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Control of speargrass ( Imperata cylindrica (L) Raeuschel) with glyphosate and fluazifop‐butyl for soybean ( Glycine max (L) Merr) production in savanna zone of Nigeria
Author(s) -
Avav T
Publication year - 2000
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/(sici)1097-0010(20000115)80:2<193::aid-jsfa476>3.0.co;2-m
Subject(s) - imperata , glyphosate , sowing , agronomy , biology , weed control , zoology
A field trial was conducted in 1996 and 1997 to control speargrass ( Imperata cylindrica (L) Raeuschel) for soybean production. The treatments comprised four levels of glyphosate, 1.08, 1.44, 1.80 and 2.16 kg ha −1 , applied pre‐tillage and followed by one hoe‐weeding (HW) at 6 weeks after planting (WAP); fluazifop‐butyl, 0.125, 0.25 and 0.375 kg ha −1 , at 3WAP; 1HW at 3WAP; 2HW at 3 and 6WAP; and an unweeded control. Glyphosate and fluazifop‐butyl controlled 57–85% and 51–83% respectively of I cylindrica compared with 64–67% by traditional hoe‐weeding. The highest grain yield (1.88 t ha −1 ) was obtained from plots treated with glyphosate (1.44 kg ha −1 ) + 1HW. The highest profit, however, was obtained with fluazifop‐butyl. It was unprofitable to apply glyphosate at rates higher than 1.44 kg ha −1 to control I cylindrica at 30 cm foliage. © 2000 Society of Chemical Industry