An investigation into the differential response of hemp dogbane (Apocynum cannabinum L.) to two pyridine herbicides

Field and laboratory experiments were conducted to study the differential effects of fluroxypyr and clopyralid herbicides on hemp dogbane (Apocynum cannabinum L.). In field experiments, fluroxypyr provided excellent control of hemp dogbane while the response to clopyralid was very poor. Good season long control of hemp dogbane was obtained with postemergence application of fluroxypyr at rates as low as 140 g ai/ha. In certain situations, control four and eight weeks after application was superior when application was made during the early reproductive growth stage as opposed to the vegetative growth stage. Twelve months after treatment, fluroxypyr provided 65 to 75 percent control of regrowth. Clopyralid treatments at this time were not significantly different than controls.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Agronomy

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• Orfanedes, Michael S.

Contributors dc:contributor

• Wax, Loyd M.

• Agriculture, Agronomy

Statement dc:rights

• Copyright 1990 Orfanedes, Michael S.

Language dc:language

eng

Identifier

AAI9114368
(UMI)AAI9114368

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/19565