Screening of Hybrid and Inbreed Rice Varieties against Tungro Disease Inoculated with Viruliferous Green Leaf Hopper (Nephotettix virescens)

Five hybrid varieties namely BRRI Hybrid Dhan 2, BRRI Hybrid Dhan 3, Aloran, Jagoran, Shakti 2 and five Inbreed varieties namely BRRI Dhan 28, BRRI Dhan 29, BRRI Dhan 50, BINA 8 and BINA 10 were evaluated against incidence of rice tungro disease in pot condition. The effect of diseases on yield and yield contributing characters were also observed. The incidence of the disease varied significantly from one another. Among the hybrid varieties, Shakti 2 was recorded highly resistant to tungro disease where BRRI Hybrid Dhan 3 and Aloran were found highly susceptible. In case of inbreed varieties; BRRI Dhan 50 and BINA 8 were observed highly resistance to tungro disease where BRRI Dhan 29 was found highly susceptible. In this experiment every infected plant of both types of varieties (hybrid and inbreed) initiated lower number of tiller and panicle than untreated and uninfected plant with the increase of disease incidence which finally directly affects in yield.

Keywords:

Rice , Hybrid , Tungro Disease , Green leaf hopper