Effects of alpha naphthalene acetic acid on fruiting patterns and yield of irrigated cotton in central Queensland

Abstract

The effects of single and multiple applications of 10 p.p.m. of alpha naphthalene acetic acid were tested over the squaring and flowering period in four trials. Results indicate that although retention of squares or immature bolls may result from application two weeks after the peak count of squares on the plant, this effect is transitory and boll counts return to normal within two weeks. No differences in total fallen fruit forms, fruit form production, number of harvestable bolls or yield were observed in any trials. It is concluded that treatment with this chemical has no place in Central Queensland.