Titre :	Assessment of the environmental impact of pesticides in paddy rice production
Type de document :	texte imprimé
Auteurs :	A.W. Tejada, Auteur ; L.M. Varca, Auteur ; S.M.F. Calumpang, Auteur
Importance :	p 149-180
Langues :	Anglais (eng)
Catégories :	SCIENCES AGRICOLES
Mots-clés :	RIZ  PADDY  UTILISATION DES PESTICIDES  EVALUATION DES IMPACTS DES PRODUITS CHIMIQUES
Résumé :	Pesticides are biocides and their utility lies in their ability to kill noxious or unwanted organisms but they are selective. Most pesticides act by interfering with fundamental biochemical and physiological processes that are common to a wide range of pests and nontarget organisms. Assessing the hazards of pesticide use relies on a balance of evidence accumulated thriugh different lines of inquiry. Thresholds are set and codes of safe practice established on the basis of biochemical studies, toxicity test on a lilited number of organisms and field monitoring. Pesticide use in rice production has been suspected of being a major contributor to environmental pollution and farmers often spray hazardous insecticides five times in a cropping season when two applications may be sufficient . So this chapter reports the results of part of a multidisciplinary investigation to assess the environmental and health impacts of pesticides in ricefield ecosystems in the Laguna province of the Philippines, then addresses the on- and off-paddy effects of pesticides on rice plants, soil, paddy water , ricefield flora and fauna, groundwater and well water.
Numéro du document :	A 6290/H00 366
Niveau Bibliographique :	2
Bull1 (Theme principale) :	PROTECTION DES VEGETAUX
Bull2 (Theme secondaire) :	PROTECTION DES VEGETAUX-CONSIDERATIONS GENERALES

Assessment of the environmental impact of pesticides in paddy rice production [texte imprimé] / A.W. Tejada, Auteur ; L.M. Varca, Auteur ; S.M.F. Calumpang, Auteur . - [s.d.] . - p 149-180.
Langues : Anglais (eng)

Catégories :	SCIENCES AGRICOLES
Mots-clés :	RIZ  PADDY  UTILISATION DES PESTICIDES  EVALUATION DES IMPACTS DES PRODUITS CHIMIQUES
Résumé :	Pesticides are biocides and their utility lies in their ability to kill noxious or unwanted organisms but they are selective. Most pesticides act by interfering with fundamental biochemical and physiological processes that are common to a wide range of pests and nontarget organisms. Assessing the hazards of pesticide use relies on a balance of evidence accumulated thriugh different lines of inquiry. Thresholds are set and codes of safe practice established on the basis of biochemical studies, toxicity test on a lilited number of organisms and field monitoring. Pesticide use in rice production has been suspected of being a major contributor to environmental pollution and farmers often spray hazardous insecticides five times in a cropping season when two applications may be sufficient . So this chapter reports the results of part of a multidisciplinary investigation to assess the environmental and health impacts of pesticides in ricefield ecosystems in the Laguna province of the Philippines, then addresses the on- and off-paddy effects of pesticides on rice plants, soil, paddy water , ricefield flora and fauna, groundwater and well water.
Numéro du document :	A 6290/H00 366
Niveau Bibliographique :	2
Bull1 (Theme principale) :	PROTECTION DES VEGETAUX
Bull2 (Theme secondaire) :	PROTECTION DES VEGETAUX-CONSIDERATIONS GENERALES