The leaf reddening of Gossypium spp was first reported in southern Pakistan (Sindh) in 2001. The symptoms appeared with yellowing of leaves and then turned to red at adult plant stage. The seedcotton and lint yield (kg/ha) were decreased upto 27% and 30% respectively in Distt: Sanghar and Mirpurkhas. The collection of germplasm/strains and, local/commercial varieties of cotton showed varying response for leaf reddening screening. It was not genetical but it was rather due to complex factors associated with drought conditions. The application of foliar spray of essential macro and micro nutrients K, Zn, Mg and B did not exhibit visible symptoms. However, leaf analysis showed the partly reddening of leaves in control treatments due to the deficiencies of K and Zn nutrients.

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