The cornerstone of most pest management programs world-wide is the "Economic Threshold" concept which is based on the principle of controlling a pest only if it is economically prudent to do so i.e.

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,

The reliance of the Australian cotton industry on insecticides for the control of insect pests represents a major economic and environmental concern. In the face of pesticide resistance in H.

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

The fungus Colletotrichum orbiculare(Berk. et Mont.) v. Arx (Walker and Nikandrow, unpublished data) was found causing anthracnose on X.