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Plante de culture --- Crops --- Mauvaise herbe --- Weeds --- Herbicides --- Zone tropicale --- Tropical zones --- extension activities

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Weed management does not consist solely in the use of herbicides: other methods exist. The paper emphasizes the importance of evaluating weed ecology in understanding weed problems, the need to evaluate seed banks in the soil, the importance of evaluating weed competition and the ability of crops to compete with weeds. Also covered are troublesome weed problems including water hyacinth, and the risks and benefits of using transgenic herbicide-resistant crops.

Mauvaise herbe --- Weeds --- Mauvaise herbe aquatique --- Aquatic weeds --- Succession écologique --- ecological succession --- Dynamique des populations --- population dynamics --- Désherbage --- Weed control --- Herbicides --- Résistance aux produits chimiques --- Resistance to chemicals --- Lutte intégrée --- Integrated control --- Pays en développement --- Developing countries --- 632.51 --- 632.51 Weeds --- Herbicide resistance --- Water hyacinth --- Weed risk assessment --- Risk assessment --- Pest plants --- Weed plants --- Weedy plants --- Plant pests (Plants) --- Agricultural pests --- Botany, Economic --- Plants --- Eichhornia crassipes --- Hyacinth, Water --- Waterhyacinth --- Eichhornia --- Resistance to herbicides --- Pesticide resistance --- Control --- Effect of herbicides on

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Mauvaise herbe --- Weeds --- Identification --- identification --- Plantule --- Seedlings --- Zone tropicale --- Tropical zones --- Désherbage --- Weed control --- Flore --- Flora --- Afrique --- Africa --- Identification. --- AFR Africa --- duplicates available --- West Africa --- catalogue --- illustrations --- keys --- photographs --- weeds --- Pest plants --- Weed plants --- Weedy plants --- Plant pests (Plants) --- Agricultural pests --- Botany, Economic --- Plants --- identification.

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Plante annuelle --- Annuals --- Atriplex --- Ascochyta --- Agent pathogène --- Pathogens --- Herbicides --- Biopesticide --- Biopesticides --- Lutte biologique --- Biological control --- Photosynthèse --- Photosynthesis --- Nécrose --- Necrosis --- Relation hôte parasite --- Host parasite relations --- Compétition biologique --- Biological competition --- Mauvaise herbe --- Weeds --- Désherbage --- Weed control --- 632.51 --- 582.662 --- 632.937.1 --- Chenopodiaceae. Goosefoot. Fat hen. Orache. Spinach. Sugar beet --- Theses --- 582.662 Chenopodiaceae. Goosefoot. Fat hen. Orache. Spinach. Sugar beet --- 632.51 Weeds --- Chenopodium album --- Mycoherbicide

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Travail du sol conventionnel --- Conventional tillage --- Non-travail du sol --- Zero tillage --- Travail du sol de conservation --- Conservation tillage --- Fertilité du sol --- soil fertility --- Bilan hydrique du sol --- Soil water balance --- Mauvaise herbe --- Weeds --- Zone semi-aride --- Semiarid zones --- Stock semencier du sol --- soil seed banks --- Surveillance --- monitoring --- Fertilisation --- Fertilizer application --- Mulch --- Mulches --- Analyse coût avantage --- Cost benefit analysis --- République-Unie de Tanzanie --- United Republic of Tanzania --- 631.51 --- 631.559 --- 631.11 <678> --- Soil preparation and ploughing --- Harvest yield --- Farms, farm properties and farming systems--Tanzania --- Theses --- 631.11 <678> Farms, farm properties and farming systems--Tanzania --- 631.559 Harvest yield --- 631.51 Soil preparation and ploughing