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Integrated Weed Control Management in Soybeans (Glycine max) in Greece

Published online by Cambridge University Press:  12 June 2017

Spyros Vizantinopoulos  and
Nikos Katranis
Spyros Vizantinopoulos
Affiliation:
National Agric. Res. Foundation, Benaki Phytopathol. Inst., 145 61 Kiphissia
Nikos Katranis
Affiliation:
National Agric. Res. Foundation, Res. Exp. St., 351 00 Vardates, Greece
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Abstract

Field experiments were conducted in 1988, 1989, and 1990 in Greece to investigate the combination of cultural and chemical methods for weed control in soybean. The selectivity of herbicides or the combination of herbicides used was dependent on application rate. Imazaquin applied PRE was selective on soybean even at 0.18 kg/ha, whereas imazethapyr was safer on soybean than imazaquin at 0.22 kg/ha. Metribuzin at 0.37 kg/ha tank-mixed with alachlor, metolachlor, imazaquin, and SAN 582H were not phytotoxic at their recommended rates. All herbicides satisfactorily controlled the weeds in the experiments. The early-season period threshold level for a mixed population of Amaranthus spp. occurred 3.0 to 3.5 wk after weed emergence. Density of Amaranthus spp. of about 270 to 470 plants/m2 caused soybean yield reduction equal to 11 to 35%, respectively. The treatments did not influence the oil content of the soybean seed but in one experiment the protein content was influenced slightly by some of the treatments. The results emphasize the importance of using chemical, cultural, and competition threshold levels of cultural practices for an integrated approach for weed control in soybean.

Keywords

Alachlor, 2-chloro-N-(2,6-diethylphenyl)-N-(methoxymethyl)acetamideimazaquin, 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-3-quinolinecarboxylic acidimazethapyr, 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-ethyl-3-pyridinecarboxylic acidmetolachlor, 2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamidemetribuzin, 4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-oneSAN 582H, (IRS, aRS)-2-chloro-N-(2,4-dimethyl-3-thienyl)-IN-(2-methoxy-1-methylethyl)-acetamidetumble pigweed, Amaranthus albus # AMAAL, livid amaranth, Amaranthus lividus L. # AMALI, redroot pigweed, Amaranthus retroflexus L. # AMAREsoybean, Glycine max (L.) Merr., ‘Williams.’Herbicide applicationhoeingsoybean productionAmaranthus spp.
Type
Research
Information
Weed Technology , Volume 8 , Issue 3 , September 1994 , pp. 541 - 546
Copyright
Copyright © 1994 by the Weed Science Society of America 

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References

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