ADVANCED STUDIES ON SOME ENDOPHYTIC MICROORGANISMS AND PLANT EXTRACTS TO CONTROL ROOT-KNOT NEMATODES

Document Type : Original Article

Authors

1 Prof. of Plant Physiology, Fac. of Agric., Menoufia Univ.

2 Prof. Head of Agricultural Botany, Fac. of Agric., Menoufia Univ.

3 Prof. of Nematology, Plant Pathology institute, Agric. Res. Centre, Giza.

Abstract

In this study four different plants were used i.e. Moringa, Cabbage, Cassia and Chinaberry   at different forms, concentrations and depths. The four plants under study used as chopped leaves as bio-fumigants. Results revealed that moringa at 4%. The lowest effect recorded with cassia 1%. The four plants were used as achopped leaves at 4% at three depths 5, 15, 30 cm against nematodes. Results revealed that the depth of 15 cm the best one in reducing the nematode population. the different four plants used as a leaves powdr at 1,2 and 4% of soil weight. Moringa at 4% the effective one in reducing nematode population. Using seeds powder of moringa and cabbage at different doses 1,2, and 4% of soil weight. Moringa seeds powder at 4% gave the highest effective one on reducing root-knot nematodes. Moringa oil was used to manage root-knot nematodes at different concentrations and different application types. Results showed that soil drench the effective typy in managing the nematode population at 2%. The four plants were used also with three different solvents under laboratory and greenhouse conditions. Results showed that moringa ethanol extract was the effective one either in vitro or in vivo . Eleven isolates of bacterial and six of fungal isolates were isolated from cabbage and moringa roots and seeds , identified and evaluated against  root-knot nematodes under laboratory and greenhouse conditions .Results found that the all bacterial and fungal isolates appeared effectiveness against egg hatching and larvae mortality in vitro and  nematode population in vivo. The integrated pest management carried out by using the effective treatment from each experiment to manage root-knot nematodes under greenhouse conditions. Results found that all treatments reduced all nematode parameters. Trichoderma spp. plus Bacillus cereus appeared a promising in managing root-knot nematodes

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