TY - JOUR
T1 - Allelopathy versus Neotyphodium (Acremonium) Endophytes versus Competition Effects on Crabgrass Suppression by 12 Perennial Ryegrass Cultivars
AU - King, John W.
AU - Lee, Donghoon
AU - Richardson, Michael D.
AU - Lavy, Terry L.
AU - Skulman, Brigs
AU - Marlatt, Melody L.
AU - West, Charles P.
PY - 1999
Y1 - 1999
N2 - The determination of allelopathic affects from 12 perennial ryegrass, Lolium perenne L., cultivars was attempted. Field trials of overseeding crabgrass, Digitaria sanquinalis (L.) Scop., into ryegrass stands did not show differences among the 12 cultivars. Crabgrass overseeding trials with 99 other ryegrasses showed a range of crabgrass percent cover and inhibitions in bioassays. Laboratory investigations centered on the effects of extracts of leaf-stem tissue on growth of duckweed, Lemna minor L., fronds. Extracts were prepared by macerating frozen tissue samples in water, centrifuging and filtering. Full (10 g/30 ml), one-half and one-quarter strength extract concentrations generally resulted in decreasing inhibition of frond growth, but sometimes stimulations occurred. Various bioassays of crabgrass seed germination showed some inhibitions. Overall results as to inhibition of duckweed and crabgrass by specific cultivars were inconsistent.
AB - The determination of allelopathic affects from 12 perennial ryegrass, Lolium perenne L., cultivars was attempted. Field trials of overseeding crabgrass, Digitaria sanquinalis (L.) Scop., into ryegrass stands did not show differences among the 12 cultivars. Crabgrass overseeding trials with 99 other ryegrasses showed a range of crabgrass percent cover and inhibitions in bioassays. Laboratory investigations centered on the effects of extracts of leaf-stem tissue on growth of duckweed, Lemna minor L., fronds. Extracts were prepared by macerating frozen tissue samples in water, centrifuging and filtering. Full (10 g/30 ml), one-half and one-quarter strength extract concentrations generally resulted in decreasing inhibition of frond growth, but sometimes stimulations occurred. Various bioassays of crabgrass seed germination showed some inhibitions. Overall results as to inhibition of duckweed and crabgrass by specific cultivars were inconsistent.
UR - http://www.scopus.com/inward/record.url?scp=1542424089&partnerID=8YFLogxK
U2 - 10.1021/bk-2000-0743.ch023
DO - 10.1021/bk-2000-0743.ch023
M3 - Article
AN - SCOPUS:1542424089
SN - 0097-6156
VL - 743
SP - 363
EP - 382
JO - ACS Symposium Series
JF - ACS Symposium Series
ER -