Evaluation for Biomass Production Related Traits along with Impact of Weather Parameters on Insect-Pest Incidence in Sweet Sorghum Genotypes

摘要

Sweet sorghum [ Sorghum bicolor (L.) Moench] like Jatropha, Pongamia and sugarbeet is among the under exploited crops for biofuel (etha-nol and biodiesel) production. It accumulates directly fermentable sugars (10-20%) in the stalk and thus, has an advantage for producing grain for food and bioethanol from stalk juice without compromising food security under low-input production systems like less nitrogen requirement and water and is relatively more tolerant to drought and salinity hence, suitable for semi-arid climate. So keeping these in view eleven sorghum genotypes were evaluated alongwith five checks for resistance against insect pest for two successive years in relation to several weather parameters alongwith agronomic traits which affect biomass production directly and indirectly. ANOVA has indicated significant differences amongthe genotypes for all agronomic traits under s High GCV and PCV were reported for some ; nomic traits which indicate that the genotype formance could be reflected by the phenotype selection based on the phenotypic perform coulld be effective for traits under study. Cor tion analysis among agronomic traits evaluated ii study" showed positive and significant correl; among plant height, biomass yield and days to flowering. The significant positive correlc among these traits suggests that these traits c besimultaneously improved without any compe tory negative effects. As far as weather param are concerned, relative humidity and rainfall ha fected the insect population over both the yi Shoot fly incidences was increased with rise in tive humidity for bothyears i.e. the humid envi ment favor the time, adult longevity, potential fe dity and realized fecundity of the pest.