567 1 archive 288 disk0/00/00/05/67 2003-03-19 2009-08-20 14:19:01 2009-08-20 14:19:01 conference_item show 0 en rirdc 2-6 February 2003 Solutions for a Better Environment. 11th Australian Agronomy Conference Deakin University, Geelong, Victoria yes 0 http://www.regional.org.au/au/asa/2003/c/13/kristiansen.htm http://www.une.edu.au/agronomy/weeds/organic/ TRUE paper Kristiansen P Mr Sindel B Dr Jessop R Dr pub 5vegetables 9weed weeds; vegetables; lettuce; herbs; echinacea; organic farming; hand weeding; tillage; hay; paper mulch Weed management is reported to be a major constraint in organic agriculture. Organic growers also report a lack of information about non-chemical weed control. A series of field trials was conducted in lettuce (Lactuca sativa L.) and echinacea (Echinacea purpurea (L.) Moench) crops to evaluate a range of weed control methods commonly used in organic herb and vegetable production systems. The criteria for evaluating the methods were weed growth, crop yield and cost effectiveness. Hand weeding, tillage and organic mulches (hay and pelletised paper) were effective to very effective at suppressing weeds. In general, good weed suppression was correlated with good crop yields; however, crop yields were reduced by tillage and paper mulch. Deducting the cost of the weed control method from the gross crop value caused a greater re-ranking of the treatment performance in lettuce than in echinacea. This is partly due to the different growing season lengths and market prices of the two test crops. The most cost effective methods for managing weeds in lettuce were tillage and hand weeding. When weed competition is low, the unweeded control treatment was also cost effective. In echinacea, hand weeding and hay mulch were consistently the most cost effective methods for managing weeds. 2003 published Proceedings of the 11th Australian Agronomy Conference CD-ROM. Australian Society of Agronomy (1) Kristiansen, P.E., Jessop, R.S., and Sindel, B.M. 2001. 10th Aust. Agron. Conf., Hobart www.regional.org.au/au/asa/2001/6/c/kristiansen.htm (2) Dumaresq, D. 1997. In: Organic Agriculture in Australia. Eds. D. Dumaresq, R. Greene and L. van Kerkhoff, pp. 1-4. RIRDC, Barton. (3) Olsen, J.K. and Gounder, R.K. 2001. Aust. J. Exp. Agric., 41: 93-103. (4) Penfold, C.M. & Miyan, M.S. 1996. 11th Aust. Weeds Conf., Melbourne. pp. 73-75. (5) Tyler, S. 1999. Results of Organic Waste as Mulch on Echinacea. Ecofix, Gosford. (6) Litterick, A.M., Redpath, J., Seel, W., and Leifert, C. 1999. Proc. 1999 Brighton Conf. - Weeds. pp. 951-956. (7) Smith, D.R., Gilliam, C.H., Edwards, J.H., Olive, J.W., Eakes, D.J., and Williams, J.D. 1998. J. Env'l. Hortic., 16: 69-75. public 1438 1 567 1 application/pdf en public

geelong_paper.pdf

geelong_paper.pdf 197632 http://orgprints.org/567/1/geelong_paper.pdf 1439 1 567 2 other en public

geelong_presentation.ppt

geelong_presentation.ppt 989696 http://orgprints.org/567/2/geelong_presentation.ppt