Control of Parthenium hysterophorus L. in Tamil Nadu, India - a study of farmers' practices
N Raveendaran, Sabitha, P Jeyasudha and C Jeyalakshmi, Tamil Nadu Agricultural University, Coimbatore, India

Investigation of period threshold and critical period of weed competition in young tea, Camellia sinensis
K G Prematilake, Tea Research Institute, Ratnapura, Sri Lanka
R J Froud-Williams, University of Reading, UK
P B Ekanayake, Tea Research Institute, Kandy, Sri Lanka

New weed management system in no till irrigated rice aiming to improve red rice control
L L Foloni, Universidade de Campinas, São Paulo, Brazil

Control of Cyperus rotundus on Vertisols and vertic clays in Ghana
E O Darkwa, B K Johnson and K Nyalemegbe, Agricultural Research Station, Kpong, Ghana
P J Terry, IACR-Long Ashton, Bristol, UK
T J Willcocks, Natural Resources for Development, Maulden, UK

The potential of low volume herbicide application in developing agriculture
G A Matthews, IPARC, Silwood Park, UK
J S Clayton, Micron Sprayers Ltd, Bromyard, UK

Weed management in semi-arid agriculture: application of a soil moisture competition model F-B van der Meer
S J Twomlow and P M C Bruneau, Silsoe Research Institute, Bedford, UK
I Reid, University of Loughborough, UK

Semi-arid maize yield responses to conservation tillage and weeding
S J Twomlow, Silsoe Research Institute, Bedford, UK
H Dhliwayo, Department of Research and Specialist Services, Harare, Zimbabwe