Field screening of linseed, Linum usitatissimum Linn, genotypes against the incidence of budfly, Dasyneura I'mi Barnes and blight, Alternaria liniDey

摘要

Forty nine genotypes of linseed (Linum usitatissimum Linn.) were screened under natural infestation conditions against the incidence of budfly (Dasyneura lini Barnes) and Alternaria blight (Alternaria lini Dey) during five consecutive rabi seasons of1997-98 to 2001-02 at JNKW, Zonal Agricultural Research Station, Tikamgarh (M.P.). Entries, JLT-84-5-1, JLT-84-12-1, JLT-24, JLT-26, LMH-91-24 and LMH-16-5 (6.2-10%) reacted as resistant against the incidence of budfly on the basis of five years pooled mean, whereas, genotypes, 5610, EC-1392, RLC-29, JLT-84-12-1, LMH-43 and LCK-93-24 (4.2-4.9%) were highly resistant against the infestation of Alternaria blight. Grain yield was highest in genotypes, LMH-16-5 (2120 kg/ha) followed by LMS-5-38 (2116 kg/ha), JLT-90 (2092 kg/ha), JLT-24, JLT-84-5-1 (2056 kg/ha), Kangra local (2037 kg/ha), NL-97 (2032 kg/ha), LCK-9211 (2019 kg/ha) and JLT-26 (2005 kg/ha). Thus, four genotypes, LMH-16-5, JLT-24, JLT-84-5-1 and JLT-26 were resistant to both the pests as well as high yielding. Budfly susceptible genotype, LC-54 had longer blooming period (38 days) and budfly resistant genotypes, LMH-16-5 and JLT-26 had lesser blooming period (27-30 days). However, this behaviour did not correlate with all the genotypes.