Abstract
SummaryCotton leaf reddening was studied in irrigated vertisols at the Gezira Research Farm over three seasons. The percentage leaf reddening was negatively correlated with seed cotton yield. Plants showing symptoms of reddening produced smaller and fewer leaves which did not persist long enough to sustain the reproductive parts. Deficiencies of nitrogen and phosphorus were found to be responsible for the reddening symptoms. Nitrogen application, late August sowing and frequent control of insect pests all significantly reduced the incidence of reddening. Other possible remedies are discussed.
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