http://www.staugorch...vironmental.htm
Orchid Pests and Diseases, Environmental Effects, Other Orchid Damage, Identific...ation, Prevention, Edema, Calcium Deficiency, Magnesium Deficiency, Orchids and Ferns Do Not Mix, Cold, Cold Water Damage, Sunburn, Fertilizer Burn, Salt Toxicity, Bud Blast