| |
| Publication Type:
| Report |
|---|
| Content Type: | Abstract or Summary only |
|---|
| Author(s): | Hahn, K. L.;
Coble, H. D. |
|---|
| Author Affiliation: | Department of Crop Science, North Carolina State University, Raleigh, NC. |
|---|
| Title: | The Interaction Between Chlorimuron and Quizalofop Among Several Grass Species. |
|---|
| Meeting Info.: | Held: January 18-20, 1988, Tulsa, OK. |
|---|
| Source: | Southern Weed Science Society Proceedings. Vol. 41, January 1988, p. 360. |
|---|
| Publishing Information: | Nashville, TN: Southern Weed Science Society. |
|---|
| Keywords: | TIC Keywords: Interactions; Quizalofop; Digitaria sanguinalis; Eleusine indica; Sorghum halepense; Panicum; Panicum dichotomiflorum; Application rates; Tank mix
|
|---|
| Abstract/Contents: | "Recent studies have reported a reduction in grass control with clethodim, fluazifop, haloxyfop, sethoxydim and quizalofop used in combination with chlorimuron. Yet, there is little information about the antagonistic effects of chlorimuron on any of these grass herbicides. We chose to study the effect of chlorimuron on quizalofop to obtain more information about this interaction. Tank mix studies were conducted on large crabgrass (Digitaria sanguinalis), goosegrass (Eleusine indica), johnsongrass (Sorghum halepense) and Texas panicum (Panicum texanum). The experimental design in each experiment was a randomized complete block with a 6x5 factorial arrangement of treatments replicated three times. Treatments consisted of 0.018, 0.036, 0.054, 0.072, 0.090 kg/ha quizalofop applied alone and tank mixed with 0.007, 0.010, 0.013, 0.016 kg/ha cholrimuron. A nonionic surfactant @ 0.25% (v/v) was added to all spray solutions. Herbicide treatments were applied using a backpack sprayer adjusted to deliver 186 l/ha. Grasses were at the 3-5 leaf stage when treated. Visual injury ratings were taken at 21 days after herbicide treatment. Sequential applications studies were conducted on broadleaf signalgrass (Brachiaria platyphylla), goosegrass, large crabgrass and fall panicum (Panicum dichotomiflorum). The experimental design in each experiment was a split plot with a 5x8 factorial arrangement of treatments replicated three times. Whole plots consisted of 0.0, 0.018, 0.036, 0.054, 0.072 kg/ha quizalofop. All quizalofop treatments were applied at the same time. Grass plants were at the 3-5 leaf stage when treated with quizalofop. Subplots were chlorimuron application times. Chlorimuron was applied at a rate of 0.013 kg/ha on -7, -5, -3, -1, 0, +1, +3 days relative to the quizalofop treatments ("0" represents a tank mixture of chlorimuron and quizalofop). All herbicide treatments were applied by the same methods used in the tank mix studies. Visual injury ratings were taken at 28 days after quizalofop treatments. Results from the tank mix studies indicated that the antagonism of chlorimuron on quizalopfop occurred in all grass species except goosegrass. The magnitude of the antagonism increased with increased chlorimuron rate and desreased with increased quizalofop rate. With quizalofop rates of 0.072 and 0.090 kg/ha, the antagonism was no longer evident with any of the grass species except large crabgrass. Two tank mix studies were conducted on large crabgrass in 1987. Results from one of the experiments in which the large crabgrass was under a moisture stress suggests that the antagonism of chlorimuron on quizalofop may be enhanced during periods of moisture stress. Results from the sequential application studies indicated that an antagonistic interaction between chlorimuron and quizalofop was not occurring with goosegrass. With the other grass species studied, a reduction in grass control resulted when chlorimuron was applied at -3 and -1 days. This antagonism was more severs with the -1 day treatment of chlorimurin. However, the antagonism was greatest with the tank mixture treatments. The antagonism could be reduced by increasing the quizalofop rate. Generally, the antagonism was not evident when chlorimuron was applied at 1 or 3 days after the quizalofop treatment. Results from these sequential application studies suggest that the antagonism of chlorimuron on quizalofop is greatest with broadleaf signalgrass." |
|---|
| Language: | English |
|---|
| References: | 0 |
|---|
| Note: | This item is an abstract only! |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hahn, K. L., and H. D. Coble. 1988. The Interaction Between Chlorimuron and Quizalofop Among Several Grass Species.. South. Weed Sci. Soc. Proc. 41:p. 360. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=16024 |
| If there are problems with this record, send us feedback about record 16024. |
| Choices for finding the above item: |
|---|
| 
MSU catalog number: SB 611 .S6 |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
