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Management of leaf rust of wheat caused by puccinia recondita f.sp. tritici rob. ex. desm.

KrishiKosh

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Title Management of leaf rust of wheat caused by puccinia recondita f.sp. tritici rob. ex. desm.
 
Creator Rajesh Kumar Patidar
 
Contributor I.K.Kalappanavar
 
Subject Plant Pathology
 
Description Evaluation of bread wheat genotypes against Puccinia recondita f.sp. tritici, crossing
of susceptible lines with resistant testers, evaluation of F1’s against leaf rust, identification of
slow leaf rusting varieties, diversity assessment among wheat genotypes, management of leaf
rust and impact of leaf rust on quality of wheat seed were studied during 2004-05 and 2005-
06 Rabi season at Dr. Sanjay Rajaram Wheat Laboratory, Main Agricultural Research
Station, Dharwad.
A unique trend of susceptibility was observed for leaf rust among bread wheat
genotypes depending on the disease pressure. Nearly 2/3 genotypes under natural conditions
and about ½ genotypes under leaf rust epiphytotic conditions were responded resistant
reaction against leaf rust.
The susceptible lines crossed with resistant testers resulted in the majority of F1’s
with resistance of resistant parent. However, plant height, number of productive tillers,
number of seeds per spike and spike length positively correlated with leaf rust resistance.
The genotype HD-2189 produced fewer rust pustules with less disease severity, low
rate of infection and lower AUDPC value was identified as slow ruster and genotypes DWR-
195 and DWR-162 were identified as fast rusters.
The wheat genotypes showed a complex divergence among themselves. Two
genotypes DL-784-3 and HP-1633 found most divergent from rest of genotypes, which
showed less similarity among them.
Fungicide propiconazole @ 0.1 percent found superior against leaf rust among
fungicides, among botanicals, neem leaf extract responded best and among bioagents,
Trichoderma harzianum performed better, while panchgavya among animal wastes and
products gave better results against leaf rust of wheat.
Grain quality was affected considerably by leaf rust. Propiconazole improved protein
content of the seeds significantly. Whereas, neem leaf extract and Trichoderma harzianum
improved sedimentation rate and panchgavya improved -carotene over control significantly.
 
Date 2016-10-24T19:04:37Z
2016-10-24T19:04:37Z
2006
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/81659
 
Format application/pdf
 
Publisher UAS, Dharwad