Chemical weed control in peanut (Arachis hypogaca L.)
Date
1986
Authors
Joseph Mubo Awotunde
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Abstract
A field study was conducted to determine the effect of cloproxydim [(E,E)-2-1]1-[/)3-chloro-2-propenyl)oxy]inino]butyl-5-[2-(ethylthio)propyl]-3-hydroxy-cydohexen-1-one] on the yield and yield components of peanut when applied alone or in combination with other compounds or when integrated with cultivation at different frequencies and intervals.
BPI-Pn9 variety of peanut was applied with cloproxydim (Selectone TM) at different rates (0.25, 0.50, 0.75, and 1.00 kg a.i.//ha) alone or in combination with either bentazon (basagran TM) at 0.75 kg a.i./ha (applied post emergence to the weeds) or chloramben (Amiben TM) at 3.00 kg a.i./ha (applied pre-emergence to the weeds) or in sequence with one time or two times cultivation.
The weed species predominantly present were Echinochloa colona (L.) Link., Dactoloctenium aegyptium (L.) Beauv., Cyperus rotundus L., Trianthema portulacastrum L., Portulaca oleracea L., Crotalaria mucronata Desv., and Rottboellia exaltata L.f.
Pre-emergence chloramben (3.00 kg a.i./ha) followed by cloproxydim (0.25 kg a.i./ha) plus sticker (Alkyl Olefin aromatic polymera) and cultivation (ix) followed by cloproxydi (0.50 kg a.i./ha) plus sticker reduced the population of grassy weeds from 2 toll times and 1.90 to 10.29 ties, respectively lower than the unweeded check.
The addition of the spray adjuvant to the herbicides provide better control of both grasses and broadleaf weeds without significant injury to the peanut plants.
A one gram decrease in dry weight of grasses produced 44.5 g increase in yield while a gram reduction in dry weight of broadleaf weeds provided 18.34 g yield increase. The highest computed yield of 242.02 kilograms per hectare was obtained from plots that received one cultivation followed by cloproxydim at 0.50 kg a.i./ha plus sticker.
The overall result showed that a treatment of chloramben (3.00) kg a.i./ha) followed by cloproxydim (0.25 kg a.i./ha) plus sticker and a supplementary cultivation (hilling up) at least once during the early stages of the peanut plants was suitable and efficient for the control of weeds associated with the crop. No phytotoxic effect of the chemicals was observed on peanut.
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Research Subject Categories::FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING::Plant production::Agronomy