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The effects of Steinernema riobrave and composted animal manure mulches on the numbers of Tylenchulus semipenetrans in soil (A) and the mass density of citrus fibrous roots (B) on 2 February 2006, the numbers of 41-kg boxes of citrus fruit per plot on 2 June 2006 (C) and the numbers of adult citrus root weevils emerging from soil during one year beginning in October 2005 (D).
