Some natural alternatives for controlling Meloidogyne incognita (kofoid and white)‎ chitwood under laboratory conditions

Abstract EN

Four untraditional materials were tested to control Meloidogyne incognita (Kofoid and White, 1919) Chitwood, 1949 juveniles under laboratory conditions, i.e.

magnetic iron, tourmaline, phosphate granules and saponins extract compared to traditional nematicide fenamifos (Nemacur® 40% EC).

These materials were tested at the concentrations of 500, 1000 and 2000 ppm directly against M.

incognita juveniles in Petri dishes and the results were obtained after 24 , 72 and 144 hr.

All tested materials showed nematicidal effect on nematode juveniles and their mortality increased with increasing concentration and exposure period.

Fenamifos was the most effective one on juvenile activity followed by saponins extract, phosphate granules, tourmaline, and finally magnetic iron.

Numbers of active juveniles were 50.00, 90.34, 260.67, 280.34 and 460.67 juveniles/1 ml, respectively compared to control which valued 850.11 juveniles/1 ml at the concentration of 2000 ppm after 144 hours of treatment.

On the other hand, fenamifos was the most effective one in inhibiting egg hatching followed by saponins extract, phosphate granules, tourmaline and magnetic iron in the concentrations 500,1000 and 2000 ppm after 144 hours of exposure.

Generally, the tested eco-friendly materials showed nematicidal effect on juveniles and eggs of M.

incognita under laboratory conditions and these materials should be tested under field or greenhouse conditions to show the effect on plant growth and nematode population.