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		Orchid Board - Most Complete Orchid Forum on the web ! > ORCHID DISCUSSIONS > Pests & Diseases
Black Rot?

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12-04-2014, 07:13 AM

Ray

Senior Member

Join Date: May 2005

Member of:AOS

Location: Oak Island NC

Posts: 15,371

Black Rot?

That's certainly not a calcium deficiency.

Calcium is not translocatable within the plant; once it has been absorbed from the applied solution, it gets "locked" in place. If the calcium supply is deficient, the necrosis is displayed in the newest growth, leaf tips, not bases or in the main part of the structure.

Ray Barkalow
firstrays.com

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Ray Barkalow, Orchid Iconoclast
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Last edited by Ray; 12-04-2014 at 07:15 AM..

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