Effect on the growth and yield due to the aphid,Dactynotus sonchi Linn. in safflower

Abstract

Field experiments were conducted in paired plots to assess the losses due to Dactynotus sonchi Linn. in the yield of safflower in two successive winters 1977-78 and 1978-79. The percentage losses in the number of capitula per plant and in seed yield have been calculated and discussed. Excepting the secondary branches per plant, all the yield contributing characters and the seed yield showed significant differences in treated and untreated plots.