Management of Meloidogyne incognita in cotton, using strains of the bacterium Gluconacetobacter diazotrophicus [Gossypium hirsutum L.]
2005
Bansal, R.K. (Haryana Agricultural Univ., Hisar (India). Dept. of Nematology) | Dahiya, R.S. (Haryana Agricultural Univ., Hisar (India). Dept. of Nematology) | Narula, N. (Haryana Agricultural Univ., Hisar (India). Dept. of Microbiology) | Jain, R.K. (Haryana Agricultural Univ., Hisar (India). Dept. of Nematology)
إنجليزي. Seven strains of the bacterium Gluconacetobacter diazotrophicus (formerly Acetobacter diazotrophicus) were assessed for their antagonistic efficacy against root-knot nematode (Meloidogyne incognita) infecting cotton in vitro and in planta. Cell free culture supernatant of the seven strains of G. diazotrophicus reduced egg hatching by more than 95% and exhibited a paralyzing effect on the infective juveniles of M. incognita within 24 hours. All the strains were found to excrete ammonia and volatile fatty acids during growth. Greenhouse screening of the bacterial strains indicated that all except strain 35-45 significantly enhanced the growth of nematode-infected cotton plants. These strains also reduced nematode multiplication to various extents, ranging from 36 to 69%. Evaluation of the two most effective strains in field for three years revealed that strain 35-47 persistently and significantly increased cotton yield and reduced root-knot index. Strain Co 99-70, although found to be effective in greenhouse, failed to produce responses in field
اظهر المزيد [+] اقل [-]إيطالي. [E' stata verificata l'attività antagonistica in vitro e in planta di sette ceppi del batterio Gluconacetobacter diazotrophicus (in precedenza Acetobacter diazotrophicus) nei confronti del nematode galligeno delle radici (Meloidogyne incognita) infestante il cotone. Il supernantante acellulare della coltura dei sette ceppi di G. diazotrophicus riduceva la schiusa delle uova di più del 95% e ha evidenziato un effetto paralizzante sulle larve infestanti di M. incognita entro 24 ore. Si è osservato che tutti i ceppi emettevano ammoniaca e acidi grassi durante la crescita. La verifica dei ceppi batterici in serra ha indicato che tutti i ceppi, eccettuato il 35-45, determinavano un aumento significativo della crescita di piante di cotone infestate dal nematode. Questi ceppi hanno pure ridotto la moltiplicazione del nematode in varia misura, dal 36 al 69%. La valutazione dei due ceppi maggiormente efficaci in campo per tre anni ha messo in luce che il ceppo 35-47 faceva aumentare persistentemente e significativamente la resa in cotone e riduceva l'indice galligeno. Il ceppo Co 99-70, sebbene efficace in serra, non ha fornito risposte in campo.]
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
المعلومات البيبليوغرافية
تم تزويد هذا السجل من قبل Istituto di Servizi per il Mercato Agricolo Alimentare
