Abstract

Two economically important species of Citrus fruits viz., orange, Citrus reliculata and lemon, C. aurantifolia were selected for studying the changes in the population of plant parasitic nematodes around their roots. The nematode population of Hoplolaimus indicus, Helicotylenchus indicus, Xiphinema americanum, Pratylenchus coffeae, Tylenchulus semipenetrans and Hemicriconemoides mangiferae was observed at 10 cm (upper layer) followed by 20 cm (middle) and 40 cm (lower) depths. The population was higher at higher soil moisture level. Soil moisture and temperature directly affect the nematode population. The nematode population declined in drought conditions. The pH also indirectly affects the nematode population densities.

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