It is exclusively developed for use in ornamental horticulture and highly effective on sucking pests; acting on eggs, larvae and adults. It is best to apply Crown in the spring when plants start new growth and insects begin to emerge.
Crown is designed for quicker and more effective control of sucking insects and fungus gnats. In trials with fungus gnats, Crown exceedingly outperformed other conventional formulations.

Crown is relatively soft on many beneficial insets^ e.g. 300x less toxic via contact and 2000x less toxic via oral than its closest competitor on honey bees*.
^Public Release Summary on ‘Evaluation of the new active Acetemprid in the new product – Supreme 225SL insecticide’. NRA (National Registration Authority-for Agricultural and Veterinary Chemicals) May 2003, p.22
*Beneficial Insets-Nisso Field Trials Presentations, 2005