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The International Working Conference on Stored Product Protection (IWCSPP), held every four years, is the premier world forum for presentation of research results bearing on the safe storage of durable foodstuffs, particularly cereal grains, pulses, and oilseeds. The 6th IWCSPP was held in Canberra, Australia from 17-23 April 1994, under the auspices of CSIRO, the Australian Centre for International Agricultural Research (ACIAR), and the Australian grain handling and storage industry. These two volumes present the proceedings of the conference. There were over 400 participants. Apart from Australia, there were substantial contingents from Brazil, Canada, China, France, Germany, India, Indonesia, Israel, Pakistan, the Philippines, the UK and the USA. A further 20 countries were represented. The overall objective was to present advances in research and development on the preservation of stored durable commodities since the 5th IWCSPP held in Bordeaux, France 1990. Much had happened in the intervening four years: the role of methyl bromide had come under scrutiny; pressure from consumers and environmentalists to reduce chemical additives to foodstuffs had become more intense; that mycotoxin contamination of food and feedstuffs was a serious threat to human and animal health had gained general acceptance. Recognizing these and related issues the theme "Stored product protection - a Time of Challenge" was adopted for the conference. Some 250 papers were presented. These proceedings volumes contain, in addition to most of those papers, reports of a series of workshops on specialist topics - trapping, application of inert dusts, extension and small-scale and farm storage, standards, expert systems and appropriate storage - that were also part of the scientific program. Overall, the volumes provide an essential update for entomologists, plant pathologists, engineers and others concerned with stored product protection.
That residues of pesticide and other "foreign" chemicals in foodstuffs are of concern to everyone everywhere is amply attested by the reception accorded previous volumes of "Residue Reviews" and by the gratifying en thusiasm, sincerity, and efforts shown by all the individuals from whom manuscripts have been solicited. Despite much propaganda to the contrary, there can never be any serious question that pest-control chemicals and food additive chemicals are essential to adequate food production, manufacture, marketing, and storage, yet without continuing surveillance and intelligent control some of those that persist in our foodsmffs could at times conceivably endanger the public health. Ensuring safety-in-use of these many chemicals is a dynamic challenge, for established ones are continually being displaced by newly developed ones more acceptable to food technologists, pharma cologists, toxicologists, and changing pest-control requirements in progressive food-producing economies. These matters are also of genuine concern to increasing numbers of governmental agencies and legislative bodies around the world, for some of these chemicals have resulted in a few mishaps from improper use. Adequate safety-in-use evaluations of any of these chemicals persisting into our food stuffs are not simple matters, and they incorporate the considered judgments of many individuals highly trained in a variety of complex biological, chemi cal, food technological, medical, pharmacological, and toxicological dis ciplines.