S. S. Lakshman, D. K. Roy, Y. G. Sadkshari
Abstract: An experiment was carried out during December 2012-13 to 2014-15 under AICRP Sunflower, Nimpith Centre of Ramkrishna Ashram Krishi Vigyan Kendra Research Farm, South 24 Parganas, West Bengal, to identify the suitable sunflower hybrids for rabi-summer season in West Bengl. The field screening also carried out for sunflower wilt disease resistance in Sunflower in natural field condition. A total of 150 sunflower hybrids developed in AICRP-Sunflower, Nimpith and AICRP-Sunflower, UAS, GKVK, Bangalore were tested including the two National check hybrids namely, KBSH-44 and DRSH-1. Highly significant genetic differences were observed among the hybrids in plant height at harvest, head diameter per plant, seed weight per head, 1000-seed weight, and days to 50 % flowering, days to maturity, husk content ( %), volume weight (g/cc) and oil percentage and resistance/ tolerance to sunflower wilt. In the 1st year (2012-13), out of 150 sunflower hybrids, 13 nos. were superior hybrids were identified. The field observation reveals that the hybrid PSCHT-12-38 (2260 kg/ha, 36.0 % oil), PSCHT-12-42 (2250kg/ha, 37.5 % oil), PSCHT-12-26 (2217kg/ha, 37.7 %) and PSCHT-12-36 (2151 kg/ha, 37.9 % oil) were recorded higher seed yield as well as high oil content in comparison to the national check hybrids, KBSH-44 and DRSH-1. The field observation also reveals that the new experimental sunflower hybrids like PSCHT-12-42, SAHT-12-09, PSCHT-12-26, PSCHT-12-36, PSCHT-12-38, PSCHT-12-66, PSCHT-12-76 and PSCHT-12-29 were the superior sunflower hybrids for considerable high degree of tolerance to sunflower wilt (PDI score10-12.5 %) in comparison to the national check hybrids, KBSH-44 and DRSH-1 (PDI score 20-25 %). Considering the other yield attributing parameters like plant height, days to 50 % flowering or days to maturity, hull content and volume weight, the sunflower hybrids like PSCHT-12-38, PSCHT-12-42, PSCHT-12-26 and PSCHT-12-36 were observed the best performing sunflower hybrids due to their 7-10 days earliness and 30-50 cm shorter plant height at harvest coupled with good seed yield and oil yield as well as high degree of tolerance to sunflower wilt compare to other sunflower hybrids.
Keywords: Sunflower, Seed Yield, Oil Content, Wilt, West Bengal