A survey was conducted in 2014/2015 to study distribution of plant parasitic nematodes associated with the different vegetables, field crops, fruit trees, weeds and some ornamental plants grown in Borg El-Arab and Amryia counties (sugar beet district), North West Egypt. Data indicated that twelve nematode genera and species were found at various percentages frequencies of occurrence and population densities according to host type and locality. The most predominant nematode genera were root-knot, Meloidogyne; stunt, Tylenchorhynchus; spiral, Helicotylenchus and reniform nematodes, Rotylenchulus reniformis as they were recovered at the highest percentages frequencies of occurrence and population densities.
Abstract:The tested rates of chitin (2, 4 and 8 g/m 2 ) significantly (p ≤ 0.05 and 0.01) reduced the number of galls, egg masses, females and the second stage juveniles (J 2 ) in oilseed rape cvAD201 under field conditions. The plant growth parameters as length and weight of shoots increased at all rates of chitin compared to the untreated check. When using abamectin at the concentrations of 500, 1000and 1500 ppm, it significantly (p ≤ 0.05) reduced the above listed nematode criteria and enhanced the plant growth criteria.
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