633449 : UMR Institut de génétique environnement et protection des plantes (UMR IGEPP) - Cote = 5.5.-RIC 633450 : UMR Institut de génétique environnement et protection des plantes (UMR IGEPP) - Cote = bureau V. Faloya A024082 : Bibliothèque générale d'Angers (Bibliothèque générale d'Angers) - Cote = PV ENN 1 (BG-25845) 633484 : UMR Institut de génétique environnement et protection des plantes (UMR IGEPP) - Cote = Bureau E-17 830646 : Bibliothèque générale de Rennes (Bibliothèque générale de Rennes) - Cote = 632.9 RIC
622776 : UMR Institut de génétique environnement et protection des plantes (UMR IGEPP) - Cote = DEG-655 633479 : UMR Institut de génétique environnement et protection des plantes (UMR IGEPP) - Cote = Bureau E-17
Localiser cette bibliothèque : - UMR IGEPP 622492 : UMR Institut de génétique environnement et protection des plantes (UMR IGEPP) - Cote = APBV-2006-17
OuvrageBioagresseurs. Méthodes d'appréciation du comportement variétal vis-à-vis des bioagresseurs
Résumé : The effects of shortage of agricultural labour, represented by direct-seeding technologies replacing transplanting, and of water scarcity, represented by limited water supply, on rice pests (pathogens, weeds and insects) were studied. The analysis was based on a field characterization data set...The effects of shortage of agricultural labour, represented by direct-seeding technologies replacing transplanting, and of water scarcity, represented by limited water supply, on rice pests (pathogens, weeds and insects) were studied. The analysis was based on a field characterization data set covering six sites in tropical Asia and several cropping seasons. Two-way ANOVAs and MANOVA were, respectively, used to test the effects of the two factors on individual rice pest injuries, and on the profile of injuries that an individual rice crop experiences over a cropping season. Fourteen injuries were considered, which individually were significantly (P<0.05) influenced by crop establishment (nine injuries), by water management (11 injuries), or their interaction (nine injuries). MANOVA indicated that rice injury profiles, regionally, were altered by both factors. The results suggested that injuries caused by some pests would be enhanced (e.g., brown spot (caused by Cochliobolus miyabeanus), planthoppers (including Nilaparvata lugens)) or reduced (e.g., stem rot (caused by Magnaporthe salvinii), sheath blight (caused by Rhizoctonia solani), rice whorl maggot (caused by Hydrellia philippina)) by crop establishment shifting from transplanting to direct-seeding. Water shortages, proxied in our data by poor water management, would favour some injuries (e.g., sheath rot (caused by Sarocladium oryzae), brown spot, neck blast (caused by Magnaporthe grisea), whiteheads (caused by stem borers including Scirpophaga incertulas and Chilo suppressalis)) or suppress others (e.g., stem rot, sheath blight). Very strong increases in weed infestation were observed with both direct-seeding and poor water management. The results are discussed with respect to pest management in rice