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Since the discovery of mosaic on the variety Co.281 a few years ago an attempt has been made to determine the extent of the outbreak, the varieties affected, the effect on the cane, and any factors which may be contributory in determining the spread of the disease. To assist us in this work the services of several government inspectors of the Division of Botany and Plant Pathology were made ava...

I am particularly pleased to be able to join you all today at your 72nd Annual Congress, for both personal and professional reasons. The personal reason is that, although I worked for six years as a University lecturer not that far to the North of here, in Zambia and Congo (the former Zaire), this is my first visit to Durban, a city that I have heard so much about. The professional reason is th...

In this work, the hierarchical decomposition methodology was used to conceptually design the production of fuel ethanol from sugarcane. The decomposition of the process into six levels of analysis was carried out. Several options of technological configurations were assessed in each level considering economic and environmental criteria. The most promising alternatives were chosen rejecting the ...

This study models the amount of water stored in the millable stalk as a function of the dry weight of the stalk structures and of the stored sucrose. The correlation was highly significant (r=0.98, n=30). Structural material was equated to the difference between the stalk total dry weight and sucrose. Knowing the effect of the water deficit on the water content of the cane, the deficits were co...

Varieties NCo376 and N14 are the most widely grown varieties in Zimbabwe and are used as control varieties in the selection programme. The success of NCo376 was due to its high yield potential throughout the year and its ability to maintain good yields, even in advanced ratoons. A study was done to compare the performances of N14 and NCo376 in the South-East Lowveld of Zimbabwe, using data from...

Contemporary evolution can shape ecological dynamics at population, community and ecosystem levels. Innovative new experiments with walking sticks confirm this expectation by showing that adaptation to predatory birds has large effects on walking stick population sizes, arthropod communities and herbivory.

An analyt~cal method has been developed which can be used for routine detect1011 and estiinatlon of oligosacchar~des in cane sugar products. Levels as low as 0.01% can be detected and oligosacchaiides have beell found in all m~l l and refinery products. The method IS based on giadient elutlon wlth aqueous ethanol, usiilg a carbon-celite column. Samples of about zoo mg glve good results for most...

on to a heavy wooden mill which is revolved by the bulls moving in a circle round the mill. The old man was bending over the crushing blocks to remove sugar-cane debris when his long hair got undone and was caught in the mill. The bulls continued to move round in a circle which resulted in his hair being wound into the mill. He was dragged round the mill and fruitlessly tugged to get free. His ...