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Articles by F.S. Murungu
Total Records ( 2 ) for F.S. Murungu
  I. Matimati , E. Hungwe and F.S. Murungu
  A trial was carried out at Horticultural Research Centre, 64 km east of the capital city of Harare, to evaluate the productivity of four cultivars of micropropagated sweet potatoes when compared to farm retained planting material. The site received an annual rainfall of 850 mm and a mean temperature of 21°C during the growing season. Survival, vine length and tuber yield of both micropropagated and farm-retained planting material of four sweet potato cultivars was evaluated during the 2002/3 growing season. The evaluated cultivars were Chingova, Chigogo, Mozambique White and Germany II. A 4x2 factorial experiment in Randomized Complete Block Design (RCBD) with three replicates was established. Survival percentages of sweet potatoes did not improve significantly (p>0.05) with micropropagation for all the cultivars. There were no significant differences in vine length between micropropagated and farm-retained planting materials for the cultivars Chingova and Germany II whilst Chigogo had longer vines after micropropagation at both six and ten weeks from planting. Mozambique white showed a decrease in average vine length after micropropagation at six weeks from planting. However no significant differences were noted after ten weeks from planting. The magnitude of response to micropropagation differed with cultivar in terms of mean tuber weight. Micropropagated Mozambique white yielded 25t ha−1 as compared to the farm-derived Mozambique white, which had 8 t ha−1. Yields from micropropagated Chingova (19 t ha−1) were more than two times higher than those from farm-retained crop (9 t ha−1). Micropropagated Chigogo yielded 21 t ha−1 as compared to its farm-retained material, which had 15 t ha−1. Micropropagated Germany II yielded 15 t ha−1 and the farm-derived yielded (13 t ha−1). This could imply differences in susceptibility of cultivars to pathogen infection and use of micropropagated planting material may result in increased yields for varieties such as Mozambique White and Chingovha.
  F.S. Murungu , P. Nyamudeza , F.T. Mugabe , I. Matimati and S. Mapfumo
  Recent studies on pearl millet transplanting have shown that early harvesting is possible through establishment of nurseries and transplanting with early rains. These studies also showed that age of transplants and the time of transplanting are important issues requiring further consideration. The objective of the study was to investigate the effect of age of transplants on growth, yield and yield components of pearl millet. The study also quantified transplanting shock by comparing performance of transplants against non-transplants. The study was carried out over two seasons, the 2001/2002 and 2002/2003 seasons at Save Valley Experiment Station in a semi arid area of Zimbabwe. There were three factors in the experiment, three nursery sowing dates (2 November-SD1; 12 November-SD2 and 22 November-SD3), variety and method of planting (direct or transplanting). Varieties used were PMV2 and PMV3. The design was a 3x2x2 factorial in a Randomised Complete Block Design replicated three times. Seeds of the two varieties were also sown on the day of transplanting (12 December-SD4) resulting in two additional treatments. Days to flowering and maturity, dry weight, grains per panicle, 1000 seed weight and grain yield (kg ha-1) were measured. There were significant sowing date x planting method interactions on time to flowering and maturity. Transplanting increased time to flowering and maturity while delayed sowing decreased time to flowering and maturity. Transplants had lesser dry weights compared to non-transplants though relative growth rate appeared to be the same between transplants and non-transplants. In the 2001/2002 season there was a significant (p<0.05) interaction between Sowing Date (SD) and planting method on yield. Thirty and 40-day-old transplants performed better than 20-day-old transplants. For non-transplants, delayed sowing reduced yields by about 900 kg ha-1 from SD1 to SD4. A similar trend was observed in the 2002/2003 season. Thirty-day-old transplants out yielded SD4 non-transplants by 63 and 26% in the first and second seasons, respectively. It was concluded that for late planting (12 December onwards) transplanting with 30-day-old transplants may yield better than direct sowing in pearl millet.
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