , record keeping , prioritization and consideration of targets lead you toward implementing a control measure , consider both cultural and chemical approaches . Good cultural practices — such as watering according to the tree ’ s needs , placement of wood chip mulch over the roots , protection of the bark during establishment and judicious structural pruning — go a long way toward
22 SportsField Management | January 2024 sportsfieldmanagementonline . com