Plant-parasitic Nematodes on Soybean in South Carolina
AbstractFields in a concentrated area of soybean production in South Carolina were chosen for soil sampling to determine the distribution of plant-parasitic nematodes. Five hundred sampling sites were distributed over 19 counties according to county soybean acreage. Helicotylenchus and Scutellonema were identified most frequently from soil samples; together, these genera occurred in over 70% of the samples. Pratylenchus and Paratrichodorus were each observed in more than 60% of fields. Meloidogyne spp. were found in 27% of the fields and Hoplolaimus columbus in 14%. Rotylenchulus reniformis and Belonolaimus sp. each occurred in less than 10% of the fields. Tylenchorhynchus and Mesocriconema (Criconemella) were each present in over 40% of the fields, but numbers from each field were low. Of the fields sampled, 14% contained Heterodera glycines. Of these, 47% were race 14 and 32% were race 3. Races 9, 6, and 10 were also observed. Key words: Belonolaimus, Criconemella, Glycine max, Helicotylenchus, Heterodera glycines, Hoplolaimus columbus, Meloidogyne, Mesocriconema, nematode, Paratrichodorus, Pratylenchus, race, Rotylenchulus reniformis, sampling, Scutellonema, soybean, survey, threshold, Tylenchorhynchus.
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