The majority of South African sugarcane varieties are resistant to mosaic but two widely grown varieties, NCo 376 and.NCo 293, are highdy susceptible. Application of Temik (aldicarb) to the soil at planting was not beneficial in controlling mosaic. Mosaic transmission was restricted to January to May but very rapid spread only occurred in mid January to March, i.e. late summer and early autumn....

The reaction of atomic hydrogen with isocyanic acid (HNCO) to produce the amidogen radical (NHZ) and carbon monoxide, (W)) H + HNCO NH2 + CO has been studied in shock-heated mixtures of HNCO dilute in argon. Time-histories of the ground-state NHZ radical were measured behind reflected shock waves using cw, narrowlinewidth laser absorption at 597 nm, and HNCO time-histories were measured using i...

In order to investigate the selective catalytic reduction of NOx by hydrocarbons, Ag/Al2O3 models were constructed by means of density functional theory (DFT) and experimental results. The geometrical structures and vibrational frequencies obtained at B3LYP levels of DFT were compared with the corresponding experimental results. EXAFS results suggest silver ion species were predominant on the A...

There are several areas in the South African sugar industry where the ubiquitous variety, NCo 376, is beingsuperseded by newer varieties. Growers have a choice of varieties which have outyielded NCo 376 in trials under a wide range of conditions. There are others which have yielded more than NCo 376 in certain conditions. It is opportune to report the results of trials that have been conducted ...