APPLYING PESTICIDES: MANAGEMENT, APPLICATION, SAFETY. American Association for Vocational Instructional Materials, Athens, Georgia, USA, 1976. Pp. 96. US $4.95. METHODS OF APPLYING HERBICIDES FOR AQUATIC WEED CONTROL. D. N. Riemer and J. A. Meade. Cooperative extension services of the northeastern states, New Brunswick, USA. Pp. 17 ANNUAL REVIEW OF ENTOMOLOGY, VOLUME 23. Edited by T. E. Mittler, C. N. Smith and V. H. Resh. Annual Reviews Inc., Palo Alto, California. USA, 1978. ISSN 0066 4170. ISBN 0 8234 01234. Pp. 523 Price US $17.00 in USA, US $17.50 elsewhere. PLANT DISEASE EPIDEMIOLOGY. Edited by P. R. Scott and A. Bainbridge. Blackwell Scientific Publications Ltd, 1978. ISBN 0 632 00372 3. Pp. 329. Price £9.00. PENTACHLOROPHENOL. Edited by K. Ranga Rao. Plenum Press, New York and London, 1978. ISBN 0 306 36312 7. Pp. xiv + 402. Price US $45.00. THE TROPICAL TUBER CROPS: YAMS, CASSAVA, SWEET POTATO AND COCOYAMS. I. C. Onwueme. John Wiley, Chichester and New York, 1978. ISBN 0 471 99608 (cloth); 0 471 99607 (paper). Pp. xiv + 234. Price £11.00 cloth; £5.50 paperback. DISEASES, PESTS AND WEEDS IN TROPICAL CROPS. Edited by J. Kranz, H. Schmutterer and W. Koch.