Biological methods of bruchid control in the tropics: a review.
Various biological control methods for bruchids on stored legumes in the tropics are reviewed. Cultural control techniques such as timely and frequent harvesting, legumes planted away from granaries, crop hygiene and storage pods, are within the technical and financial means of the small-scale farmer. The use of inert substances, vegetable oils and repellent plants may be cheap and effective if properly managed. The use of controlled atmospheres, vacuums, heating, cooling and sterilizing require relatively advanced techniques. Growth regulators and pheromones are currently not available for control. Varieties resistant to bruchids have been identified, but incorporation of resistance into suitable varieties has proven to be difficult. It is suggested that biological control of bruchids should receive more attention and that socio-economic and cultural aspects should be taken into account.