Effects of a fungus, Paecilomyces lilacinus on nodule formation and nematode infection on mungbean
1987
Davide, R.G. | Zorilla, R.A. (Philippines Univ., Los Banos, College, Laguna (Philippines))
Result of greenhouse experiments showed that Paecilomyces lilacinus applied alone and in combination with Rhizobium sp. was effective against root-knot nematode infection as counts. The control plants and those inoculated with Rhizobium alone showed moderate to severe gall index and higher gall counts. Paecilomyces lilacinus applied to mungbean without prior inoculation with Meloidogyne incognita eggs increased nodule formation by 78.61% which was comparable with the results obtained from the Rhizobium treatment. The plant without P. lilacinus and Rhizobium treatments and M. incognita inoculation had the lowest number of nodules. Mungbean plants inoculated with M. incognita eggmasses prior to P. lilacinus application had 100% increase in nodule formation. Same results were obtained from the combined Rhizobium and P. lilacinus treatment. Rhizobium application after inoculation of the root-knot nematodes did not induce nodule formation. Mungbean plants inoculated with eggmasses of M. incognita alone without either P. lilacinus and Rhizobium treatment did not form nodules. Field experiments showed that P. lilacinus used as seed-dip and as rice hull-rice bran soil mix treatments generally increased nodule formation by 36.56% and 49.10%, respectively. Better plant growth, yield and percentage nematode control were obtained compared with plants treated with Furadan 3G at 4.5 kg ai/ha. The untreated plants had the lowest percentage germination, nodule formation and yield. Nematode population in the soil also increased.
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