Problem
Nutritional disorder – molybdenum (Mo) deficiency.
Symptoms
Molybdenum (Mo) deficiency has not been reported under field conditions. Molybdenum deficiencies were induced under controlled greenhouse studies. Symptoms did not develop.
(Descriptions based on the book, Hunger Signs of Crops, 3rd Edition, edited by H.B. Sprague.) Under controlled greenhouse conditions, tobacco plants are slightly stunted when molybdenum is limited. The lower foliage of the plant develops a chlorosis, initially as a pale green, then the spots progress to a necrosis. The leaves may be crinkled and become bent or twisted.
Tobacco production (no symptoms of Mo deficiency).
©2017 Forensic Floriculture/Matthew Vann
Similar Problems
None. Submit a tissue sample for analysis to help diagnose the problem.
Additional Information
Molybdenum is required is very low concentrations, so deficiencies under field conditions is unlikely.
Diagnostic Tips
The sufficiency range for molybdenum is between 0.2 and 1.0 ppm for burley tobacco. No range is provided for flue cured tobacco.
Corrective Measures
Provide molybdenum with your fertilization program.
Management
Provide molybdenum with your fertilization program.
Funding Source
Funding was provided in part by the North Carolina Tobacco Foundation.
Project Team
Josh Henry (NC State M.S. student in Horticultural Science), Paul Cockson (NC State B.S. student in Agroecology), Ingram McCall (Research Technician in Horticultural Science), Rhonda Conlon (Extension IT at NC State), Matthew Vann (Tobacco Extension Specialist, Dept. of Crop and Soil Sciences), and Brian Whipker (Professor of Floriculture and Plant Nutrition in Horticultural Science).
Publication date: Jan. 1, 2017
La universidad N.C. State University y la universidad N.C. A&T State University se comprometen a llevar a cabo acciones positivas para asegurar la igualdad de oportunidades independientemente de la raza, el color de la piel, el credo, el origen nacional, la religión, el sexo, la edad, la condición de veterano de guerra, o la discapacidad de la persona. Además, las dos universidades acogen a toda persona independientemente de su orientación sexual.
The use of brand names in this publication does not imply endorsement by NC State University or N.C. A&T State University of the products or services named nor discrimination against similar products or services not mentioned.
Recommendations for the use of agricultural chemicals are included in this publication as a convenience to the reader. The use of brand names and any mention or listing of commercial products or services in this publication does not imply endorsement by NC State University or N.C. A&T State University nor discrimination against similar products or services not mentioned. Individuals who use agricultural chemicals are responsible for ensuring that the intended use complies with current regulations and conforms to the product label. Be sure to obtain current information about usage regulations and examine a current product label before applying any chemical. For assistance, contact your local N.C. Cooperative Extension county center.
North Carolina State University and North Carolina A&T State University commit themselves to positive action to secure equal opportunity regardless of race, color, creed, national origin, religion, sex, age, veteran status or disability. In addition, the two Universities welcome all persons without regard to sexual orientation.