Management of legume pod borers on Yardlong bean (Vigna unguiculata subsp. sesquipedalis L.)

Abstract

Field experiments were carried out at Keladi Shivappa Nayaka University of Agricultural and Horticultural Sciences, Shivamogga, Karnataka, India, during kharif 2020 and 2021 on management of legume pod borers on Yardlong bean (Vigna unguiculata subsp. sesquipedalis L.). Results revealed that chlorantraniliprole 18.5 SC @ 0.4 ml/L was effective in reducing pod borers (89.11 %) and was on par with the spinetoram 11.7 SC @ 0.4 ml/L (88.17 %), followed by other chemicals evaluated. However, the pod borers populations were reduced in all the treatments compared to the control. The highest marketable pod yield was recorded in the chlorantraniliprole 18.5 SC @ 0.4 ml/L (24.23 t/ha) and it was closely on par with the spinetoram 11.7 SC @ 0.4 ml/L (24.06 t/ha). The efficacy and pod yield was superior in chlorantraniliprole 18.5 SC but, after analyzing the C: B ratio, spinetoram 11.7 SC recorded the highest C: B ratio of 1:4.71) as compared to the chlorantraniliprole 18.5 SC (1: 4.49). Hence, spinetoram 11.7 SC @ 0.4 ml per L was superior in pod borers reduction, increase in yield and C: B ratio.