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C. Sankaranarayanan ¹, Rajeswari Sundarababu ²

Affiliations
1 Division of Crop Protection, Sugarcane Breeding Institute, Coimbatore 641007, Tamil Nadu, IN
2 Department of Nematology, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu, IN

Abstract

Glasshouse and micro-plot experiments were conducted to find out the influence of different application methods of arbuscular mycorrhizal fungus (AMF) Glomus mosseae such as seed pelleting, AMF mixed with soil and as a layer under seed, AMF soil pelleting, and direct application of spores against ischolar_main-knot nematode Meloidogyne incognita on black gram (Vigna mungo). In both experiments, application of G. mosseae to black gram plants suppressed M. incognita soil population by up to 14-49% under pot culture and 35-46% reduction over nematode alone treatments. Variations among different application methods of AMF were observed in terms of plant growth and suppression of the nematode population. Among the methods tested, AMF mixed with soil recorded least gall index (2.8 and 2.2 in pot culture and micro-plot, respectively) and nematode population, (290 and 280/200g soil in pot and micro plot condition, respectively).

Keywords

Arbuscular Mycorrhizal Fungi, Biological Management, Inoculation Methods, Meloidogyne incognita, Vigna mungo.

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G. Jothi ¹, Rajeswari sundarababu ¹

Affiliations
1 Department of Nematology, Tamil Nadu Agricultural University, Coimbatore 641 003, Tamil Nadu, IN

Abstract

Studies were conducted to observe the development of peroxidase and chitinase activity in brinjal cv.Co-2 inoculated with Vesicular arbuscular mycorryzae (VAM) and the ischolar_main knot nematode, Meloidogyne incognita. Peroxidase activity was increased and a decrease in chitinase activity was observed which is a defense mechanism of the host lo invading pathogen.

Keywords

Chitinase, Meloidogyne incognita, Peroxidase, VAM.

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C. Sankaranarayanan ¹, Rajeswari Sundarababu ¹

Affiliations
1 Department of Nematology Tamil Nadu Agricultural University Coimbatore 641003, Tamil Nadu, IN

Abstract

Influence of moisture and pH on the efficiency of VA-mycorrhiza, Glomus mosseae against Meloidogyne incognita on blackgram was studied under potted conditions. The moisture level of 40 to 70 per cent was found suitable for the mycorrhizal colonization and unfavourable for nematode multiplication. Among the moisture levels tested 70 per cent moisture was found suitable for the well establishment of VAM to control ischolar_main knot nematode. ffigher moisture level (80-100%) was found detrimental to VAM fungus and due to poor establishment of VAM it resulted in increased nematode population. Among the different pH levels tested for interaction studies, pH7 was suitable for better mycorrhizal colonization and spore production.

Keywords

Biocontrol, Blackgram, Glomus mosseae, Meloidogyne incognita, Moisture, pH.

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G. Jothi ¹, Rajeswari Sundarababu ¹

Affiliations
1 Department of Nematology Tamil Nadu Agricultural University Coimbatore 641 003, Tamil Nadu, IN

Abstract

Effects of vesicular arbuscular mycorrhizal fungi and crop rotation with pearl millet and green gram were investigated in microplots for the management of ischolar_main - knot nematode. VAM fungi increased the yield and stimulated the growth of brinjal. The nematode population was decreased from 143 nematodes /200ml soil to 105 nematodes/200ml soil after the rotation with green gram and pearl millet.

Keywords

Brinjal Crop Rotation, Green Gram,G. mosseae, Meloidogyne incognita, Pearl Millet.

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