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Four integrated control strategies were developed for wattle that could not be removed for utilization. In the first two strategies, a combination of mechanical and/or chemical control methods either reduced the wood biomass in situ (fell, stack and burn) or retained the wood biomass above the soil surface (control of standing trees). Fol-lOw-up control involved a combination of chemical control and burning high fuel loads of sown pastures species. For the third strategy, dense infestations were contained and prevented from encroaching into neighbouring veld (grasslands). These infestations were controlled once sufficient funds became available, or converted to wood lots and shelter belts. The fourth strategy descri~es control of dense seedling regeneration promoted by uncontrolled fire, and the calculation of a reserve 'fire fund'. A customized management plan was developed for a particular property that assigned these six integrated control strategies to infestations in different situations. Prioritizing the infestations allowed the optimum allocation of the available resources within a realistic time span, thereby ensuring sustained progress was made in the reduction of infestations to acceptable levels.

A complex dormancy mechanism in seeds of the weed Rubus cunei/o/ius J. van StadenDepartment of Botany, University of Natal Peta L. Campbell Plant Protection Research Institute, PietermaritzburgBoth the endocarp and embryo contribute to the dormancy of Rubus cuneifolius seed. Whereas scarification was found to break the dormancy imposed by the endocarp, embryo dormancy could only be overcome by a combination of treatments. These treatments consisted of a one·month stratification period followed by incubation at an alternating temperature of 10 -20 °C in the presence of light. S. Afr. J. Plant Soil 1984, 1: 48 -50Die endokarp sowel as die embrio dra by tot die rustoestand van Rubus cuneifolius·saad. Alhoewel skarifisering die rustoestand wat deur die endokarp veroorsaak word ophef, kon die rustoe· stand van die embrio slegs deur 'n kombinasie van behandelings opgehef word. Hierdie behandelings behels 'n stratifikasie·tydperk van een maand, gevolg deur inkubasie by wisselende temperature van 10 -20°C in die teenwoordigheid van lig. S.·Afr. Tydskr. Plant Grand 1984, 1: 48 -50

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