Allelopathy in Ecological Agriculture and Forestry, 2000 Proceedings of the III International Congress on Allelopathy in Ecological Agriculture and Forestry, Dharwad, India, 18–21 August 1998

The rapidly growing human population has increased the dependence on fossil fuel based agrochemicals such as fertilizers and pesticides to produce the required agricultural and forestry products. This has exerted a great pressure on the non­ renewable fossil fuel resources, which cannot last indefinitely. Besides, indiscriminate use ofpesticides for pests (weeds, insects, nematodes, pathogens) control has resulted in serious ecological and environmental problems viz. , (A) Increasing incidence of resistance in pest organisms to important pesticides. (B) Shift in pests population, particulary in weeds and insects. In weeds, species that are more closely related to the crops they infest have developed. In insects, scenario is most grim, the predators have been killed and minor insect pests have become major pests and require very heavy doses ofhighly toxic insecticides for their control. (C) Greater environmental pollution and health hazards (a) particularly from contamination of surface and underground drinking water resources and (b) from their inhalation during handling and application. (D) Toxic residues of pesticides pollute the environment and may prove hazardous to even our future generations. (E) Some agricultural commodities may contain minute quantities ofpesticides residues, with long tenn adverse effects on human and livestock health. Therefore, serious ecological questions about the reliance on pesticides for pests control has been raised. The use of fertilizers, besides causing environmental problems has also impoverished the soil health and decreased the beneficial soil fauna. For example, in some major crop rotations viz.

Preface. List of contributors. Section I: Ecological Agriculture. 1. Proceedings of conference. 2. Allelopathy in ecological agriculture; S.S. Narwal. 3. Allelopathic strategies for eco-friendly crop production; S. Facknath, B. Lalljee. 4. Allelopathic interactions in soil; B. Lalljee, S. Facknath. 5. Ecofriendly technologies for management of phytoparasitic nematodes in pulses and vegetable crops; V. Mojumder. Section II: Allelochemicals as Herbicides. 6. Plant and microbial compounds as herbicides; R.E. Hoegland, S.J. Cutler. 7. Discovery of triketone class of HPPD inhibiting herbicides and their relationship to naturally occurring betatriketones; C.G. Knudsen, et al. 8. Phytotoxins as potential herbicides; F. Sugawara. 9. Evaluation of selected pharmaceuticals as potential herbicides: bridging the gap between agrochemicals and pharmaceuticals; S.J. Cutler, et al. Section III: Multiple Cropping Systems. 10. Allelopathic interactions in multiple cropping systems; S.S. Narwal. 11. Prospects of allelopathic research in multi-storey cropping systems; J. John, A.M. Nair. Section IV: Agroforestry Systems. 12. Allelopathic interactions in forests; M.J. Reigosa, et al. 13. Allelopathic interactions in agroforestry systems; A.S. Gill, J.V.N. Prasad. 14. Allelopathic research in agroforestry systems of South India; C.S. Hunshal, et al. 15. Tree allelopathy in agroforestry; M. Parmathama, et al. 16. Toxic allelochemicals in leguminous forages and their ecological significance; S.S. Parihar. Section V: Appendices. I. Organizing committees of congress. II. Technical programme of congress. III. List of participants in congress. Section VI: Indexes. I. Subject index. II. Author index.