Abstract
Insecticides were applied to nursery stock (canary island pine, Oriental arborvitae, Chinese elm, Indian laurel, Japanese pittosporum, firethorn, burford holly, Japanese spindle tree, Japanese privet, crape-myrtle, and oleander) to evaluate for phytotoxicity. The insecticides utilized were: acephate, aldicarb, chlorpyrifos, fenvalerate, methidathion, methomyl, oxamyl, and pirimicarb. Three applications were made at 4-wk intervals during the winter and summer and at 2-wk intervals during the fall. Insecticides were applied at the 1X (recommended), 2X, and 4X rates. No phytotoxicity resulted from 1X treatment rates but was observed at higher rates. Severe damage occurred on Nerium oleander L. treated with chlorpyrifos at the highest rate.
Published Version
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