Previous research at Narrabri Agricultural Research Station and elsewhere has shown that mite populations increase more slowly on okra leaf cotton genotypes than on normal leaf genotypes (Bailey et al., 1978; Thomson,

This review of the literature referring to A. macrospora indicates the extent of current knowledge about the pathogen and the disease it causes.

Greg Constable and I have previously shown that in the Namoi Valley an irrigation water supply of 8 ML per ha is needed to obtain maximum yields in the driest years.