"Digitaria Sanguinalis (l.) Scop., Echinochloa Crus-galli (l.) Beauv. And Setaria Faberi (herrm.) Interference And Subsequent Control In Container Grown Cornus X Baileyi, Juniperus Chinensis ""san Jose' And Potentilla Fruticosa ""gold Drop'"
Walker, Kandy Laine
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Permalink
https://hdl.handle.net/2142/71784
Description
Title
"Digitaria Sanguinalis (l.) Scop., Echinochloa Crus-galli (l.) Beauv. And Setaria Faberi (herrm.) Interference And Subsequent Control In Container Grown Cornus X Baileyi, Juniperus Chinensis ""san Jose' And Potentilla Fruticosa ""gold Drop'"
Author(s)
Walker, Kandy Laine
Issue Date
1987
Department of Study
Horticulture
Discipline
Horticulture
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Agriculture, Agronomy
Abstract
A survey of the Illinois nursery operators revealed foxtail, quackgrass, crabgrass and barnyardgrass were the most prevalent grasses found infesting field and container grown ornamentals. Subsequently, randomized block designed experiments were conducted for two consecutive years to determine the influence of grass weeds growing in container grown ornamentals. Data indicated grass weed interference as early as 21 days with Cornus x baileyi, 63 days with Juniperus chinensis 'San Jose' and 42 days with Potentilla fruticosa 'Gold Drop'. By the termination of the interference studies, C. x baileyi shoot dry weight was decreased as much as 72%; J. chinensis shoot dry weight was reduced as much as 38% and P. fruticosa shoot dry weight was reduced as much as 75%. Additional experiments conducted disclosed no benefits in spacing containers further apart to commensate for weed interference effects. Chemical efficacy data indicated the possible use of fenoxaprop, haloxyfop and quizalofop, at recommended rates, to control E. crus-galli, D. sanguinalis and S. faberi growing in J. chinensis, P. fruticosa and C. x baileyi.
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