Impact of Humic acid and organic amendments on Meloidogyne incognita in vitro condition Mohanapriya R., Jothi G.*, Poornima K.**, Swarnakumari N., Renukadevi P.1 Department of Nematology, Tamil Nadu Agricultural University, Coimbatore-641 003 (T.N.), India 1Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore-641 003 (T.N.), India *jothipugal@yahoo.co.in
**poornimamurtysista@gmail.com
Online published on 20 July, 2019. Abstract The effect of different formulations of liquid and granules humic acid and organic amendments of three oil cakes neem, groundnut and castor were studied on egg hatching, mortality of Meloidogyne incognita and penetration studies on M. incognita (J2) in cucumber plants. The study revealed that humic acid granules inhibit the egg hatching at 1% concentration after 24 hrs which showed the highest inhibition of hatching over control. Among the oil cakes, neem oil cake recorded the highest inhibition at 100% concentration after 24 hrs. In mortality test, humic acid liquid formulation (1% concentrations) at 72 hrs recorded 100% mortality, in neem oil cake at 100% concentration after 96 hrs showed 96% mortality. In penetration study, among the different formulation of humic acid, humic acid liquid formulation recorded the J2 penetration on 2nd day after inoculation and only 6% of nematode penetrated into roots. Among the oil cakes neem oil cake recorded the J2 penetration on 2 days after inoculation only 13% of nematode penetrated into roots compared to control. Top Keywords Humic Acid, Meloidogyne incognita, Organic amendments. Top |