Bholl shedding in cotton was attributed to either insect pests or physiological disorders.Plant regulat- ors have been reported to be very effective in correcting some of the physiological disorders (Bhatti and Date.1955:Negi end Avtar Singh.1956:Bhardwaj et al.1963)/Foliar application of Naphthalene ace- tic acid at 10ppm was found to be useful on MCU 1.MCU 4.PRS 30/2 and Sujatha varieties(Bhat.1972) and also on krishna variety (Sudha krishna Mukerji.1973)of Cotton.However,the efficacy of NAA on MCU 5 cottan has not been so for reported NAA is now commercially available as Planofix and Fruitof ix.The present investigation was taken up to compare their efficacyand to fix up the optimum concentration and time of application.
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