SPRAYING OYSTERSHELL WHEN TEMPERATURES GO BELOW FREEZING AT NIGHT

Our cotoneasters look as if they could burst into leaf very soon. However, at night the temperature is falling 3 or 4 degrees below freezing. Should I treat against oystershell now? Or would it be advisable to wait until there is no risk of frost at night? I look forward to hearing from you. Thank you very much.

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1 Comment To "SPRAYING OYSTERSHELL WHEN TEMPERATURES GO BELOW FREEZING AT NIGHT"

#1 Comment By GKH_Susan On 04/11/2022 @ 2:12 am

You can apply horticultural oil before bud break in spring to suppress any existing scale. The temperature shouldn't make a difference.

https://hortnews.extension.iastate.edu/oystershell-scale ^[1]

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[1] https://hortnews.extension.iastate.edu/oystershell-scale: https://hortnews.extension.iastate.edu/oystershell-scale

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