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Subject: Plant Pathology × Author: Angadi, Sunil × End date: 2016 × Start date: 2016 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Biochemical and Nutrient Status in Chickpea Due to Powdery Mildw (Leveillula taurica (Lev.) Arnaud)
    (University of Agricultural Sciences, Dharwad, 2016-06) Angadi, Sunil; Basavarajappa, M.P.
    Powdery mildew of chickpea caused by Leveillula taurica (Lev.) Arn. is a major menace for chickpea cultivation in recent years. The present investigation was conducted at Regional Agricultural Research Station, Vijayapur during Rabi 2015-16, As the days advanced from 63 to 91 DAS, the mean total chlorophyll content in healthy leaves (0.626 mg g-1) as compared to diseased leaves (0.462 mg g-1) the chlorophyll-a, chlorophyll-b and total chlorophyll contents were remarkably reduced. Similarly total mean phenol content in healthy (3.52 mg g-1) as compared to diseased (2.06 mg g-1) and found gradual increase in phenol content in both healthy and diseased leaves. Total mean of sugar content in healthy leaves (2.57 mg g-1) as compared to diseased leaves (2.20 mg g-1). Total mean protein content in healthy leaves (6.33 mg g-1) as compared to diseased leaves (5.04 mg g-1). Total mean of free amino acids in healthy leaves (1.12 mg g-1) as compared to diseased leaves (0.74 mg g-1) and these found gradual decrease in both healthy and diseased leaves. With respect to nutrient analysis it is found a highly negative correlation between N, P, K, Mg, Zn, Mn, Cu and disease intensity, whereas a highly positive correlation was observed between Fe, B, and disease intensity. The healthy leaves had higher concentration of N, P, K, Mg, Zn, Mn and Cu and fewer amounts of Fe and B. For the management of powdery mildew of chickpea new fungicide molecules were evaluated under natural epiphytotic conditions at ARS, Annigeri. Among nine chemicals tested myclobutanil @ 0.02 % and azoxystrobin @ 0.05 % found effective in managing the disease cent per cent and also recorded comparatively more yield. Myclobutanil showed maximum BCR than azoxystrobin and also found to be effective in managing powdery mildew of chickpea.