Phytoparasitic Nematode Surveys of Arkansas Cotton Fields, 1986-1988
AbstractSurveys from 1986 to 1988 identified 22 phytoparasitic nematode species in Arkansas cotton fields. Meloidogyne spp. was found in ca. 15% of the fields sampled. Of these samples ca. 33% were found to have a population density of 106/100 cm³ of soil or more. Rotylenchulus reniformis was found in high numbers (5,000 +/100 cm³ of soil) in 1% of the fields sampled in 1988. Heterodera glycines was found in ca. 22% of the samples, presumably because of past cropping to soybean. Other common species found were Pratylenchus alleni, P. brachyurus, P. scribneri, Tylenchorhynchus ewingi, T. goffarti, Quinisulcius acutus, Helicotylenchus dihystera, H. pseudorobustus, Hoplolaimus magnistylus, Paratrichodorus minor, and Xiphinema americanum. Paratylenchus spp. juveniles were found in ca. 10% of the samples; adults of P. projectus and P. tenuicaudatus were found in ca. 1% of the samples. Other species found only rarely were Pratylenchus zeae, Merlinius brevidens, T. martini, Helicotylenchus multicinctus, Scutellonema brachyurum, and X. chambersi. Key words: Arkansas, cotton, crop loss estimate, Gossypium hirsutum, Helicotylenchus dihystera, Helicotylenchus pseudorobustus, Heterodera glycines, Hoplolaimus magnistylus, infestation estimate, Meloidogyne spp., Merlinius brevidens, Paratrichodorus minor, Paratylenchus projectus, Paratylenchus tenuicaudatus, Pratylenchus alleni, Pratylenchus brachyurus, Pratylenchus scribneri, Pratylenchus zeae, Quinisulcius acutus, Scutellonema brachyurus, survey, Tylenchorhynchus ewingi, Tylenchorhynchus goffarti, Tylenchorhynchus martini, Xiphinema americanum, Xiphinema chambersi.
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