Abstract
The apprehension among oil palm farmers on the toxicity of glyphosate necessitated the need for an alternative herbicide for weed control in oil palm. Thus, a study was conducted at the Nigerian Institute for Oil Palm Research (NIFOR) to determine the efficacy of tank mixture of glufosinate ammonium (Basta) + indaziflam (Alion) for weed control in oil palm. The treatments consisted of glyphosate at 1.5 kg a.i ha-1, glyphosate + diuron at 1.5+2.0 kg a.i. ha-1, glufosinate ammonium at 0.4 kg a.i. ha-1, glufosinate ammonium at 0.5 kg a.i. ha-1, tank mixture of glufosinate ammonium + indaziflam at 0.4 + 0.04 kg a.i. ha-1, tank mixture of glufosinate ammonium + indaziflam at 0.5 + 0.04 kg a.i. ha-1and weedy control. The results showed that tank mixture of glyphosate + diuron at 1.5 + 2 kg a.i ha-1, glufosinate ammonium + indaziflam at 0.4 + 0.04 kg a.i. ha-1 and glufosinate ammonium + indaziflam at 0.5 + 0.04 had the best weed control efficiency of 78.5%, 78.6% and 78.3% respectively up to 20 weeks. The study concluded that tank mixtures of glufosinate ammonium + indaziflam were as good as glyphosate + diuron for weed control in oil palm.
Highlights
Manual weeding has constituted a serious weed control problem in oil palm because of the required labour for the frequent slashing of the luxuriant weed growth within the wide inter-row spacing in oil palm production
The objective of this study was to evaluate the effect of glufosinate ammonium and indaziflam along with glyphosate and diuron commonly used for weed control in oil palm
The treatments consisted of glyphosate at 1.5 kg a.i ha-1, glyphosate + diuron at 1.5+2.0 kg a.i. ha-1, glufosinate ammonium at 0.4 kg a.i. ha-1, glufosinate ammonium at 0.5 kg a.i. ha-1, tank mixture of glufosinate ammonium + indaziflam at 0.4 + 0.04 kg a.i. ha-1, tank mixture of glufosinate ammonium + indaziflam at 0.5 + 0.04 kg a.i. ha-1and weedy plot
Summary
Manual weeding has constituted a serious weed control problem in oil palm because of the required labour for the frequent slashing of the luxuriant weed growth within the wide inter-row spacing in oil palm production. The scarcity of labour and the huge cost involved in weeding the inter-rows and circles around the palms has made some small-scale oil palm farmers abandon their plantations. Chemical weed control which has been the alternate practice among small-scale farmers and large-scale oil palm growers becomes imperative. In effect, this has reduced the dependence on labour for hand weeding which often delays operations in times of scarcity (Hornus, 1990). Manual weeding which is often practiced among smallscale oil palm farmers can be more expensive than chemical weeding (Hamel, 1986).
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