Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 20:235-239 (1980)
© 1980 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Influence of Mechanical Damage and Fungicide Seed Treatments on Germination and Stand with Cottonseed1

Janet A. Green and Earl B. Minton2

Mechanical damage to the seed coat of cotton (Gossypium hirsutum L.) seeds may occur during harvesting, ginning, and processing. The extent of damage vanes considerably among seed lots and it is impossible to remove all damaged seed while processing seed for planting. Fungicide-treated and non-treated seed with damaged seed coats germinate slower and produce poorer stands than seed with nondamaged seed coats. The percentage germination at standard temperatures in the laboratory and the stands and seedling growth in the greenhouse were inversely related to the extent of damage to the seed coat of acid-delinted cottonseed. Scratches or cracks in the seed coats that did not expose the embryonic tissues adversely affected germination and stand less than did damage that exposed the embryonic tissues. Coating cottonseed with fungicides improved the performance of all seed classes, but the most improvement was obtained from seed with a damaged seed coat. However, no fungicide treatment completely compensated for the damage to the seed coat.

Key Words: Seedling weight • Seedling disease • Seed protectants • Gossypium hirsutum L.

1 Contribution from the Cotton Res. Lab., USDA, SEA, AR, in cooperation with the Texas Agric. Exp. Stn., Lubbock, TX 79401.

2 Biological laboratory technician and research plant pathologist. Present address of second author is USDA, SEA, AR, Cotton Physiology and Genetics Lab., Stoneville, MS 38776.

Received for publication June 29, 1979.




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