Influence of growth stage on sensitivity to helminthosporol toxin of Bipolaris sorokiniana of barley (Hordeum vulgare)

B M Bashyal; Ramesh Chand; L C Prasad; A K Joshi

doi:10.56093/ijas.v82i8.23063

Authors

B M Bashyal Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh 221 005 India
Ramesh Chand Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh 221 005 India
L C Prasad Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh 221 005 India
A K Joshi Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh 221 005 India

https://doi.org/10.56093/ijas.v82i8.23063

Keywords:

Barley, Bipolaris sorokiniana, Growth stage, Helminthosporol

Abstract

Fourteen barley genotypes were tested in field condition for their reaction to helminthosporol toxin of Bipolaris sorokiniana of barley at third node detectable, beginning of flowering and medium milk stage. Appearance of necrotic symptom was highly influenced by growth stage of genotypes. Symptom appeared early in medium milk stage (GS 75) and it took maximum time at third node detectable stage (GS 33). RD2503 has taken three days and BCU3839 has taken 14.8 days for the necrotic symptom at growth stage 75. Further percentage of infiltered area also increased at growth stage 75 compared to other stages. Growth stage 75 identified as most appropriate growth stage for the screening of barley genotypes to helminthosporol.

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