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Response of Perennial Sowthistle Selections to Herbicides 1
Author(s) -
Bell A. R.,
Nalewaja John D.,
Schooler A. B.
Publication year - 1973
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1973.0011183x001300020013x
Subject(s) - biology , shoot , perennial plant , dicamba , picloram , agronomy , greenhouse , horticulture , weed , botany , weed control
Perennial sowthistle ( Sonchus arvensis L.) seed was collected from three fields in North Dakota and Minnesota. Plants grown from the seed in the greenhouse were treated with 2,4‐dichlorophenoxy acetic acid (2,4‐D), and 3,6‐dichloro‐o‐anisic acid (dicamba), or 4‐amino‐3,5,6‐trichloropicolinic acid (picloram). The range in response to the herbicides of perennial sowthistle from each field was similar with 0 to 8% of the plants tolerant and 68 to 92% susceptible. The range of response to herbicides was similar for greenhouse plants grown from clones collected throughout North Dakota, South Dakota, and Minnesota and for plants grown from seed collected in selected crop fields. The response of selected perennial sowthistle clones to herbicides in the field did not resemble the response obtained in the greenhouse. The number of live shoots per field plot after treatment with 1.68 kg/ha dicamba or 2,4‐D varied among selections from 0 to 8 and 3 to 12, respectively. Generally, the selections with the most live shoots per plot after herbicide treatment had a greater capacity for regrowth from creeping roots than did the selections with the least live shoots.