Symptoms of Molybdenum Deficiency in Tobacco

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Abstract
Symptoms of Mo deficiency were produced in Connecticut Broadleaf Tobacco grown in water-cultures purified with the calcium carbonate and the 8-hydroxyquinoline methods. The 1st symptoms of deficiency were a savoying and mottling of midleaves after 24 days. Bending and twisting of leaf lamina were also evident and were followed by the appearance of small interveinal, light tan necrotic areas that gradually enlarged until the entire leaf was withered. Blossoming was delayed slightly. Cauliflower showed extreme symptoms of Mo deficiency under similar conditions. Leaves of control plants of tobacco contained 6.4 ppm. and those of deficient plants 0.3 ppm. Mo.

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