Effect of some indigenous plant materials and oilcake amended soil on the growth of tomato and root-knot nematode population.
Goswami B. K., Vijaylakshmi K.
Author Affiliation: Div. Nematol., Indian Agric. Res. Inst., New Delhi 110?012, India.
Annals of Agricultural Research 7 : 363-366
Abstract : In pot trials, 9 different plant extracts and 3 different oilcakes, each at 3% conc. (w/w), were tested against 1000 freshly hatched larvae of Meloidogyne incognita per 6-week-old seedling of tomato cv. Pusa Ruby. Fortyfive days after inoculation, the nematode population per 250 g soil was significantly reduced by all treatments; Eclipta alba (leaves), Cannabis sativa (whole plant), Carthamus tinctorius (oilcake) and Ricinus communis (leaves) were the most effective while Camellia sinensis (used leaves only) was not effective. The number of galls per gram root were reduced by all extracts especially Eclipta alba, Shorea robusta (oilcake) and Datura metel (leaves). Shoot length, shoot weight and root length were slightly decreased by C. sinensis and C. tinctorius but generally increased by all the other extracts especially Amaranthus sp., Calotropis gigantea, D. metel and E. alba. Chenopodium amaranticolor (leaves), Mangifera indicia (leaves) and Calophyllum inophyllum (oilcake) were also tested.