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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Clavijo, J.;
Kitchen, L. M. |
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| Author Affiliation: | Louisiana Agricultural Experiment Station. |
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| Title: | Translocation of 14-C Fluazifop as Influenced by Site of Application. |
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| Source: | Southern Weed Science Society Proceedings. Vol. 40, January 1987, p. 334. |
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| Publishing Information: | Nashville, TN: Southern Weed Science Society. |
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| Keywords: | TIC Keywords: Translocation; Fluazifop; Sorghum halepense; Digitaria sanguinalis; Herbicides
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| Abstract/Contents: | "Research was conducted to determine if the site of application of fluazifop influenced its absorption and translocation in johnsongrass (Sorghum halepense) and large crabgrass (Digitaria sanguinalis). Plants were grown in the greenhouse and treated at the 3 leaf stage. Each plant was treated with 0.4 kg/ha fluazifop with the exception of a 1 cm2 area which was later treated with 10 uL of treatment solution containing approximately 0,05 uCi 14-C fluazifop (labelled on the carboxyl carbon of the propanoic acid). Sites of application included the upper leaf collar, the whorl of the second true leaf, the upper surface of the second true leaf, the lower surface of the second true leaf, and the upper surface of the uppermost true leaf. Plants were harvested 24 hours after treatment and the treated area was washed 3 times in cold fluazifop to remove any unabsorbed herbicide. Each plant was sectioned into the treated area, tip of the treated leaf, base of the treated leaf, plant above the node of the treated leaf, plant below the node of the treated leaf, roots and rhizomes, and tillers. Plant sections were lyophilized and oxidized, and radioactivity was assayed in a liquid scintillation counter. The experiment was run twice for each species with 4 replicates per treatment. Site of application appeared to influence the recovery since whorl treatments resulted in 30 to 50% recovery while all other treatments resulted in 70 to 80% recovery. In johnsongrass, less radioactivity detected in the leaf wash solutions when the whorls were treated as compared to leaf treatments. Site of application did not influence the level of radioactivity detected in the leaf washes of large crabgrass. Site of application did not affect the percent of recovered 14-C found in the treated area of johnsongrass, while greatest absorption was observed when large crabgrass was treated on the lower surface of the second true leaf. Less 14-C fluazifop moved to the tip of the treated leaf when johnsongrass was treated on the lower surface of the second true leaf compared to the upper surface treatments. In contrast, more 14-C moved to the base of the treated leaf when the lower leaf surface of johnsongrass was treated. In both species, a greater quantity of 14-C moved to the plant above the node of the treated leaf when the whorls were treated. In johnsongrass, 56% of the recovered 14-C accumulated in the plant above the node of the treated area when the upper leaf collar was treated. Basipetal translocation was greater when 14-C fluazifop was applied to plant whorls. In crabgrass, more 14-C accumulated in the plant below the node of the treated area when the upper leaf collar was treated compared to the whorl of the second true leaf. The converse was true for johnsongrass. Translocation of 14-C to roots, rhizomes, and tillers was minimal and not significantly affected by site of application." |
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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):
Clavijo, J., and L. M. Kitchen. 1987. Translocation of 14-C Fluazifop as Influenced by Site of Application.. South. Weed Sci. Soc. Proc. 40:p. 334. |
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MSU catalog number: SB 611 .S6 |
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