Background: Pigeonpea is an important legume crop in the world. The diseases Fusarium Wilt (FW) and Sterility Mosaic Disease (SMD) causes a complete yield loss i.e. up to 100% in susceptible pigeonpea genotypes. Amidst of these conditions the selection of stable resistant genotypes against these diseases under varying environmental conditions is the primary management choice for minimizing yield losses (Sharma et al., 2012; Bhaskar et al., 2016).
Methods: Fifty pigeonpea genotypes were evaluated against Fusarium wilt and SMD in artificial epiphytotic conditions during four Kharif seasons i.e., 2017, 2018, 2019 and 2020. Additive main effects and multiplicative interaction (AMMI) analysis was used to decipher the interaction between genotype (G) and environment (E) for FW and SMD in pigeonpea. Result: Analysis revealed that in both the diseases IPCA1 and IPCA2 collectively contributed more than 80% interaction. AMMI biplots revealed that Kharif- 2019 shows positive effect to FW disease and negative effect to SMD. The AMMI model integration with GGE biplot, identified stable and resistant genotypes (1, 6, 7, 9, 11, 14, 20, 25, 21, 30, 33, 35, 42, 44, 46, 47, 48 and 49) to both FW and SMD based on their performance across diverse environments. These genotypes will be referred for pigeonpea FW and SMD disease resistance breeding programmes.
Quality assessment was carried out at 36 sites of Barkagaon Block of Hazaribag district. With reference to three different sources of potable water (i.e. 108 samples) different water parameters analysis was done in view of fluoridation. It reveals that out of 108 samples were fluoride observed in only 9 samples, in % contribution, the fluoride level zero (0) was observed in 91.67% while more than zero (0) was confirmed in 8.33% of water sample ranging in between 0.4-6.5 mg/ L. Lowest fluoride sites was Napokhurd and highest was Gali in the Barkgaon Block. Dental fluorosis cases were also observed at the study area, as per Dean’s index. A correlative studies of different water parameters and fluoride indicated –ve relation with pH (r= -0.28), alkalinity (r=-0.21), total hardness (r= -0.02) and Calcium(r=-0.65), while +ve correlation was observed with temperature(r=+0.23) ,TDS (r=0.1) , chloride (r=0.25) and magnesium (r=0.62).
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