Effect of Verticillium chlamydosporium and Pseudomonas aeruginosa in the control of Meloidogyne javanica on tomato [Lycopersicon esculentum Mill. - Pakistan]

Efficacy of Verticillium chlamydosporium as a biological control agent of Meloidogyne javanica, the root-knot nematode, was tested under laboratory and field conditions. An ethyl acetate and hexane extract of V. chlamydosporium was lethal to M. javanica juveniles. V. chlamydosporium parasitized M. j...

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Veröffentlicht in:Nematologia mediterranea 2000-12, Vol.28 (2)
Hauptverfasser: Siddiqui, I.A, Ehteshamul-Haque, S. (Karachi Univ. (Pakistan). Dept. of Botany)
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Sprache:eng
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Zusammenfassung:Efficacy of Verticillium chlamydosporium as a biological control agent of Meloidogyne javanica, the root-knot nematode, was tested under laboratory and field conditions. An ethyl acetate and hexane extract of V. chlamydosporium was lethal to M. javanica juveniles. V. chlamydosporium parasitized M. javanica egg, whereas the female was unaffected. Neither egg nor M. javanica female were infected with Pseudomonas aeruginosa. V. chlamydosporium did not colonize the inner root tissue of tomato, whereas P. aeruginosa did. V. chlamydosporium and P. aeruginosa applied together had better biocontrol and promoted plant growth compared with either antagonists alone or the untreated controls [E' stata saggiata l'efficacia di Verticillium chlamydosporium come agente di controllo biologico di Meloidogyne javanica, il nematode galligeno delle radici, in condizioni di laboratorio e di campo. Un estratto in acetato di etile e in esano di V. chlamydosporium risultava letale per le larve di M. javanica. V. chlamydosporium parassitizzava le larve le uova di M. javanica, mentre la femmina risultava indenne. Ne' le uova ne' la femmina di M. javanica venivano infettate da Pseudomonas aeruginosa. V. chlamydosporium non colonizzava il tessuto radicale piu' profondo del pomodoro, al contrario di P. aeruginosa. V. chlamydosporium e P. aeruginosa applicati congiuntamente determinavano un controllo migliore e promuovevano la crescita delle piante rispetto sia a ognuno degli antagonisti da solo, sia ai controlli non trattati]
ISSN:0391-9749