göze özdemir, fatma gül süleyman demirel üniversitesi - ziraat fakültesi - bitki koruma bölümü, Isparta, Türkiye , uysal, gülsüm süleyman demirel üniversitesi - ziraat fakültesi - bitki koruma bölümü, Isparta, Türkiye

Reaction of Different Inoculation Densities of Meloidogyne incognita race 2 on Some Resistant Pepper lines

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Reaction of different inoculation densities of two Meloidogyne incognita race2 isolates (G7 and K4) was studied on the root-knot nematode resistant pepper lines Carolina Wonder, PM217, CM334 and susceptible Yolo Wonder under controlled conditions (25±2°C temperature, 60±5% humidity and 16:8 photoperiodizm). Experiments were conducted on a randomized block design with 5 replications. Egg masses were used inoculum source and when the plants reached 4 real leaf seedlings, 1-5-10-20 and 50 egg masses were inoculated into the 2 cm depth of plant root zone. Peppers were harvested 9 weeks after inoculation and root gall ratio was indexed according to 0-5 scalae. Numbers of galls, egg masses and eggs in a roots were counted under light microscopy and reproduction fitness were evaluated. G7 and K4 isolates showed avirulent reaction in all inoculum densities in Carolina Wonder and CM334 resistant pepper lines. In the PM217 resistant pepper line. Reproduction fitness of G7 isolate was found 1.1 in the density of 50 egg masses and the durability of the pepper line is broken.10-20 and 50 egg mases inoculum densities of K4 isolate showed virulent reaction in the PM217 resistant pepper line. Reproduction fitness in these inoculum densities were 1.4, 3.5 and 4.4 respectively. The pathogenicity of both isolates in the Yolo Wonder pepper line was found to be high.

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Meloidogyne incognita race2 , pepper , resistance , virulence , inoculum density , pathogenicity

The Journal Of Ege University Faculty Of Agriculture

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