EFFICACY OF IMITAF AND ACMIX TO PREVENT MUNGBEAN YELLOW MOSAIC VIRUS (MYMV)

Abstract

ABSTRACT A field experiment was conducted during March to June 2016 in the central farm of Sher-e- Bangla Agricultural University , Dhaka-1207.The main objective was to manage the mungbean yellow mosaic by controlling the insect vector whitefly using two selective insecticides namely Imitaf and ACmix. The experiment was conducted with BARI Mungbean-5.Different growth parameters, yield attributes and physiological features were significantly affected by application of selected insecticides with different number of spray. In case of Imitaf, the lowest disease incidence, per plant (10.12 %) and per plot (3.51 %), and disease severity (7.21%) was recorded in four times spray (T 4) at 70 DAS . The highest disease incidence, per plant (36.50 %) and per plot (11.37 %), and disease severity (23.33% ) was recorded in control treatment at 70 DAS . In case of ACmix, the lowest disease incidence, per plant (12.21 %) and per plot (4.21 %), and disease severity (7.53 %) was also recorded in T 4 at 70 DAS. The highest disease incidence, per plant (36.49 %) and per plot (11.37 %), and disease severity (36.67 % ) was recorded in control

at 70 DAS. The highest number of flower, no of pod and yield was also found in T 4 in case of Imitaf and ACmix. But the yield and yield contributing characterswas found to be better in imitaf than ACmixs. The highest chlorophyll content was recorded in four times spray(T 4) in both cases Imitaf (49.62µ mol m 1 -2 s -1 ) and ACmix (56.80 µ mol m ). The lowest chlorophyll content was recorded in T 0 in case of both insecticides application. However from the results of the study it was revealed that Imitaf had better efficacy to control the insect vectors (whitefly) of MYMV with four times spray.

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