Sampling predator/prey ratios to predict cumulative pest density in the mite - predatory mite system Panonychus ulmi - Typhlodromus pyri in apples.

W. van der Werf, J.P. Nyrop, J.M. Hardman

Research output: Contribution to journalArticleAcademicpeer-review

Original languageEnglish
Pages (from-to)41-51
JournalAspects of Applied Biology
Volume37
Publication statusPublished - 1994

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