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Determination of the annual number of generations of Panonychus ulmi (Koch) (Acari: Tetranychidae) in apple trees


, : Determination of the annual number of generations of Panonychus ulmi (Koch) (Acari: Tetranychidae) in apple trees. Boletin de Sanidad Vegetal, Plagas 20(1): 165-172

In laboratory and field studies in apple orchards in Portugal, the number of generations per year of Panonychus ulmi was evaluated and the results are presented.

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