Image Number: 1402096

Calcium (Ca)deficiency seldom occurs under field conditions, but some varieties cannot supply sufficient Ca to buds and young leaves during periods of rapid growth even though soil Ca is adequate for normal growth of other varieties. Initially, Ca deficient buds are twisted with downward curling of leaf margins and downward hooking of leaf tips. As leaf expansion continues, these symptoms become more pronounced, with separations of margin tissue which give the leaf a scalloped appearance. Tip and margin tissues become chlorotic and tips cease growing, giving the leaf a stubby appearance. Ca deficient leaves are thicker and sometimes greener than normal leaves. Symptoms become progressively less pronounced on older leaves and seldom occur at the lower stalk positions.
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United States


Kingdom: Other damage agents
Phylum: Other damage agents
Class: Other damage agents
Order: Abiotic
Family: Nutrient deficiency
Subject: calcium deficiency


Kingdom: Plantae
Phylum: Magnoliophyta
Class: Magnoliopsida
Subclass: Asteridae
Order: Solanales
Family: Solanaceae
Genus: Nicotiana
Subject: Nicotiana tabacum (flue-cured type) L.
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Image uploaded:
Sunday, March 10, 2002
Image last updated:
Friday, December 10, 2010