| |
| Publication Type:
| Report |
|---|
| Author(s): | MacDonald, G. E.;
Brecke, B. J.;
Schilling, D. G.;
Colvin, D. L. |
|---|
| Author Affiliation: | Department of Agronomy, University of Florida, Gainesville, FL |
|---|
| Title: | Chemical and cultural control of dogfennel |
|---|
| Section: | Weed control in turf, pasture, and rangeland
Other records with the "Weed control in turf, pasture, and rangeland" Section
|
|---|
| Meeting Info.: | Nashville, Tennessee: January 16-18, 1989 |
|---|
| Source: | Proceedings: Southern Weed Science Society. Vol. 42, 1989, p. 145. |
|---|
| Publishing Information: | Champaign, Illinois: Southern Weed Science Society |
|---|
| # of Pages: | 1 |
|---|
| Abstract/Contents: | "Field studies were conducted in 1987 and 1988 at Gainesville, Florida to evaluate methods for the control of dogfennel (Eupatorium capillifolium). Experiments were established to determine the vegetative state-of-growth at which selected herbicides were most efficacious and also to evaluate the impact of mowing and reproductive development on herbicide treatments. A fallow location with a poorly drained flatwoods soil was utilized for all experiments. A uniform, heavy infestation of perienniating dogfennel was present at the time of treatment. Fall 1987 herbicide treatments were applied to vegetative (before flowering) and flowering dogfennel. In addition, herbicides were applied to mowed (allowed 3-4 weeks for regrowth) and unmowed dogfennel. A stage-of-growth study was established in May 1988 where dogfennel received selected herbicide treatments at four different stages of vegetative development. These stages were classified on the basis of height and are as follows: Stage I - 30cm, Stage II - 60 cm, Stage III - 90 cm, Stage IV - 120 cm. In all studies different rates of several herbicides were applied. All experiments were arranged as three-way factorial designs with 4 replications. Regrowth biomass (0.25m2 quadrants) was taken from both the mowing and reproductive studies. From each quadrant was taken from both the mowing and reproductive studies. From each quadrant the number of plants, average height (cm), and biomass (g) were determined and used as a quantitative measure of control. In the stage-of-growth study significant regrowth biomass was not available therefore visual ratings of regrowth were taken. However, 0.25m2 quadrants were taken 90 days after each growing stage and compared to a harvest taken at the time of treatment. Preliminary results from the stage-of-growth study indicate that there was a decrease in dogfennel regrowth as the rate of all herbicides increased. Of all the herbicides evaluated triclopyr + 2,4-D (trade name Crossbow) gave the best control over rates and growing stages. Herbicide efficacy increased in the later stages of vegetative growth and also reduced the amount of chemical needed to give adequate control. In the mowing study mowing alone provided partial control of dogfennel and in addition enhanced the efficacy of herbicide treatments. For the reproductive development study herbicide treatments were more effective if applied before the onset of flowering." |
|---|
| Language: | English |
|---|
| References: | 0 |
|---|
| Note: | "Finding a common ground"
This item is an abstract only! |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
MacDonald, G. E., B. J. Brecke, D. G. Schilling, and D. L. Colvin. 1989. Chemical and cultural control of dogfennel. South. Weed Sci. Soc. Proc. 42:p. 145. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=228464 |
| If there are problems with this record, send us feedback about record 228464. |
| Choices for finding the above item: |
|---|
| 
MSU catalog number: b2207931 |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
