Vol. 9, Issue 8 (2020)

Author(s):
Chitra K, Sheeba Joyce Roseleen S, PT Sharavanan and C Gailce Leo Justin

Abstract:
The resistance breeding is one of the ways to tackle disease incidence in plants and it requires continuous efforts of enriching the resistance mechanism against the diseases. In our investigations, field experiments were conducted to find out tolerant germplasm and land races against major disease of Paddy during 2015-16 and 2017-18. It was found that from the trial, IVT 3932 and IVT 3933 found no disease symptoms in 2015-16. Whereas AVT entry 1711 recorded no major diseases in the same year. Among the 37 IVT entries the highest per cent disease incidence was noticed in the entry 3936 (4.60 %). All other entries noticed below 4.6% disease incidence. Overall incidence of disease in the IVT, AVT and MLT trials were less. The maximum incidence of BLB 3.45 per cent was noticed in the entry 1702, the entries 1703 and 1717 recorded 4.24 & 4.0 % of leaf spot incidence respectively. Among the MLT entries, 506 recorded maximum incidence of blast (5.56 %), BLB (4.59 %) and leaf spot (4.67 %). Karudan samba and Kandavali had lesser incidence of blast, sheath blight, sheath rot, bacterial blight, falsesmut and brown spot. The maximum incidence of blast (4.13 %) was noticed in TRY 3 and the minimum incidence 0.86 % was noticed in Karudan samba.The maximum incidence of BLB was observed in the TN 1 (5.65 %) and TRY 3 (4.33%). All other entries noted minimum incidence when compared to check and TRY 3.