Agronomy Journal Journal of Natural Resources and Life Sciences Education
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Published online 1 November 1979
Published in Agron J 71:1063-1065 (1979)
© 1979 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Phosphite Injury to Corn1

R. E. Lucas, D. D. Warncke and Virginia A. Thorpe2

A liquid fertilizer containing phosphite was toxic to over 1,000 ha of corn (Zea mays L.) in southern Michigan. The fertilizer contained 9% N, 8% P, and 7.5% K and was applied over the seed at planting time. Toxicity was also obtained when the foliage was sprayed with the same fertilizer. Laboratory tests using paper chromatography and greenhouse trials identified the P source as a phosphite (HPO3)–2. Plants showed white, variegated streaking of the leaves in mild cases and spindly, rolled, yellowish-white leaves in severe toxicity.

Key Words: Toxicity symptoms • Zea mays L.

1 Contribution of Cooperative Extension Service, and Agric. Exp. Stn., Michigan State Univ., East Lansing, MI 48824, and Michigan Dep. of Agric. Journal article No. 8846.

2 Professor emeritus and assistant professor, Crop and Soil Sciences Dep. and chemist, Michigan Dep. of Agric., respectively.

Received for publication January 26, 1979.




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The SCI Journals Crop Science Vadose Zone Journal
Journal of Natural Resources
and Life Sciences Education		 Soil Science Society of America Journal
Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome
Copyright © 1979 by the American Society of Agronomy.