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Influence of Seed Vigor, Herbicide Rates, and Incorporation Depths on Emergence and Seedling Development of Soybean (Glycine max)

Published online by Cambridge University Press:  12 June 2017

Sunil Ratnayake  and
David R. Shaw
Sunil Ratnayake
Affiliation:
Dep. Plant Pathol. Weed Sci., Miss. State Univ., Mississippi State, MS 39762
David R. Shaw
Affiliation:
Dep. Plant Pathol. Weed Sci., Miss. State Univ., Mississippi State, MS 39762
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Abstract

Imazaquin at 140, 280, and 420 g ai ha-1 did not negatively affect seedling emergence from high vigor (98% germination) soybean seed but, coupled with a 5.0-cm herbicide incorporation depth, reduced seedling emergence from low vigor (67% germination) seed at all rates. Imazaquin at 420 g ha-1 incorporated 5.0 cm deep reduced low and high vigor seedling height 36 and 28%, respectively. Imazaquin at all rates reduced root length from high vigor seed, whereas only the high rate reduced root length of seedlings from low vigor seed. Although 420 g ha-1 metribuzin did not affect seedling emergence or root length, emerged seedlings were severely damaged when herbicide was incorporated to 5.0 cm. Trifluralin at 840 and 1680 g ai ha-1 reduced emergence of low vigor seed when incorporated 5.0 cm deep. Trifluralin at 840 g ha-1 did not affect seedling height or root length, but 1680 g ha-1 reduced height of seedling from low and high vigor seed by 86 and 66% when incorporated 5.0 cm deep. Trifluralin at 1680 g ha-1 reduced shoot dry weight of both types of seedlings only at the 5.0-cm incorporation depth.

Keywords

Imazaquin, 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-oxo-1H-imidazol-2-yl]-3-quinolinecarboxylic acidmetribuzin, 4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-onetrifluralin, 2,6-dinitro-N,N-dipropyl-4-(trifluoromethyl)benzenaminesoybean, Glycine max (L.) Merr. ‘Centennial’Imazaquinmetribuzintrifluralin
Type
Research
Information
Weed Technology , Volume 6 , Issue 4 , December 1992 , pp. 801 - 806
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

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