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Oystershell Scale on Zelkova and Maple: Winter Oil Spray

Scale insects suck sap; eggs under dead female shells. Scrub gently with plastic scrubber. Better: spray entire tree in winter with horticultural oil (SunSpray). Repeat in April and May when crawlers emerge.

oystershell scale

About Gardening: Scale Insects on Ivy and Spider Plants: Thorough Spray Treatment; Scale and Ants on Houseplants: Soap Alone Isn’t Enough; Butterfly Identification and Host Plants: Your Georgia Guide; Virginia Copperleaf Identification and Control Strategies; Crabgrass Identification and Prevention in Bermuda Lawns; Princess Tree (Paulownia): Invasive Identification and Stump Treatment; Squash Bugs: Copper Eggs = Act Now, Smash or Spray, Rotate Crops; Ragweed: The Real Allergy Culprit; Henbit vs. Purple Deadnettle: ID and Control; Mistletoe Control: Understanding Ethephon Treatment and Limitations

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