Research Papers: Effects of Selected Volatile, Organophosphate and Carbamate Nematicides on Hatching, Infectivity and Development of Meloidogyne javanica
Hatchability of Meloidogyne javanica Chitwood 1949 eggs was completely suppressed by 12.5 and 25 ppm aldicarb, whereas these two concentrations of miral inhibited hatch by 98 and 99%, respectively. M. javanica egg hatch was reduced by 87% and 90% with 12.5 and 25 ppm DBCP. Aldicarb, miral and DBCP at 6.3 ppm inhibited egg hatch by 52, 96 and 68%, respectively; some eggs hatched after they were removed from the nematicides and placed in distilled water. A permanent irreversible suppression of hatching by as great as 91% was obtained with the lowest dosage of miral after eggs were transferred to distilled water. Pretreatment with DBCP and aldicarb appeared less suppressive and the latter nematicide was the least effective. Infectivity and development of newly-hatched larvae were reduced by 98 and 100% as a result of treatment with 6.3 ppm aldicarb. Substantial suppression of infectivity and development were also obtained with all miral concentrations; those effects were only slightly l
