how do i kill oystershell scale?

my lilac has a massive infestation of oystershell scale. i cut off the worst spots of the plant and sprayed the rest four days ago with horticultural oil. is there any other tips, hints, and tricks for ending this nuisance before i plant the rest of this year's garden?

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  • Anonymous
    1 decade ago
    Favorite Answer

    Your oil spray should knock down the infestation. Oystershell scale and other scale are usually only a problem on woody plants.

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