Biocontrol Science and Technology (1996) 6, 175-188

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Jiuxu Zhang (1996)
Suppression of Fusarium colonization of cotton roots and fusarium wilt by seed treatments with Gliocladium virens and Bacillus subtilis
Biocontrol Science and Technology 6 (2), 175-188
Abstract: In a growth chamber at 25 C, the fungal antagonist Gliocladium virens colonized tap roots and secondary roots of cotton in non-sterile soil after seed treatment with preparations of G. virens. Colonization of tap roots by G. virens increased over time, and decreased with root depth. Seed treatments with G. virens strains G-4 and G-6 and with Bacillus subtilis strains GB03 and GB07 reduced the colonization of tap roots and secondary roots of cotton seedlings by Fusarium spp. Under greenhouse conditions, the same seed treatments suppressed the incidence and severity of fusarium wilt of cotton in soil infested with Fusarium oxysporum f. sp. vasinfectum and Meloidogyne incognita. Gliotoxin, produced by 'Q-group' strains of G. virens, inhibited F. oxysporum f. sp. vasinfectum in vitro. The seed treatments with G. virens strain G-6 and B. subtilis strains GB03 and GB07 did not affect the reproduction of root-knot nematodes. The results of this study may help to explain why the treatment of cotton seed with biocontrol agents often results in more vigorous and higher yielding plants, and indicate that there is potential for using G. virens and B. subtilis as seed treatments to control fusarium wilt of cotton.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Jiuxu Zhang

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
application technology

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Fusarium gossypinum Cotton (Gossypium)
Bacillus subtilis (antagonist) Fusarium gossypinum Cotton (Gossypium)
Trichoderma virens (antagonist) Fusarium gossypinum Cotton (Gossypium)
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