Browsing by Author "Simbwa-Bunnya, M.N."

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A Survey of Sugar Disease and Pests in East Africa
(1972) Rogers, P. F.; Simbwa-Bunnya, M.N.; Kedemi, R.M
A survey of sugar-cane diseases and pests in East Africa carried out in 1970 indicated that brown spot (Cercospora longipes Butler)and culmicolous smut (Ustilago scitaminea Syd.) are the major diseases and that white stem scale (Aulacaspis tegalensis (Zehntner), pink mealy bug (Saccharicoccus sacchari Ckll.) and cane stem borer (Eldana saccharina Wlk.), the major pests. Mosaic (sugar-cane mosaic virus), red stripe (Xanthomonas rubrilineans (Lee et al.) Starr et Burkh.) and pokkah boeng (Gibberella moniliformis (Sheldon) Wineland) were recorded but were not considered to be important. Marked differences in incidence of diseases and pests were shown in the six geographically distinct areas surveyed. Methods used to produce a yield loss index for diseases estimated and pests (9.5 per cent and 6.0 per cent loss respectively) are described. Regular surveys are suggested as useful monitors of changes in diseases and pests levels which at present are fairly low.