Immediately with ArborSystems Wedgle Direct-Inject Tree Injection System. It is a closed system. The self-sealing chemical packs and sealed injection system virtually eliminates exposure concerns. The chemicals are injected directly in the tree, not on the lawn, car or play equipment. Tree professionals have no need for signs telling homeowners to stay off the grass when they use a Wedgle. And once the tree is injected with the chemical, it is done. No waiting for uptake or guarding the tree (or coming back later to collect chemical containers). For more information, click here.