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The author has found that the stages in the ovarian cycle of female of Hylemya (Erioischia) brassicae (Bch.) can be numbered in a similar way to that ...Read more
Life tables for populations of Hylemya (Erioischia) brassicae (Bch.) on cabbage crops in Canada [cf. RAE/A 60, 538] and England [50, p. 286] are analy...Read more
The effect of cover (intersown clover or lettuce or artificial material) on egg populations of Delia brassicae (Wied.) on cabbage crops was investigat...Read more
The occurrence of enemy-free space presents a challenge to the top-down control of agricultural pests by natural enemies, making bottom-up factors suc...Read more
A marking method for Hylemya (Erioischia) brassicae (Bch.), in which the flies were fed on a sucrose solution containing radioactive phosphorus (32P) ...Read more
The presence of weeds within the crop provided a habitat which was more suitable for some of the arthropod predators of P. rapae. Harpalus rufipes was...Read more
The adult life-span and the factors affecting egg production in Pieris rapae (L.) (especially age, temperature and solar radiation) were investigated ...Read more
The following is based largely on the author's summary. During investigations in Britain in 1968 on the effect of weed control on the incidence of Pie...Read more
The following is virtually the authors' summary. The dispersal of a population of Hylemya (Erioischia) brassicae (Bch.) was studied in Oxfordshire ove...Read more
Adults of Hylemya (Erioischia) brassicae (Bch.) labelled with 32P were released 24 m from a plot of cabbage and recaptured with water traps. The respo...Read more