Studies of alternaria black spot disease of pomegranate caused by Alternaria alternata in Punjab
Journal Title: Journal of Applied and Natural Science - Year 2017, Vol 9, Issue 1
Abstract
Alternaria black spot of pomegranate caused by Alternaria alternata pose significant economic losses in India as it reduce the crop yield. Farm survey was undertaken at Punjab Agricultural University, Pomegranate Research Block, Fruit Research Station, Jallowal- Lesriwal Jalandhar during 2015. Among all the five cultivars highest disease incidence (70%) and severity (30%) was registered in cultivar Bhagwa. Twenty two isolates of A. alternata were recovered from infected fruits and clustered using UPGMA (unweighted pair group method with arithmetic averages) on the basis of disease score produced in five cultivars (Ganesh, Ruby, Bhagwa, Jyoti and Mridula). It was revealed that five isolates namely AL14, AL15, AL20, AL21 and AL22 were highly virulent on almost all the pomegranate cultivars. Two cultivars viz. Bhagwa and Mridula were found to be most susceptible as 45.45 % isolates were found to be highly virulent on them.Thein vitro antifungal effects of the six fungicides on mycelial growth were investigated. Based on the inhibition of mycelial growth, all the fungicides showed most toxic reaction with 50% effective concentrations (EC50) of < 1 ppm. However, they varied in EC90 values. 10 ppm cocentration of Tilt (azole group) showed 90% effective concentration (EC90). Folicur also showed approximately same results as Tilt while EC90 value of Natio and SAAF was <25 ppm and > 20 ppm. However, two fungicides namely Dithane Z-78 and Bavistin showed less toxicity against Alternaria alternata as compared to other with EC90 value at concentrations <50 ppm and > 25 ppm. Azole group fungicides (Tilt and Folicur) were found most effective to inhibit the pathogen growth.
Authors and Affiliations
Adesh Kumar, Tanjeet Singh Chahal, Mundeep Hunjan Singh, Harminder Kaur, Roomi Rawal
Keywords
Related Articles
- EP ID EP286362
- DOI 10.31018/jans.v9i1.1164
- Views 97
- Downloads 0
Analysis of bioactive phytochemicals and evaluation of antioxidant activity of a medicinal plant, Boerhaavia diffusa L.
Boerhaavia diffusa L. (Family: Nyctaginaceae) commonly known as Punarnava is an herbaceous, spreading vine widely distributed in the tropical and subtropical regions in the world. The plants are a rich source of vitamins...
Entrepreneurial intention of undergraduate students of G. B. Pant University of Agriculture and Technology, Pantnagar
Entrepreneurship can positively impact human resource market by creating employment and economic opportunity, something that is of urgent need. Agriculture sector has immense untapped potential and huge busi-ness prospec...
Development of promiscous rhizobia for diverse rabi legumes (Chickpea, Pea and Lentil)
Conjugation between microsymbiont was used to create genetic variations in rhizobia for diverse rabi legumes (chickpea, pea and lentil) with better characteristics in nodulation and nitrogen fixation process. Ten antibio...
Morphological and Biochemical Analysis of Cicer arietinum L. under Paper Industrial Effluent Stress conditions
To study the effect of paper industrial effluent on chickpea (Cicer arietinum L.) along with different concentration (10%, 20% 40%, 60% 80% and 100%) and pure tape water as a control to compare the effect of paper indust...
RNA interference- a novel approach for plant disease management
RNA interference (RNAi) is an incredible revolution in the field of functional genomics, a breakthrough in plant molecular genetics. This technology will generate enormous potential for engineering control of gene expres...