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Journal of Zhejiang University SCIENCE B 2005 Vol.6 No.2 P.113~118

10.1631/jzus.2005.B0113


The effect of different initial densities of nematode (Meloidogyne javanica) on the build-up of Pasteuria penetrans population


Author(s):  DARBAN Daim Ali, PATHAN Mumtaz Ali, BHATTI Abdul Ghaffar, MAITELO Sultan Ahmed

Affiliation(s):  Faculty of Crop Proctection, Sindh Agriculture University, Tandojam, Pakistan

Corresponding email(s):   d_darban@hotmail.com

Key Words:  Pasteuria penetrans, Meloidogyne javanica, Densities, Population build-up


DARBAN Daim Ali, PATHAN Mumtaz Ali, BHATTI Abdul Ghaffar, MAITELO Sultan Ahmed. The effect of different initial densities of nematode (Meloidogyne javanica) on the build-up of Pasteuria penetrans population[J]. Journal of Zhejiang University Science B, 2005, 6(7): 113~118.

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author="DARBAN Daim Ali, PATHAN Mumtaz Ali, BHATTI Abdul Ghaffar, MAITELO Sultan Ahmed",
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%T The effect of different initial densities of nematode (Meloidogyne javanica) on the build-up of Pasteuria penetrans population
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%A BHATTI Abdul Ghaffar
%A MAITELO Sultan Ahmed
%J Journal of Zhejiang University SCIENCE B
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T1 - The effect of different initial densities of nematode (Meloidogyne javanica) on the build-up of Pasteuria penetrans population
A1 - DARBAN Daim Ali
A1 - PATHAN Mumtaz Ali
A1 - BHATTI Abdul Ghaffar
A1 - MAITELO Sultan Ahmed
J0 - Journal of Zhejiang University Science B
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Abstract: 
Pasteuria penetrans will build-up faster where there is a high initial nematode density and can suppress root-knot nematode populations in the roots of tomato plants. The effect of different initial densities of nematode (Meloidogyne javanica) (150, 750, 1500, 3000) and P. penetrans infected females (F1, F3) densities (F0=control and AC=absolute control without nematode or P. penetrans inoculum) on the build-up of Pasteuria population was investigated over four crop cycles. Two major points of interest were highlighted. First, that within a confined soil volume, densities of P. penetrans can increase >100 times within 2 or 3 crop cycles. Second, from a relatively small amount of spore inoculum, infection of the host is very high. There were more infected females in the higher P. penetrans doses. The root growth data confirms the greater number of females in the controls particularly at the higher inoculum densities in the third and fourth crops. P. penetrans generally caused the fresh root weights to be higher than those in the control. P. penetrans has shown greater reduction of egg masses per plant at most densities. The effects of different initial densities of M. javanica and P. penetrans on the development of the pest and parasite populations were monitored. And no attempt was made to return the P. penetrans spores to the pots after each crop so the build-up in actual numbers of infected females and spores under natural conditions may be underestimated.

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Reference

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[8] Stirling, G.R., 1981. Effect of temperature on infection of Meloidogyne javanica by Bacillus penetrans. Nematologica, 27:458-462.

[9] Stirling, G.R., 1984. Biological control of Meloidogyne javanica with Bacillus penetrans. Phytopathology, 74:55-60.

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[12] Tzortzakakis, E.A., Gowen, S.R., 1994. Resistance of a population of Meloidogyne spp. to parasitism by the obligate parasite Pasteuria penetrans. Nematologica, 40:258-266.

[13] Tzortzakakis, E.A., Channer, A.G.D.R., Gowen, S.R., Ahmed, R., 1997. Studies on the potential use of Pasteuria penetrans as a biocontrol agent of root-knot nematodes (Meloidogyne spp.). Plant Pathology, 46:44-55.

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