Reproduction of Root Knot Nematode (Meloidogyne Incognita) on Potential Tomato (Lycopersicum Esculentum) Cultivars and Breeding Lines

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S. B. Compala Luciana M. Villanueva


Two tomato cultivars and five (5) potential breeding lines from the Institute of Plant Breeding (IPB), UP at Los Banos, College, Laguna were evaluated under greenhouse conditions to determine the reproduction of root knot nematode, Meloidogyne incognita (Kofoid and White,1919). Reproductive factor (Oostenbrink, 1966) (Rf=Pf/Pi) was calculated for each cultivar/ breeding line. The breeding lines S602 and S610 supported lower population densities of M. incognita but they did not differ significantly with S611 and S608. The highest reproductive value was recorded in Apollo with 19.30; however, it was comparable to Anath and 20-05, with 15.30 and 15.17, respectively. Based on the criteria proposed by Robinson (1980) all the tomato cultivars and breeding lines tested are considered efficient hosts of M. incognita. However, additional trials are recommended to have more conclusive results.

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