Nematicidal activity of fluensulfone compared to that of organophosphate and carbamate nematicides against Xiphinema index and Longidorus vineacola.

The nematicidal activity of fluensulfone against Xiphinema index and Longidorus vineacola was compared to that of organophosphate and carbamate nematicides. The number of X. index recovered via Baermann funnel from infested soil treated with fenamiphos or cadusafos at 2.0 and 4.0 mg l⁻¹ soil was higher than that recovered from untreated infested soil. The number of recovered X. index after fluensulfone treatment at these concentrations reflected the same level of that recovered from the control soil; however, a high percentage of the nematodes were immobilized after extraction. In experiments using fig plants in pots, the X. index population was much lower after treatment with fluensulfone vs. fenamiphos. Moreover, the nematode control efficacy of fluensulfone against X. index was much higher by pre-planting vs. post-planting application. Treatment of L. vineacola-infested soil with fluensulfone at 2.0 and 4.0 mg l⁻¹ soil slightly reduced the number of recovered nematodes in one of two trials, whereas fenamiphos and cadusafos did not reduce, and sometimes even increased the number of nematodes recovered from the soil. The nematode control efficacy of fluensulfone against L. vineacola was much higher than that of fenamiphos or oxamyl in pots with pepper plants. Again, pre-planting application of fluensulfone was more effective at reducing the L. vineacola population than post-planting application. The results suggest that fluensulfone can effectively control Xiphinema and Longidorus in the field, especially by pre-planting treatment. [ABSTRACT FROM AUTHOR]