Vegetos

Abstract

Blast (Magnaporthe oryza) is considered as one of the most important biotic stresses limiting rice production. In the recent years due to uncertain climatic factors blast is affecting even the popular landraces known to be resistant over a period of time. Present study is focused on the effect of the disease on seed germination and growth rate. The pool consists of 85 varieties, which include 38 released varieties, 43 landraces and four check varieties (Tadukan and Tetep- Resistant checks, HR-12 and CO- 39 susceptible). The experiment was laid out in Completely Randomized Design (CRD) with three replications. Results showed that 12 varieties showed minimal influence of blast disease. Five varieties- BI-33, Sannamullu, Mysur sanna, Ugibhatta and Jeerigesanna were susceptible under field condition but found with minimum losses in germination and seedling growth test. Therefore, the results clearly indicate that minimum to moderate influence can be observed by blast disease during germination and seedling growth stages.