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Nutrient imbalance indices are closely related with susceptibility ofpomegranate to bacterial blight disease

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Title Nutrient imbalance indices are closely related with susceptibility ofpomegranate to bacterial blight disease
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Creator Ashis Maity, Jyotsana Sharma, Ananta Sarkar, Amarja K. More, R.K. Pal
 
Subject Pomegranate,DRIS,CND,Nutrient imbalance indices, Bacterial blight disease
 
Description Not Available
Bacterial blight disease caused by Xanthomonas axonopodis pv. punicae is a major threat to pomegranatecultivation causing heavy losses. An attempt was made to establish nutrient sufficiency range for impart-ing moderate disease resistance and diagnosing nutrient imbalance causing disease development. Twoapproaches i.e. Diagnosis and Recommendation Integrated System (DRIS) and Compositional NutrientDiagnosis (CND) were considered to evaluate the nutrient balance status in pomegranate. Nutritionalsurvey revealed that concentration of Ca, Mg, Mn and Cu in leaves were significantly high in moder ately resistant germplasms, while N, K and S concentration were observed to be high in susceptible ones.Deficiency of Ca was observed as the cause of disease in 80% of the susceptible germplasms studied.The next important nutrient deficiencies in the susceptible germplasm were Cu (77.14%), Fe (77.14%),Mn (68.57%) and Mg (65.71%). Nutrient imbalance indices of susceptible germplasm diagnosed throughDRIS and CND had linear relationship (R2= 0.93 and R2= 0.82) with bacterial blight disease severity how-ever, DRIS approach is superior for diagnosis of nutrient imbalances. As per DRIS analysis, leaf nutrientstatus of N 1.56–2.05%, P 0.11–0.28%, K 0.83–1.20%, Ca 1.60–2.16%, Mg 0.38–0.82%, S 0.09–0.16% andmicronutrients viz. Fe 132.50–187.00 mg kg−1, Mn 31.60–58.40 mg kg−1, Zn 13.20–27.40 mg kg−1and Cu26.00–47.80 mg kg−1could result in imparting moderate resistance to bacterial blight disease. The nutri-ent norms were validated and found to have linear relation between nutrient imbalance indices andbacterial blight disease severity.
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Date 2020-08-26T11:06:11Z
2020-08-26T11:06:11Z
1001-01-01
 
Type Research Paper
 
Identifier Not Available
0190-4167
http://krishi.icar.gov.in/jspui/handle/123456789/40349
 
Language English
 
Relation Not Available;
 
Publisher Journal of Plant Nutrition