ACTION OF SYSTEMIC NEMATICIDES IN CONTROL OF XIPHINEMA-INDEX ON GRAPE

  • 1 January 1981
    • journal article
    • research article
    • Vol. 13  (1) , 24-29
Abstract
In greenhouse tests using potted grape plants, 3 nematocides, aldicarb 10 G at 4.5 ai[active ingredient]/ha, phenamiphos 15 G at 22 kg ai/ha, and oxamyl liquid at 4.5 kg ai/ha, were tested against X. index on ''Thompson Seedless'' grape. Different timings for chemical treatments and X. index inoculations were used to determine some of the aspects of the mode of action. When nematodes and nematocides were applied simultaneously, nematodes were reduced from the intial 500 to the averages 5, 1 and 4, respectively, for aldicarb, phenamiphos and oxamyl. Similar counts (respectively, 3, 1 and 2) were obtained when the nematocides were added first and the nematodes added 14 days later. Nematode counts were 83, 112 and 1346 when nematocides were applied first, and 14 days later plants were washed free of soil, reported in untreated soil, and then inoculated. In untreated controls, the population increased to an average of 2703. Plant growth was inversely related to the level of nematode population resulting from the treatment.