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Book (series)Guide to the classical biological control of insect pests in planted and natural forests 2019
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No results found.Insect pests damage millions of hectares of forest worldwide each year. Moreover, the extent of such damage is increasing as international trade grows, facilitating the spread of insect pests, and as the impacts of climate change become more evident. Classical biological control is a well-tried, cost-effective approach to the management of invasive forest pests. It involves the importing of “natural enemies” of non-native pests from their countries of origin with the aim of establishing permanent, self-sustaining populations capable of sustainably reducing pest populations below damaging levels. A great deal of knowledge on classical biological control has been accumulated worldwide in the last few decades. This publication, which was written by a team of experts, distils that information in a clear, concise guide aimed at helping forest-health practitioners and forest managers – especially in developing countries – to implement successful classical biological control programmes. It provides general theory and practical guidelines, explains the “why” and “how” of classical biological control in forestry, and addresses the potential risks associated with such programmes. It features 11 case studies of successful efforts worldwide to implement classical biological control. -
DocumentGuidelines for the Registration of Biological Pest Control Agents 1988
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No results found.Biological pest control agents are naturally occurring or genetically modified agents that are distinguished from conventional chemical pesticides by their unique modes of action, low use volume, and target species specificity. These guidelines include information on biochemical and microbial pest control agents and their data requirements. -
Book (stand-alone)Papers presented at the Symposium on Biology, Stock Assessment and Exploitation of Small Pelagic Fish Species in the African Great Lakes Region. Bujumbura (Burundi). 25-28 November 1992. 1993
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No results found.This document contains the papers presented at the Symposium on Biology, Stock Assessment and Exploitation of Small Pelagic Fish Species in the African Great Lakes Region. The symposium, jointly organized by the FINNIDA/FAO/AGFUND project Research for the management of fisheries on Lake Tanganyika (LTR) and the FAO/UNDP project Inland Fisheries Planning, Development and Management in Eastern/Central/Southern Africa (IFIP), was held in Bujumbura, Burundi from 25 to 28 November 1992. The Lakes a nd Reservoirs included in the 20 Symposium papers are Itezhi-Tezhi, Mweru-Luapula, Malawi, Kariba, Kibu, Tanganyika and Victoria. The small pelagic species treated are Limnothrissa miodon, Stolothrissa tanganicae, Rastrineobola argentea, Poecilothrissa moeruensis and Engraulicypris sardella. The topics covered include biology, life history, growth and mortality and various aspects of the fisheries.Small body size is a feature of Limnothrissa miodon in the man-made Lakes Kariba and Cahora Bassa. Recent reliable determinations of their growth confirm the earlier very high estimates of their mortality. These high mortality rates are consistent with the small body size of the fish. A similar allometric relationship applies to the production/biomass ratios. Because most fish die after a few months there is no relationship between fishing effort and catch. Regulating effort may therefore contribute little to the management of this stock. The greatest risk to the fishery is a collapse of recr uitment and there is an urgent need to understand the factors that regulate reproduction.
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