Effect of Different Doses of Glufosinate-Ammonium 88% (Expert 88wdg) For Controlling Weed in Citrus Orchard

Abstract

M.Z. Rahman, M. S. Hossain, K. K. Bristy, F. Rahaman, M. M. Mia, A. S. Seajuti and H. M. K. Bashar

A field trial was conducted at the Fruit Research Farm of Bangladesh Agricultural Research Institute, Joydebpur, Gazi- pur, during the period from January to July 2020 to find out the optimum dose of herbicide to control weed in the citrus field. Five treatments i.e. T1: spraying of expert 88 WDG @ 2.5 g/litre of water, T2: spraying of expert 88 WDG @ 3.0 g/ litre of water, T3: spraying of expert 88 WDG @ 3.5 g/litre of water, T4: Two hand weeding at 25& 50 DAE (Days After Establishment) and T5: no spray (Control) was included in this study. Number of weed/m2 and weed control efficiency (WCE) was influenced by different treatments. Maximum (123 and 200) weeds/m2 was recorded in control plot at 25 & 50 DAE, respectively and minimum 27 weeds/m2 were recorded in T4 followed by T3 treatment (31 weeds/m2 ) respectively. The highest weed control efficiency 81.43% and 88.10% was found in T3 treatment at 25 DAE followed by T4 treatment (80.95% and 86.47%) in field-1 and field-2. The results revealed that spraying of herbicide (Expert 88 WDG @ 3.5 g/ litre of water) was most effective in controlling weeds up to 25-35 days of herbicide spraying. The herbicide action was shown quickly after spraying one day.

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