Efficacy of Less Toxic Phytochemicals to Prevent the Insect Vector of <i>Mungbean Yellow Mosaic Virus</i> (<i>MYMV</i>)

Abstract

Planting material BARI mungbean-5 and two phytochemicals viz. Imitaf, active ingredient imidacloprid and ACmix, active ingredient chloropyriphos (50%) + Cypermethrin (5%) were used in this experiment. In case of Imitaf, the lowest percent disease incidence (10.12% per plant and 3.51% per plot) and severity (7.21%) were recorded in four times spray (T 4 ) at 70 DAS. The highest percent disease incidence (36.50% per plant and 11.37% per plot) and severity (23.33%) were recorded in no spray (T 0 ) at 70 DAS. In case of ACmix, the lowest percent disease incidence (12.21% per plant and 4.21% per plot) and severity (7.53%) were recorded in four times spray (T 4 ) at 70 DAS. The highest percent disease incidence (36.49% per plant and 11.37% per plot) and severity (36.67%) was recorded in T 0 at 70 DAS. The highest number of flower, no of pod and yield was found in four times spray (T 4 ) that was higher in Imitaf than ACmix. The highest chlorophyll content was recorded in four times spray (T 4 ) for Imitaf (49.62 µmol•m −2 •s −1 ) and ACmix (56.80 µmol•m −2 •s −1 ), and the lowest chlorophyll content was recorded in T 0 for Imitaf (42.01 µmol•m −2 •s −1 ) and ACmix (48.34 µmol•m −2 •s −1 ). However from the results of this experiment it was revealed that Imitaf gave the better performance to control the insect vector (Whitefly) of MYMV with four times spray.