Authors: DUFFIELD SJ BRYSON RJ YOUNG JEB SYLVESTERBRADLEY R SCOTT RK

Citation: Sj. Duffield et al., THE INFLUENCE OF NITROGEN-FERTILIZER ON THE POPULATION DEVELOPMENT OFTHE CEREAL APHIDS SITOBION-AVENAE (F) AND METOPOLOPHIUM-DIRHODUM (WLK) ON FIELD-GROWN WINTER-WHEAT, Annals of Applied Biology, 130(1), 1997, pp. 13-26

Authors: DUFFIELD SJ JEPSON PC WRATTEN SD SOTHERTON NW

Citation: Sj. Duffield et al., SPATIAL CHANGES IN INVERTEBRATE PREDATION RATE IN WINTER-WHEAT FOLLOWING TREATMENT WITH DIMETHOATE, Entomologia experimentalis et applicata, 78(1), 1996, pp. 9-17

Authors: DUFFIELD SJ AEBISCHER NJ

Citation: Sj. Duffield et Nj. Aebischer, THE EFFECT OF SPATIAL SCALE OF TREATMENT WITH DIMETHOATE ON INVERTEBRATE POPULATION RECOVERY IN WINTER-WHEAT, Journal of Applied Ecology, 31(2), 1994, pp. 263-281

Authors: DUFFIELD SJ

Citation: Sj. Duffield, TRICHOGRAMMA EGG PARASITISM OF HELICOVERPA-ARMIGERA ON SHORT-DURATIONPIGEONPEA INTERCULTURED WITH SORGHUM, Entomologia experimentalis et applicata, 72(3), 1994, pp. 289-296