Integrated Weed Management in Turmeric (Curcuma longa)
Md. Riazul Islam *
Regional Spices Research Centre, Bangladesh Agricultural Research Institute, Magura- Post code: 7600, Bangladesh.
Md. Atikur Rahman
Spices Research Centre, Bangladesh Agricultural Research Institute Shibganj, Bogra- Post code: 5810, Bangladesh.
Abu Hena Faisal Fahim
Spices Research Centre, Bangladesh Agricultural Research Institute Shibganj, Bogra, Post code: 5810, Bangladesh.
Shahriar Hasan
Department of Agricultural Extension and Rural Development, Bangabandhu Sheikh Mujibur, Rahman Agricultural University, Gazipur 1706, Bangladesh.
Fardus Ahamed Nasim
Training and Communication Wing, Bangladesh Agricultural Research Institute, Bangladesh.
Hasib Bin Saif
Planning and Evaluation Wing, Bangladesh Agricultural Research Institute, Bangladesh.
Abu Jafor Mohammad Obaidullah
Regional Spices Research Centre, Bangladesh Agricultural Research Institute, Magura- Post code: 7600, Bangladesh.
Tahera Tasmima
On Farm Research Division, BARI, Tangail, Bangladesh.
Md. Abul Kalam Azad
Soil Resource Development Institute, Daulatpur, Khulna, Bangladesh.
*Author to whom correspondence should be addressed.
Abstract
The experiment was conducted at Regional Spices Research Centre, BARI, Magura during the cropping season of 2021-22 and 2022-23 to find out the best management practices for controlling the weed of turmeric. The experiment was laid out in a randomized complete block design with three replications. Nine different treatments and a control plot were studied. Significant differences regarding yield and yield attributes were observed among different treatments. The results revealed that Cyperus rotundus was the major weed constituting 51% of the total weed flora. All treatments brought significant reduction in the count of weeds over control. The lowest number of these weeds was recorded in glyphosate @ 10 ml/L+ 1 HW at 70 DAP + straw mulch @ 5 t/ha treated plot. The highest fresh yield (64.63 t/ha in 2021-22 and 58.28 t/ha in 2022-23) was found from treatment T5 (glyphosate @ 10 ml/L+ 1 HW at 70 DAP + straw mulch @ 5 t/ha) and the lowest yield (20.16 kg/ha in 2021-22 and 20.07 in 2022-23) was found from control plot T10. Maximum weed control efficiency (91.97%) was found from treatment T5 (glyphosate @ 10 ml/L+ 1 HW at 70 DAP + straw mulch @ 5 t/ha). Benefit cost ratio (BCR) was highest under glyphosate @ 10 ml/L+ 1 HW at 70 DAP + straw mulch @ 5 t/ha (3.75) followed by T6 (Paraquat @ 10 ml/L+ 1 HW (70 DAP) + straw mulch 5 t/ha (3.33).
Keywords: Turmeric, weeds, glyphosate, straw mulch, yield