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Indian Journal of Plant Protection
Year : 2000, Volume : 28, Issue : 2
First page : ( 139) Last page : ( 142)
Print ISSN : 0253-4355.

Evaluation of Sugarcane Germplasm for Red Rot Resistance with Special Reference to Yield and Quality of Cultivar CoC 671

Krishnamma K., Rao J.V.R. Bhupal

Sugarcane Research Station, Acharya NG Ranga Agricultural University, Vuyyur-521165, Andhra Pradesh, India.

Received:  20  July,  2000; Accepted:  27  September,  2001.

Abstract

Out of 62 accessions of sugarcane germplasm evaluated against red rot fungus (Physalospora tucumanensis Speg.), 32 accessions were found to be resistant to both the pathotypes cf 671 and cf 419. Among the resistant entries 83V15.86V96’, 89V74, 91V83, 92V221, 92V206, 93V297, 95V348, Co 86249, 87A397, 87A298 and 83R23 are agronomically promising. Ten entries showed moderately resistant and moderately susceptible reactions in plug method and resistant in nodal method. Remaining 20 proved to be either susceptible or highly susceptible in plug method. Some of them did not show any infection in nodal method and therefore have to be further tested in red rot endemic areas. Quantitative and qualitative losses due to the disease were estimated in comparison with healthy canes. There was marked reduction in single cane weight (41.8%) and juice sucrose (52.05%) whereas reducing sugars like glucose had increased (332.31%) in red rot affected canes over healthy.

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