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United States Department of Agriculture

Agricultural Research Service

Research Project: REDUCING SOYBEAN YIELD LOSSES THROUGH GENETIC IMPROVEMENT

Location: Crop Genetics Research Unit

Title: Effects of metabolites of Gliocladium Roseum on egg hatch and juvenile mortality of Meloidogyne incognita

Authors
item Wang, Lifang -
item Xu, Yan-Li -
item Li, Shuxian
item Li, Chunjie -
item Xue, Allan -

Submitted to: Soybean Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: June 17, 2011
Publication Date: October 15, 2011
Citation: Wang, L., Xu, Y., Li, S., Li, C., Xue, A.G. 2011. Effects of metabolites of Gliocladium Roseum on egg hatch and juvenile mortality of Meloidogyne incognita. Soybean Science. 30:818-822.

Interpretive Summary: Root-knot disease caused by root-knot nematode (a microscopic-sized round worm) is a serious yield limiting factor for several economically important crops including soybean, vegetables, fruit trees, tea, tobacco, and medicinal plants. Control of nematode is currently mostly limited to application of soil nematicides, which are costly and detrimental to the environment and human health. There is a need for alternative management of the root-knot pathogen. The objective of this research was to assess the biocontrol potential of a fungus (mold) against the root-knot nematode. Results from this research showed that the fungal filtrate (liquid component secreted by the fungus) and its volatile metabolites (gas produced by the fungus) reduced nematode egg hatch by 80.4 and 41.4%, and increased juvenile mortality by 86.6 and 75.8%, respectively. This fungus can be used to control root-knot nematode.

Technical Abstract: Root-knot disease caused by root-knot nematode is a serious yield limiting factor for several economically important crops including soybean, vegetables, fruit trees, tea, tobacco, and medicinal plants. Control of nematode is currently mostly limited to application of soil nematicides, which are costly and detrimental to the environment and human health. There is a need for alternative management of the root-knot pathogen. The objective of this research was to assess the biocontrol potential of the G. roseum strain ACM941 against the root-knot nematode. Results from this research showed that the culture filtrate and volatile metabolites of G. roseum reduced nematode egg hatch by 80.4 and 41.4% and increased juvenile mortality by 86.6 and 75.8%, respectively. G. roseum can be used to control M. incognita.

Last Modified: 8/22/2014
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