Crocus corms with different amounts of infection by Penicillium corymbiferum were planted in field plots in October 1982 and harvested in the following July. Differences in infection at planting had no effect on the development of the disease on harvested stored corms. Corms with 40–60% surface area infected by P. corymbiferum at planting had a reduced mean weight of harvested corms and yield (kg corms harvested per kg corms planted) compared with corms with 4–10% surface area infected at planting. Dipping corms in benomyl, captafol, tnancozeb or thiram solutions after harvesting failed to control the disease. The severity of disease was increased by damage occurring before storage and was reduced by delaying harvesting.
https://papers.acg.uwa.edu.au/p/605_58_Sutton/
METHODWe performed an environmental classification of MRDs using ESRI ® ArcGIS TM version 8.3 software, and a basic risk assessment of land-use using SAS ® Enterprise Guide ® version 3.0.0. statistical analysis software. Selected sites within the Ekurhuleni Metropolitan Municipality (EMM) were chosen for the study. Sections of two major goldfields fall within the EMM: the Central Rand Goldfield and the East Rand and Heidelberg Goldfield. The EMM is the largest industrial area in South Africa and a century ago was the world's largest producer of gold. However, gold mining now contributes only about 2% to the economy of the EMM.
Data Acquisition
Aerial photographsWe obtained aerial survey photographs (orthorectified and geo-referenced) taken in February 2003 from the Development Planning Department Corporate Office of EMM. Historical aerial photographs for 1938 and 1964 were obtained from two other sources (Table 1). The 1938 hard copy photographs had been scanned at 450 dots per inch (dpi) producing an equivalent ground sampling distance of 1 m. Images were orthorectified with a 10 m digital elevation model (DEM) generated from 5 m contours with TOPOGRID in ARC/INFO and mosaicked using hot-spot removal and colour-balancing between overlaps. Hard copy photographs for 1964 were scanned at 800 dpi, orthorectified and geo-referenced using ESRI ® ArcGIS TM 8.3.
RESUMO Em casa de vegetação da Escola Superior de
SUMMARY: DRY MATTER YIELD OF FOUR ALFALFA CULTIVARS GROWN IN A RED YELLOW LATOSOL WITH LIMING AND POTASSIUM FERTILIZATION (Crioula, Moapa, Florida77 and CUF101) were studied. A randomized complete block design,
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