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Pathogenicity and management of root-knot nematode, Meloidogyne incognita (Kofoid & White) Chitwood, on Bt cotton

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Title Pathogenicity and management of root-knot nematode, Meloidogyne incognita (Kofoid & White) Chitwood, on Bt cotton
 
Creator Lalit Kumar
 
Contributor Verma, K.K.
 
Subject Bakery products, Antioxidants, Wheats, extraction, diseases, coffee, acidity, flours, biological phenomena, organic acids
 
Description Studies on pathogenicity and management of root-knot nematode, M. incognita were conducted
on Bt cotton hybrid (RCH-134) under screen house conditions at Department of Nematology, CCS
HAU Hisar, as the information on these aspects is lacking on Bt cotton. Pathogenicity was tested at
inoculum levels, i.e., 0 (non inoculated check), 500, 1000, 2000 and 4000 j2/kg soil in different soil
types such as loamy sand, sandy loam and sand. Under management studies, one aspect such as
locating the source of resistance was also carried out. The other aspect was for the achievement of
integrated nematode management of M. incognita in Bt cotton including various components of soil
treatments vizly, carbofuran @ 1 kg a.i./ha and neem cake @ 20 g/kg soil, while seed treatments were
carbosulfan (seed coating) @ 3.0 % a.i. w/w, seed soaking with carbosulfan @ 0.2 %,
Gluconacetobacter diazotrophicus strain 35-47, neem seed kernel powder (NSKP) @ 2.0 % w/w,
nimbicidin @ 2.0 % and Trichoderma viride @ 20.0 g/kg seed, either alone or in combination. Results
revealed that significantly highest plant growth and lowest nematode reproduction and multiplication
was obtained in sandy loam soil followed by loamy sand and sand. Plant growth parameters were
decreased significantly as inoculum levels increased from 500-4000 j2. Maximum plant growth and
minimum nematode reproduction was obtained in sandy loam soil at 500 j2. In screening, no resistance
was observed in any of thirty Bt cotton hybrids. All the hybrids showed susceptible or highly
susceptible reaction except three which were moderately resistant. Under management studies,
significantly highest plant growth was obtained in soil application with neem cake followed by
carbofuran and minimum nematode reproduction and multiplication in carbofuran followed by neem
cake. In case of seed treatments, maximum plant growth and minimum nematode reproduction was
obtained in carbosulfan seed coating followed by G. diazotrophicus strain 35-47 and T. viride. In
combination of soil and seed treatment, nematode multiplication was significantly reduced in soil
application with carbofuran and seed coating with carbosulfan or seed treatment with G. diazotrophicus
strain 35-47.
 
Date 2016-10-10T14:14:09Z
2016-10-10T14:14:09Z
2014
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/80366
 
Language en
 
Format application/pdf
 
Publisher CCSHAU