International Journal of Plant Protection

Open Access Open Access  Restricted Access Subscription Access
Open Access Open Access Open Access  Restricted Access Restricted Access Subscription Access

Effect of Inoculum Density of Root Knot Nematode (Meloidogyne incognita) on Okra (Abelmoschus esculentus L.)


Affiliations
1 Department of Nematology, College of Agriculture, Orissa University of Agriculture and Technology, Bhubaneswar (Odisha), India
     

   Subscribe/Renew Journal


A pot culture experiment was conducted to find out the effect of different inoculum levels of nematode on the plant growth and nematode multiplication on okra plant. Findings revealed that significant reduction occurred in plant growth parameters viz., shoot length, ischolar_main length, fresh shoot and ischolar_main weight, dry shoot and ischolar_main weight of plant inoculated with 1000 juveniles and above per pot. The highest gall index and egg masses were also recorded at inoculums levels of 1000 and 10000, respectively. Nematode population in soil increased progressively with an increase in nematode inoculum level from 10 to 10000 J2/kg of soil. Maximum population was recorded at inoculum level of 10000 J2/kg of soil followed by 1000 J2/kg of soil which were statistically at par. The reductions in growth parameters and nematode infestations were found to be directly proportional to the inoculums level. Considering the spectacular decline in plant growth parameters and steep rise in number of galls and eggmasses in infected ischolar_mains caused by Meloidogyne incognita at the inoculum level of 1000 J2/kg soil and above, so it is considered that 1000 J2 M. incognita/kg soil happened to be damaging the thresh hold in okra.

Keywords

Okra, Meloidogyne incognita, Inoculums, Pathogenicity.
Subscription Login to verify subscription
User
Notifications
Font Size


  • Anamika (2015). Study on pathogenicity test of Meloidogyne incognita on different vegetable crops. J. Agric. Sci., 7 (3) : 105 - 110.

  • Barker, K.R. and Olthof, T. H. A. (1976).Relationship between nematode population densities and crop responses. Ann. Rev. Phytopathol., 14 : 327-353.

  • Das, P. (2013). Pathogenicity and management of ischolar_main knot nematode (Meloidogyne incognita) infecting chilli, M.Sc. (Ag.) Thesis, Orissa University of Agriculture and Technology, Bhubaneswar, ODISHA (INDIA).

  • Hussain, M.A., Mukhtar, T. and Kayani, M.Z. (2011). Assessment of the damage caused by Meloidogyne incognita on okra (Abelmoschus esculentus). J. Anim. & Plant Sci., 21(4) : 857-861.

  • Jain, R.K., Mathur, K.N. and Singh, R.V. (2007). Estimation of losses due to plant parasitic nematodes on different crops in India. Indian J. Nematol., 37(2) : 219-221.

  • Kayani, M.Z., Mukhtar, T. and Hussain, M.A.(2012). Evaluation of nematicidal effects of Cannabis sativa L. and Zanthoxylum alatum Roxb. against ischolar_main-knot nematodes, Meloidogyne incognita. Crop Protec., 39 : 52-56.

  • Khan, M.R. (2003). Life cycle, pathogenicity and management of ischolar_main-knot nematode, Meloidogyne incognita Race-2 infecting balsam (Impatiens balsamina L.). Indian J. Nematol., 33 (1) : 72-73.

  • Khan, T.A. and Hussain, S.I. (1989). Studies on the pathogenicity of Meloidogyne incognita and Rotylenchulus reniformis on cowpea (Vigna ungiculata var. Pusa Barsati). Pak. J. Nematol., 7:109-113.

  • Mahapatra, S.N., Swain, P.K. and Behera, B. (1999). Pathogenicity and management of ischolar_main - knot nematode, M. incognita in pointed gourd. Indian J.Agric.Sci., 69 : 275-277.

