Abstract
Abstract Carbofuran (2,3-dihydro-2,2-dimethyl-7 benzofuranyl methylcarbamate) at 5.7 and 11.1 kg/ha reduced soil populations of lesion (Paratylenchus penetrans, Filipjev & Shuurmans Stekhoven), pin (Paratylenchus sp. Cobb), and lance (Hoplolaimus galeatus, Cobb, Filipjeu & Schuurmans Stekhoven) nematodes. The highest rates of granular and flowable carbofuran were phytotoxic on peach [Prunus persica (L.) Batsch] planted just prior to treatment. In a subsequent experiment in soil previously planted to peach (old soil) or not previously planted to peach (new soil), trickle irrigation alone reduced dagger (Xiphinema americanum, Cobb) and lesion nematode populations. Carbofuran plus trickle irrigation reduced the dagger and lesion nematode populations and had the highest rate of tree growth in the old soil. Granular phenamiphos (ethyl-3-methyl-4-(methylthio) phenyl (1-methylethyl) phosphoridate) either alone or in combination with trickle irrigation reduced the stunt (Tylenchorhynchus claytoni, Steiner) nematode population. However, when phenamiphos was applied alone, tree growth was equal to the control in old soil but less than the control in new soil.
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