APPROACHES OF COMBINED WEED CONTROL SYSTEM IN MATURE TEA PLANTATIONS

An experiment was conducted at the Bangladesh Tea Research Institute Farm & Bilashcherra Experimental Farm during 2019–2020 to determine the best weed management combinations for managing weeds in matured tea plantations. Five treatments were used in the experiment, each of which was duplicated three times using RCBD. Every two weeks, data on the percentage of weed reduction and the weekly harvesting of green leaves were gathered. Every treatment exhibited a somewhat notable fluctuation in the yield of made tea and the percentage of weed growth compared to the control. The treatment (T₃), Chilling + Indaziflam (pre-emergent herbicide) + Paraquat (post-emergent herbicide) showed maximum reduction of weed density (67%) over the control followed by (T₅) simultaneous application of Indaziflam + Paraquat + Sickling, where the weed reduction percentage is 63.46%.  Therefore, higher mean yield (1837 kg/ha) was obtained from T₃ which is following by T₅, Where the mean yield is 1785 kg/ha over the control. Among the treatments used, Chilling + Indaziflam + Paraquat produced the best gross margin return and was also shown to be the most cost-effective. It is advised that the most cost-effective and efficient combinations for managing weeds in established tea farms are Chilling + Indaziflam + Paraquat, taking into account all the parameters.