  • Mani, A. and Sethi, C.L. (1984). Pathogenicity and growth of chickpea as influenced by initial inoculum levels of Meloidogyne incognita. Indian J. Nematol., 14 : 41-44.

  • Mucksood, A.G., Rather, A.A. and Siddiqui, M.A. (2011). Pathogenicity of ischolar_main knot nematode Meloidogyne incognita on okra and its management through botanicals. Archiv. Phytopathol. & Plant Protec., 44 (17) : 1683-1688.

  • Mukhtar, T., Arshad, I., Kayani, M.Z., Hussain, M.A., Kayani S.B., Rahoo, A. and Ashfaq, M.(2013).Estimation of damage to okra (Abelmoschus esculentus) by ischolar_main-knot disease by Meloidogyne incognita. Pak. J. Bot., 45 (3): 1023-1027.

  • Nag Nathan, T.G. (1984). Studies on yield loss in vegetables due to Meloidogyne incognita.South Indian J. Hort., 32: 115-116.

  • Prasad, D. and Chawla, M.L.(1992). Pathogenicity of Meloidogyne incognita on sunflower, safflower and mustard. Curr. Nematol., 3(2): 127-132.

  • Rashid, M.H., Yasmin, L., Kibria, M.G., Millik, A.K.M.S.R. and Hossain, S.M.M. (2002). Screening of okra germplasm for resistance to yellow vein mosaic virus under field conditions. Plant Pathol. J., 1 : 61-62.

  • Sikora, R.A. and Fernandez, E. (2005). Nematodeparasites of vegetables. In: Luc, M., Sikora, R.A. and Bridge, J. (Eds). Plant parasiticnematodes in subtropical and tropical agriculture. 2nd Ed., CABI Publishing. pp.319-392.

  • Singh,V.K.,Singh,V.B. and Zalpuri, L.(2012). Survey, pathogenic effect and management of ischolar_main- knot nematode, Meloidogyne incognita on okra. Indian J. Nematol., 42 (2) : 161-168.

  • Triantaphyllou, A.C. and Hirschmann, H. (1960). Postinfection development of Meloidogyne incognita Chitwood, 1949 (Nematoda: Heteroderidae) Ann. Inst. Phytopathologique Benaki., 3 (1) : 1–11.


Abstract Views: 269

PDF Views: 1




  • Effect of Inoculum Density of Root Knot Nematode (Meloidogyne incognita) on Okra (Abelmoschus esculentus L.)

Abstract Views: 269  |  PDF Views: 1

Authors

J. K. Mahalik
Department of Nematology, College of Agriculture, Orissa University of Agriculture and Technology, Bhubaneswar (Odisha), India
N. K. Sahoo
Department of Nematology, College of Agriculture, Orissa University of Agriculture and Technology, Bhubaneswar (Odisha), India

Abstract


A pot culture experiment was conducted to find out the effect of different inoculum levels of nematode on the plant growth and nematode multiplication on okra plant. Findings revealed that significant reduction occurred in plant growth parameters viz., shoot length, ischolar_main length, fresh shoot and ischolar_main weight, dry shoot and ischolar_main weight of plant inoculated with 1000 juveniles and above per pot. The highest gall index and egg masses were also recorded at inoculums levels of 1000 and 10000, respectively. Nematode population in soil increased progressively with an increase in nematode inoculum level from 10 to 10000 J2/kg of soil. Maximum population was recorded at inoculum level of 10000 J2/kg of soil followed by 1000 J2/kg of soil which were statistically at par. The reductions in growth parameters and nematode infestations were found to be directly proportional to the inoculums level. Considering the spectacular decline in plant growth parameters and steep rise in number of galls and eggmasses in infected ischolar_mains caused by Meloidogyne incognita at the inoculum level of 1000 J2/kg soil and above, so it is considered that 1000 J2 M. incognita/kg soil happened to be damaging the thresh hold in okra.

Keywords


Okra, Meloidogyne incognita, Inoculums, Pathogenicity.

References