One microplot test and two field tests were conducted to study the reproduction, pathogenicity and control of Meloidogyne javanica (Treub.) Chitwood on sunflower (Helianthus annuus L.) In the microplot test, inoculum levels of 5, 25, and 125 eggs and/or second stage larvae of M. javanica per 100 cm soil increased 3-5 fold after 60 days. Plant dry weights at harvest, however, were not significantly different. In the field tests, phenamiphos, aldicarb, carbofuran, BAS 263-04-I, and fensulfothion in 20 cm bands increased sunflower growth and reduced populations of M. javanica. Phenamiphos at 3.0 kg a.i./ha was phytotoxic to the sunflower plants but not at 1.2 kg a.i./ha.
