Potential Nematicide Options for Reniform and Root-Knot Management

Terbufos was evaluated alone and in combination with avermectin for root knot (Meloidogyne incognita) and reniform (Rotylenchulus reniformis) nematode management in cotton.   Terbufos was tested at 4, 6, and 8 lb/a comparing it to aldicarb at 3.5 and 7 lb/a and the avermectin seed treatment.  In greenhouse trials, root knot numbers were reduced similarly by the terbufos, avermectic and aldicarb  nematicides with an average reduction of 94% as compared to the untreated control.  The reniform trials reduced reniform numbers similarly for terbufos at all rates, avermectic in combination with terbufos and aldicarb at the high rate.   This reduction in reniform numbers per gram of root averaged 95%.