Prospects for Biological Control of Watsonia Species Species (Table 1)
90 Plant Protection Quarterly Vol.8(3) 1993 Kloot, P.M. (1987c). The naturalized flora of South Australia. 3. Its origin, intro- duction, distribution, growth forms and significance. Journal of the Adelaide Botanic Gardens 10, 99-111. Menz, K.M. and Auld, B.A. (1977). Gal- vanized burr control and public policy toward weeds. Search 8, 281-7. Pate, J.S. and Dixon, K.W. (1982). ‘Tuber- ous, cormous and bulbous plants’. (University of Western Australia Press, Nedlands). Parsons, W.T. and Cuthbertson, E.G. (1992). ‘Noxious weeds of Australia’. (Inkata Press, Melbourne, Australia). Phillips, R. and Rix, M. (1989). ‘Bulbs’. 2nd edition. (Pan Books, London, UK). Wilkinson, L. (1990). Systat, the system for statistics, version 5.0. Systat Inc., Champaign, Illinois, USA. Zar, J.H. (1986). ‘Biostatistical analysis’. 2nd edition. (Prentice-Hall, New Jer- sey, USA). Figure 6. The response of corm production to slashing at selected intervals. The time interval between 1, 2 and 3 is two weeks; the remaining intervals one week. Labels indicate those points which are significantly different: Gumeracha (g), Balhannah (b), both of the other sites (*). erences to organisms attacking Watsonia Prospects for biological control of Watsonia species species (Table 1). Most records are of polyphagous or pest organisms and need not be considered further. Le Maitre John K. Scott, CSIRO Division of Entomology, Private Bag, PO Wembley, (1984) observed that up to 78.1% of ova- WA 6014, Australia. ries had been bored or partly eaten by in- sects in a study of seed predation of Summary concern with the invasion of Watsonia Watsonia borbonica (Pourret) Goldblatt in Watsonia species are suitable targets for species into native vegetation has lead to South Africa.
[Show full text]