Ahmed El-Sayed Ismail - Plant Pathology Dept., Nematology Lab., National Research Center, Giza,۱۲۶۲۲, Egypt.
Susan Abd-Alazeem Hassabo - Plant Pathology Dept., Nematology Lab., National Research Center, Giza,۱۲۶۲۲, Egypt.

The effects of different water sources (distilled water, drainage water, ground water, Nile water, sea water and tap water) on infectivity, development and reproduction of Meloidogyne javanica and Rotylenchulus reniformis were evaluated under greenhouse conditions. Sea water was very toxic death to both nematodes and tomato plants. Water source did not affect rate of penetration for M. javanica or R. rotylenchulus. Final population of root-knot was highest for Ground water and lowest for Drainage water. Final population of reniform nematode was highest with Nile water and lowest with Drainage water. Nematode reproduction was correlated with the concentration of some cations such as Na+, Mg ++; and some anions i.e. Cl – and SO 4--. Root-knot nematode development and reproduction was higher with irrigation by ground water than the Nile water, distilled water or tap water treatments, however, the reniform nematode development and reproduction much higher when Nile water was used rather than the distilled water, tap water or ground water treatments. The root-knot nematode, M. javanica tolerated salinity of irrigation water more better than R. reniformis.

Root-knot nematode Meloidogyne javanica, Reniform nematode, Rotylenchulus reniformis