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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Whitwell, T.;
Kalmowtiz, K. |
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| Author Affiliation: | Clemson University |
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| Title: | Longevity of Prostrate Spurge and Large Crabgrass Control in Container-Grown Ilex. |
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| Source: | Southern Weed Science Society Proceedings. Vol. 40, January 1987, p. 139. |
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| Publishing Information: | Nashville, TN: Southern Weed Science Society. |
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| Keywords: | TIC Keywords: Euphorbia supina; Digitaria sanguinalis; Longevity; Control; Herbicides
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| Abstract/Contents: | "Herbicide combinations of oxyfluorfen plus pendimethalin, oxyfluorfen plus oryzalin and bifenox plus oxadizon were evaluated for the length of weed control. Prostrate spurge (Ephorbia humistrata) and large crabgrass (Digitaria sanquinalis) were bioassay species for longevity studies in container-grown Ilex crentata-Japanese Holly. Ilex liners were potted in 2.8 L containers with medis that contained 80% pine bark, 10% sand and 10% peat one month prior to herbicide application. Overhead irrigation was used as needed and 16-4-8 slow releases fertilizer was applied monthly. Weed seeds (30 to 40 per plot) were planted in a sand mixture prior to herbicide treatment. Herbicides were applied with a shaker can. Rates were the labeled rate of 2.2 plus 1.1 kg/ha for oxyfluorfen plus pendimethalin and oxyfluorfen plus oryzalin, respectively. The expected labeled rate for bifenox plus oxadizon is 3.4 + 2.2 kg/ha. Twice the labeled rates were also used for each herbicide combination. The experimental design was a split plot with herbicide treatment as the main plot and weed species as sub plot with 8 replications. Evaluations were made at 30, 60 and 90 days after treatment (DAT). Visual ratings for weed control and hooly injury were recorded. Weeds were counted and the above ground biomass harvested monthly after treatment. Weed seeds were replanted at 30 and 60 DAT to the respective pots. Large crabgrass and prostrate spurge control decreased to an unacceptable level (>60%) by 90 DAT with all herbicides at the labeled rates. it required twice the labeled rate to obtain effective large crabgrass control at 90 DAT. Prostrate spurge was not effectively controlled with twice the labeled rate 90 DAT. Bifenox plus oxadizon provided superior control of prostrate supurge 30 and 60 DAT compared to oxyfluorfen and oryzalin at the labeled rate. Crabgrass control at the labeled rate was also better than oxyfluorfen plus oryzalin at 60 and 90 DAT. Weed numbers and weight generally reflect control ratings. No crop injury was observed." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Whitwell, T., and K. Kalmowtiz. 1987. Longevity of Prostrate Spurge and Large Crabgrass Control in Container-Grown Ilex.. South. Weed Sci. Soc. Proc. 40:p. 139. |
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MSU catalog number: SB 611 .S6 |
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