Volume 13 Number 3, 1998

Research reports

Effect of herbicides on seedhead production and control of serrated tussock (Nassella trichotoma (Nees) Arech.). M.H. Campbell, L.G. Miller and H.I. Nicol.

106

Tolerance to herbicides of ground cover species for New Zealand orchards. K.C. Harrington and A. Rahman.

111

Weed seedbank estimation, spatial distribution, decline and potential for predicting future weed populations. A. Rahman, T.K. James, G. Bourdôt and N. Grbavac.

117

Weed invasion of the tropical Mackay coast, Queensland, Australia. George N. Batianoff and Andrew J. Franks.

123

Mechanical defoliation as a management tool for kyllinga (Cyperus brevifolius) in irrigated pasture. F.L.F. Henskens.

131

Effect of abamectin on citrus rust mite Phyllocoptruta oleivora and brown citrus rust mite Tegolophus australis and the scale natural enemies Aphytis lingnanensis and Chilocorus circumdatus on oranges. D. Smith, N.J. Smith and K.M. Smith.

136

Effects of water stress, shading and clipping on growth and development of Asystasia gangetica. Ismail B. Sahid and A. Shukor Juraimi.

140

Tolerance to soil type of pink ground pearl Eumargarodes laingi Jakubski (Hemiptera: Margarodidae) on sugarcane. B.C. Dominiak, N.G. McGill, and P.G. Allsopp.

143

Mapping blackberry thickets in the Kosciuszko National Park using airborne video data. Paul Frazier.

145