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article/chapitre/communication
J. Perry ; W. Parker ; L. Alderson ; S. Korie ; J. Bloodsmyth ; R. Mckinlay ; S. Ellis | 1998Populations of the mealy cabbage aphid, Brevicoryne brassicae (L.), on Brussels sprout plants, Brassica oleracea (L.) were sampled, fortnightly throughout the early season of 1996 in 2 ha(2) blocks. Sampling was done on two spatial scales, first[...]article/chapitre/communication
J. Perry ; L. Winder ; J. Holland ; R. Alston | 1999A new index and four new graphical displays, termed ''red-blue'' plots, are presented to study and measure clustering in spatially referenced count data. The index can detect clusters in the form of patches, comprising several nearby large count[...]