Evaluation the efficiency of some controlling methods on olive seedlings infected with root-knot nematodes Meloidogyne spp.

Abstract

The study was aimed to evaluate different controlling methods and agents including the nematicide Rugby, the bio-agents Trichoderma.harzianum and Trichoderma.atroviride, compost of poultry manure, cows and sheep dung. These agents were compared for their effect on nematode populations and plant growth parameters of olive infected plant. The results revealed that Rugby was the most effective treatment that decreased all measured criteria of nematode infection including gall number / 2 g root, Female number / 2 g root, number of egg masses/2g root and number of males and juveniles/100g soil which recorded 0.33/2g root, 0.33/2g root, 0.33/2g root, 0.00/100g soil respectively. The highest values of some plant growth parameters including plant height, root length, number of branches/plant and leaf area/plant were gained from treated with the poultry manure treatment that resulted in 32.66cm2, 34.00cm2, 22.88g, 7,00 branch/plant and 5.37cm2 respectively. Among all treatments compost of poultry manure, cow dung and sheep dung had increased biochemical indicators of plant health such as percentage of nitrogen content (1.93, 1.93, 1.89)% portion content(12.07, 12.07, 11.8)% and chlorophyll a, b and total chlorophyll content (0.604, 0.503, 0.488), (0.302, 0.258, 0.244), (0.906, 0.671, 0.732) mg/g fresh weight respectively.