POPULATION-DYNAMICS OF HETERODERA-GLYCINES AND SOYBEAN RESPONSE IN SOILS TREATED WITH SELECTED NEMATICIDES AND HERBICIDES

  • 1 January 1983
    • journal article
    • research article
    • Vol. 15  (3) , 432-437
Abstract
Two field experiments were conducted in 2 locations to determine the effects of the nematocides aldicarb, phenamiphos, and ethoprop and/or the herbicides alachlor, linuron or metribuzin on the population dynamics of H. glycines and soybean growth yield. Population densities of H. glycines were greater, at some time during the growing season, in several treatments with alachlor alone and in combination with nematocides. Numbers of H. glycines at harvest were greater in plots treated with aldicarb than in those treated with ethoprop or phenamiphos. The numbers in aldicarb treated plots were generally reduced when plots also received a herbicide. Soybean yields were negatively correlated with numbers of H. glycines eggs and juveniles in early to mid season but positively correlated with late season population densities.