Zobrazeno 1 - 6
of 6
pro vyhledávání: '"D. L. Stacey"'
Publikováno v:
Clinical Journal of Sport Medicine. 15:396
Autor:
D. L. Stacey
Publikováno v:
Plant Pathology. 26:63-66
SUMMARY ‘Banker’ plants on which a whitefly/parasite interaction had been well established successfully controlled glasshouse whitefly (Trialeurodes vaporariorum (Westw.)) when introduced on to a commercial tomato crop at rates of 89 or 50 plants
Publikováno v:
Annals of Applied Biology. 108:219-231
SUMMARY Winter wheat fields on two farms in West Sussex were sampled in 1980 and 1981 for cereal aphids and their natural enemies. The grain aphid, Sitobion avenae was present in all 19 fields examined, but in no case did the populations increase to
Autor:
D. L. Stacey
Publikováno v:
Journal of Horticultural Science. 58:117-120
SummaryArtificial defoliation of tomato plants by removing more than half of each leaflet, detachment of whole leaves from the lower three-quarters of the plant or of two leaves between each truss, caused up to 40% yield loss. Removing a quarter of e
Publikováno v:
Journal of Horticultural Science. 60:517-523
SummaryTomato plants were subjected to varying levels of red spider mite damage at different stages in the growth of the plant. The progress of damage was manifested 38 days later in loss of numbers of fruits. It was found that the top 12 leaves were
Publikováno v:
The Journal of Applied Ecology. 24:907
(1) Enzyme-linked immunosorbent assay (ELISA) was used to detect aphid consumption by predators collected from three fields of winter wheat. (2) A total of 7781 predators belonging to 105 species was tested and 81 species were found to have eaten aph