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Population Changes of Heterodera glycines and Soybean Yields Resulting from Soil Treatment with Alachlor, Fenamiphos, and Ethoprop

By A. L. Bostian, D. P. Schmitt and K. R. Barker


The population dynamics of Heterodera glycines as influenced by alachlor, fenamiphos, and ethoprop alone and in herbicide-nematicide combinations were studied in the field. Numbers of H. glycines juveniles and eggs were higher at midseason and harvest where nematicides were applied. Fenamiphos alone or in combination with alachlor provided better control of H. glycines and greater seed yields than treatments with ethoprop. Numbers of H. glycines eggs at harvest in 1980 were positively correlated with numbers of juveniles at planting in 1981 and negatively related to seed yield in 1981

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Publisher: Society of Nematologists
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Provided by: PubMed Central
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