Eight endoparasitic nematode species were recovered from 170 maize root samples in western Transvaal, Republic of South Africa. Pratylenchus zeae had the highest average population density (17,454/5 g roots), followed by P. neglectus (5,827/5 g roots), P. penetrans (5,617/5 g roots), P. brachyurus (3,060/5 g roots), Meloidogyne incognita plus M. javanica (301 juveniles/5 g roots), P. crenatus (...

Nonspecific esterases and malate dehydrogenases of 1-5 females from 40 root-knot nematode populations from Portugal were analyzed by electrophoresis in 0.4-mm-thick polyacrylamide gels. Fourteen major bands of esterase activity were detected, corresponding to 10 distinct phenotypes, Meloidogyne javanica and M. hapla had distinct species-specific phenotypes. Two phenotypes occurred in M. arenari...

Larvae of Meloidogyne spp. were readily infected with the endoparasite Bacillus penetrans by exposure to an aqueous suspension of spores from infected root-knot nematode females, or by passage of larvae through a shallow layer (50 cm(3)) of spore-infested soil. Infection severely reduced motility of second-stage larvae through soil. Bacillus penetrans exhibited a distinct host specificity in th...

Five sweetpotato [Ipomoea batatas (L.) Lam.] cultivars (‘Beauregard’, ‘Excel’, ‘Jewel’, ‘Hernandez’, and ‘Porto Rico’) were evaluated for resistance to three root-knot nematode species: Meloidogyne arenaria (Neal) Chitwood (race 2), M. incognita (Kofoid & White) Chitwood (race 3), and M. javanica (Treub) Chitwood. Resistance screening efficiency was assessed in both 400-cm3 square pots and 150-...

Toprak, bitki paraziti kök-ur nematodlarının çoğalmaları ve varlıklarını sürdürmeleri için iyi bir gelişme ortamıdır. Bu çalışmada, Gaziantep Osmaniye il ilçeleri sebze alanlarındaki Meloidogyne incognita, M. javanica, arenaria luci türleri ile bulaşık olan toprakların tekstürü (Suyla Doygunluk (%), pH’ı elektriksel iletkenliği (EC)) incelenmiştir. Çalışma sonunda dört nematodu türünün bulunduğ...

A giboma é uma hortaliça da família das solanácea originária África e muito cultivada neste continente emergente no Brasil. Os nematoides de galhas, gênero Meloidogyne, causam grandes prejuízos nas hortaliças, com destaque para as solanáceas. Assim, objetivou-se avaliar a influência concentração inóculo inicial M. javanica desenvolvimento giboma. Utilizou-se o delineamento inteiramente casualiz...

abstract in this study the effect of combination of trichoderma harzianum bi and salicylic acid were studied on root knot nematode (meloidogyne javanica) disease on tomato under green house conditions. the roots of tomato seedlings at six-leaf stage were inoculated with suspensions of fungal antagonist (106 conidia/ ml), 5mm salicylic acid and 2000 second-stage juvenile (j2). combined applicati...