Browsing by Author "Rogers, P. F."
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Item Proceedings Of the Meeting on The Yellow Wilt Condition Of Sugar Cane - A Special Meeting of the East Africa Specialist Committee on Sugar Cane Research.(East African Agricultural And Forestry Research Organization, 1969) East African Agricultural And Forestry Research Organization; Rogers, P. F.At the second meeting of the East African Specialist Committee on Sugar Cane Research, held in Dar es Salaam in. January, 1969, the committee agreed that a meeting should be held in 1969 on the subject of the yellow wilt condition of sugar cane. The purpose of the meeting would be to:- 1) Collect together all available information. 2) Discuss, define and co-ordinate research. The meeting was held on June 25th and 26th at the East African Community Regional Headquarters, Nairobi, Kenya. . There were 35 participants from 11 countries. The present publication consists of the following: * Summary of recommendations. * List of participants. * Agenda, * Proceedings * Appendix: Working Papers and Notes on reports presented to the meetingItem Sugar-Cane Diseases of Potential Importance in East Africa(1971) Rogers, P. F.Four major diseases of sugar-cane are at present found in Southern Africa, Madagascar and the Mascarene Islands and are of potential importance in East Africa. The diseases are leaf scald, gumming disease, chlorotic streak and Fiji Disease. Exclusion of the diseases from East Africa depends on effective plant quarantine procedures and on the observance of import regulations. The control of outbreaks is discussed with reference to short- and long-term measures. The former consist of attempts to eradicate the pathogen with attempts at isolation should this fail. Long-term measures involve chemical and cultural control practices where these are known to be effective, together with the use of resistant varieties.Item A Survey of Sugar Cane Diseases and Pests in East Africa(1972) Rogers, P. F.; Simbwa-Bunnya, M. N.In order to assign priorities for research on control of diseases and pests of crops efficiently, it is first necessary to establish which are the most important of these and, if possible, which are most likely to increase in importance. Essential data may be gained by making surveys of disease and pest incidence and relating this with loss of yield.Item A Survey of Sugar Disease and Pests in East Africa(1972) Rogers, P. F.; Simbwa-Bunnya, M.N.; Kedemi, R.MA 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.
