Abstract
The damaging potential of Alternaria alternata on different mungbean genotypes was accessed and its management was done
under in vitro and in vivo conditions through suitable fungicides. Seeds of fifty different mungbean genotypes were sown in
lines. There were fifteen replications for each line. The data on disease incidence and percent disease intensity were accessed
on all the genotypes. Infection was observed on all genotypes, none of them were found to be immune. Fourteen lines were
found to be the most susceptible (14114, 14117, 14128, 14198, 14203, 14205, 14250, 14265, 14266, 14295, 14305, 14306,
14368, 14438). Infection was observed on all genotypes, none of them were found to be immune. The maximum PDI (Percent
Disease Intensity) was recorded 35.30% while minimum was 2.43%. For detached leaf assay, the conidial suspension of
105
conidia/mLwas prepared and sprayed on detached leaves. The results revealed that maximum infection percentage was
observed in 14306, 14198 genotypes while minimum was observed in 14128, 14203. The lesion area was found to be maximum
in 14306, 14198 (0.23, 0.22) while minimum in 14128 (0.12) respectively. For management experiments, different fungicides;
Propiconazole (Tilt), Propineb (Antracol), Difenconazole (Score), Thiophanate methyl (Topsin M), Mancozeb (Dithane M45) were tested under in vitro and in vivo conditions. Significant decrease in mycelial growth with the increase in concentration
of fungicides was observed. Percent inhibition of mycelial growth was maximum in Propiconazole at its highest concentration
(1000 ppm) under in vitro conditions. A significant decline in disease incidence was observed as compared to control treatment.
The minimum percent disease incidence was recorded in Propiconazole (10.34) with PDC (67.31) while the maximum percent
disease incidence was observed in Thiophanate methyl (25.46). So, Propiconazole could be used successfully for the
management of A. alternata under field conditions.
Keywords: Association, mungbean, incidence, lesion, management
Hira Abbas, Muhammad Shah Nawaz ul Rehman, Tayyaba Shaheen. (2022) Detection of fungal pathogen, Alternaria alternata associated with mungbean and its management, Pakistan Journal of Agricultural Sciences, Volume 59, Issue 1.
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