Volume 9 Number 4, 1994

Research reports

Studies on the germination of mission grass (Pennisetum polystachion (L.) Schultes) seeds. B.S. Ismail, M.S. Shukri and A. Shukor Juraimi.

122

Susceptibility of apple varieties to attack by the woolly aphid, Eriosoma lanigerum (Hausmann) (Hemiptera: Pemphigidae). S.K. Asante.

126

Economic justifications for government involvement in weed management: a catalogue of market failures. David J. Pannell.

131

Contracting out weed control. Seminar proceedings

Management strategies for contracting weed control. Jim Laity.

138

Contract documentation. Roderick McIvor.

140

Herbicide usage and contracting. Chris Knight.

142

Conservation of natural resources—a shift in departmental policy. David McKenzie.

144

Performance standards in weed control—setting them and achieving them. Christopher Deakin and Stephen Thorpe.

146

The professional image. Rosemary Henderson.

148

Contracting out weed control—selection of contractors. Peter Quin.

149

Legal issues, liability and litigation. Michael Psaltis.

151

Licensing and herbicide usage. John Brereton.

151