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Germination of Texas Gourd (Cucurbita texana) and Its Control in Soybeans (Glycine max)

Published online by Cambridge University Press:  12 June 2017

Lawrence R. Oliver ,
Steve A. Harrison  and
Marilyn McClelland
Lawrence R. Oliver
Affiliation:
Dep. Agron., Altheimer Lab., Univ. of Arkansas, Fayetteville, AR 72701
Steve A. Harrison
Affiliation:
Dep. Agron., Altheimer Lab., Univ. of Arkansas, Fayetteville, AR 72701
Marilyn McClelland
Affiliation:
Dep. Agron., Altheimer Lab., Univ. of Arkansas, Fayetteville, AR 72701
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Abstract

Storage of intact Texas gourd [Cucurbita texana (A.) Gray] pepos for 21 days after harvest increased germination of seeds from pepos collected 15 to 47 days after flowering. Germination increased as day length decreased and as osmotic potential of germination media increased. Temperatures of 20, 25, and 30C resulted in 72, 93, and 99% germination, respectively. No seeds germinated at 10 or 40C. Seedling emergence decreased as planting depth increased, with no emergence from 12.5 cm. Control of Texas gourd in soybeans [Glycine max (L.) Merr.] was achieved with preemergence applications of metribuzin [4-amino-6-tert-butyl-3-(methylthio)-as-triazin-5(4H)-one], metribuzin plus alachlor [2-chloro-2′,6′-diethyl-N-(methoxymethyl)-acetanilide], and oxadiazon [2-tert-butyl-4 (2,4-dichloro-5-isopropoxyphenyl)-δ2-1,3,4-oxadiazolin-5-one], with successful control partially dependent on soil and climatological conditions. Postemergence treatments that resulted in adequate control included applications of acifluorfen {5-[2-chloro-4-(trifluoromethyl)-phenoxy]-2-nitrobenzoic acid}, oxyfluorfen [2-chloro-1-(3-ethoxy-4-nitrophenoxy)-4-(trifluoromethyl) benzene], and metribuzin plus 2,4-DB [4-(2,4-dichlorophenoxy)butyric acid] applied at an early soybean growth stage and repeated.

Keywords

Soil moisturephotoperiodplanting depthafterripeningherbicides
Type
Research Article
Information
Weed Science , Volume 31 , Issue 5 , September 1983 , pp. 700 - 706
Copyright
Copyright © 1983 Weed Science Society of America 

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References

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