Whitefly Control on Gardenias: Spray Thoroughly or Use Systemic in Spring

Whiteflies explode from hundreds to millions by midsummer. They suck sap, excrete honeydew, grow sooty mold.

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Contact sprays (deltamethrin, permethrin, esfenvalerate): Must coat undersides of leaves. Repeat per label.
Systemic soil drench (imidacloprid/Bayer Advanced Tree & Shrub): Apply in spring. Best results if timed right.

Coverage is everything. Spray up, down, through the canopy. Stay ahead—once they explode, you've lost.

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