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d in somecountries. However, there is wide gap in the technology of storage between the industrial- 2 Rajendran ized and developing nations. This has been especially so in tropical and humid regions, where the pest problem is acute, control measures are improperly performed, either owingto lack of knowledge or to cost factors, and insects resistance to pesticides is common. Tobridge the gap, technical tie-ups or collaborative research programs between advanced anddeveloping nations are needed. There are certain major issues common to all countries, which can only be resolved by joint venture. These include mycotoxins in grains ( and the incidence of insecticide and fumigant resistance in insects (. In addition to incentivesfor grain at safe moisture levels, development of grain-drying system that is affordablein developing country, will help reduce the mycotoxin problem to some extent. Largeexpenditures are involved in development of newer insecticides and to generate data to meetregistration requirements. The absence of newer chemicals and regulatory restrictions or reregistration requirements for the chemicals already in use exacerbate the situation. There has been change in the pest scenario such that some of the insect pests have gainedprominence probably owing to elimination or absence of their natural enemies. Psocids in storage facilities in hot and humid regions in Asia and the larger grain borer Prostephanus truncatus in African countries are typical examples. Physical control methods have been one focus, albeit that they are costlier and total insect kill may not always occur when used alone. Heat treatment is promising, for it acts quite rapidly, but one needs to know more about its mechanism and the sensitivity system in insects to potentiate the action. combination of two physical methods or supplementa-tion of physical method with chemical method at reduced dosages often may be eco-nomical and efcient. Top dressing with Dryacide in silo wh