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Molecular variability, population dynamics and integrated management of Fusarium udum Butler causing pigeonpea wilt

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Title Molecular variability, population dynamics and integrated management of Fusarium udum Butler causing pigeonpea wilt
 
Creator P. S, Prasad
 
Contributor M, Saifulla
 
Subject diseases, fungi, pigeonpeas, genotypes, sowing, planting, biological development, pathogens, irrigation, biological phenomena
 
Description Pigeonpea is an important pulse crop grown for its dhal and ranks sixth
among legumes in area and production. It is a major source of protein to about
20 % of the world population and an abundant source of minerals and
vitamins. The main constraints in boosting the yield of the crop are its
susceptibility to diseases and insects. It is known to be affected by more than
hundred pathogens, among them important disease which affect the crop are
Fusarium wilt. Keeping this in view, 33 wilt affected plants were collected from
different geographical pigeonpea growing states of India viz., Andhra Pradesh,
Bihar, Karnataka, Madhya Pradesh, Maharashtra, Tamil Nadu, Uttar Pradesh
and West Bengal. The 33 Fusarium udum isolates were subjected to AFLP
marker for accessing the genetic variability existing among the isolates. The
isolates were grouped into four clusters. Among them, cluster II was the largest
group with 18 isolates, followed by cluster I comprises of eight isolates. Cluster
III had four isolates and cluster IV comprised three isolates. The highest
population density of F. udum (236.30 cfu/g of soil) was recorded at soil depth
of 0-10 cm. Incubation of F. udum infested soil samples from one to ten months
revealed that temperature range 25 to 30 0C at 75 per cent water holding
capacity was favourable for growth and multiplication of F. udum.
Thirty nine pigeonpea IVT and AVT genotypes, 15 genotypes of
multilocation trial and 50 promising genotypes evaluated for their performance
against Fusarium wilt. Out of which nine, four and 34 genotypes showed
resistant reaction respectively. Leaves, stems and roots of pigeonpea resistant
variety ICP 8863 had highest total sugar and phenol content compared to
moderately resistant variety BDN 2010. Carbendazim seed treatment @ 2g/Kg
of seed + T. viride soil application @ 2.5 kg /ha in FYM @ 50 kg / ha had
recorded lowest wilt incidence of 13.20 per cent and highest yield of 748.70
kg/ha. Among the intercrops tested, pigeonpea intercropped with sorghum
@1:2 recorded wilt incidence of 15.77 per cent and yield of 228.60 kg/ha.
 
Date 2016-05-26T11:04:23Z
2016-05-26T11:04:23Z
2011-11-18
 
Type Thesis
 
Identifier Th-9907
http://krishikosh.egranth.ac.in/handle/1/66335
 
Language en
 
Format application/pdf
 
Publisher University of Agricultural Sciences, Bengaluru