Efficacy of Less Toxic Phytochemicals to Prevent the Insect Vector of <i>Mungbean Yellow Mosaic Virus</i> (<i>MYMV</i>)
- 1 Department of Plant Pathology, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh
- 2 Department of Plant Pathology, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh
- 3 Department of Plant Pathology, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh
- 4 Department of Plant Pathology, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh
- 5 Department of Plant Pathology, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh
- 6 Department of Plant Pathology, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh
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.
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