The experiment was conducted in the consecutive two years 2016 and 2017 in the field conditions. As such, based on the overall mean values of two years' of investigations, the least percentage of dead-heart (1.87%) was recorded in case of Suraksha, followed by Kavya (4.50%), Lalat (5.59%), CR Dhan -303 (5.94%), CR Dhan -205 (6.77%), Sahbhagi Dhan (6.88%), CR Dhan -304 (7.02%) and Naveen (7.27%). These rice cultures were rated as promising and resistant against dead heart incidence, caused by YSB. The susceptible rice variety, TN-1 received the highest dead-heart amounting to 19.70 percent in the present studies based overall mean of two years' results. As such, based on the overall mean values of WE recorded during two years' investigations, the least percentage of white ear (3.16%) was noticed in case of Suraksha which remained at par with Kavya (4.34%), Akshay Dhan (3.46%), IR-20 (4.36%), IR-36 (4.50%), IR-64 sub-1 (4.64%) and followed by CR Dhan-304 (5.27%) CR Dhan -303 (5.78%), Lalat (6.66%) and Sahbhagi Dhan (9.63%) and all these rice genotypes received below 10 per cent white ear, caused by the stem borer, as against the highest incidence of WE was observed in the susceptible variety, TN-1 (22.71%) in the present studies. The test genotype could be arranged in descending order of: Ac Dhan (61.15 q/ha) > Advanta-801 + (59.30 q/ha) > CR Dhan -205 (52.58 q/ha) > CR Dhan -303 (51.16 q/ha) > Lalat (50.95 q/ha) > IR-36 (50.34 q/ha) > Abhisek (49.78 q/ha) in terms of grains yield and all these seven genotype remained statistically at par. TN-1 appeared as susceptible to yellow stem borer.

Aim: To assess yield loss in different rice varieties due to rice bakanae disease and to understand the role of weather parameters on disease incidence and losses. Methodology: Roving survey and surveillance was carried out for three consecutive years to assess the status of rice bakanae disease among twenty popular rice varieties growing in Eastern India. Field experiment was conducted for three successive years, i.e., 2016, 2017 and 2018 at Cuttack. Highly susceptible variety Pooja was selected for the experiment. Data on disease incidence was collected daily from 10 days after transplanting to harvesting stage and data were recorded at standard meteorological week. Correlation was performed to find the effect of different weather parameters on the incidence of bakanae disease on rice. Results: Disease being seed borne caused significant reduction in yield and quality. The maximum disease incidence was recorded in Pooja with 18.25, 28.50 and 40.25 per cent in three years. The same variety showed maximum yield loss of 35.26 per cent compared all other varieties. The data on relationship of bakanae disease incidence with weather parameters showed that the rainfall (-0.444) had significant negative correlation during 2018, while RH (0.525 and 0.606) had significant positive correlation during 2017 and 2018. Interpretation: This study gives some information for formulating breeding programs to develop resistant varieties and management measures for preventing Bakanae disease.

The experimental results of field screening of 20 rice genotype against gall midge revealed that, the overall mean values of silver shoot of the two years' of investigations, the least percentages of silver shoot (2.48% SS) was recorded in case of Kavya, which remained at par with those of BVS-I (2.94% SS), Suraksha (3.08%SS), and IR-36 (3.55%SS) followed by Akshay Dhan (3.89%SS), Lalat (3.99%SS), Naveen (4.88%SS), CR Dhan-303 (4.15%SS) and IR-20 (4.28%SS) all receiving below 5 percent silver shoot as against the highest incidence of 16.92 percent of SS in case of the susceptible variety, TN-I in the present studies As such considerably higher grain yields of rice grains were obtained. The test genotype could be arranged in descending order of: Achhay Dhan (61.15 q/ha) > Advanta-801 + (59.30 q/ha) > CR Dhan -205 (52.58 q/ha) > CR Dhan -303 (51.16 q/ha) > Lalat (50.95 q/ha) > IR-36 (50.34 q/ha) > Abhisek (49.78 q/ha) in terms of grains yields and all these seven genotype remained statistically at par and TN-1 appeared as susceptible to gall midge.