A quantitative greenhouse study with DBCP incorporated into soil infested with Meloidogyne arenaria showed that dosages of 74.4 L/ha or higher were necessary for effective control of the parasite. In field experiments during the 1975 and 1976 seasons with Florunner peanuts, it was found that when DBCP was sprayed and disked in at planting time in a 36 cm band 18.7 L/ha or more were necessary to attain the same degree of control of M. arenaria and yield response as was obtained with a chiselled application of the fumigant at 9.3 L/ha. A field study was made with water emulsions of DBCP 86 EC at concentrations of 9-100% (v/v), each emulsion applied at 9.3 L/ha. Maximal control of M. arenaria was obtained with emulsions containing 75% (7.0 L/ha DBCP) of DBCP, and maximal yields were obtained with emulsions containing 50% (4.6 L/ha DBCP) of the fumigant. In a separate field study, during the 1977 season, several rates of DBCP (9.3, 14.0, 18.7, 37.4, and 65.4 L/ha), applied 70 days after
