The effects of certain weed control treatments on young oil palms and the weed spectrum in the field [Nigeria, herbicides]
1982
Aya, F.O. | Fayemi, A.A.A.
The field trials were conducted to evaluate the effects of the various weed control measures on both the oil palm crop and the weed spectrum. Fernine 7, a 2, 4-D based herbicide, reduced the reference Eupatorium odoratum stands to 0.9% of their original density within the first year of the treatments. The herbicide however drastically dwarfed the surviving oil palms and significantly reduced both female inflorescences and early bunch yields. Three other herbicides, Roundup, Klinopalm and diuron/paraquat mixture also reduced the E. odoratum stands to 1.5%, 8.2% and 28.7% respectively of their original density by the end of the 30-month duration of the treatments but showed no significant ill-effects on the subsequent growth and the early yields of the palms. Asulox 40, another herbicide, was singular in reducing the E. odoratum stands to 1.0% of their original density while significantly increasing oil palm female inflorescence production, sex ratio and early bunch yields. A cultural treatment involving the use of cassava (Manihot utilissima) as an intercrop showed the greatest enhancement of the oil palm growth and early bunch yields while reducing the reference weed stand to 16.2% of their original density
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