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Titolo:
POSTEMERGENCE ACTIVITY OF SULFENTRAZONE - EFFECTS OF SURFACTANTS AND LEAF SURFACES
Autore:
DAYAN FE; GREEN HM; WEETE JD; HANCOCK HG;
Indirizzi:
FMC CORP HAMILTON GA 31811 AUBURN UNIV,DEPT BOT & MICROBIOL AUBURN AL 36849 USDA ARS,SO WEED SCI LAB STONEVILLE MS 38776
Titolo Testata:
Weed science
fascicolo: 4, volume: 44, anno: 1996,
pagine: 797 - 803
SICI:
0043-1745(1996)44:4<797:PAOS-E>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
HERBICIDE; ADJUVANT; TRANSLOCATION; GLYPHOSATE; ABSORPTION; METABOLISM;
Keywords:
ADJUVANTS; HERBICIDE ABSORPTION; SOYBEAN; CASOB; CASOC; ABUTH; IAQTA; CYPES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
30
Recensione:
Indirizzi per estratti:
Citazione:
F.E. Dayan et al., "POSTEMERGENCE ACTIVITY OF SULFENTRAZONE - EFFECTS OF SURFACTANTS AND LEAF SURFACES", Weed science, 44(4), 1996, pp. 797-803

Abstract

Sulfentrazone was foliar applied at 34 and 56 g ai ha(-1) alone or incombination with surfactants to soybean cultivars Hutcheson and Centennial and to sicklepod, coffee senna, smallflower morningglory, velvetleaf, and yellow nutsedge. The most sensitive weeds, including coffee senna, smallflower morningglory, and velvetleaf, were severely injuredby the lowest rate when sulfentrazone was applied with surfactants. Sulfentrazone provided the highest control of yellow nutsedge with X-77, Soybeans were not severely injured by sulfentrazone applied alone, but 55% foliar injury occurred when the herbicide was applied with X-77. However, the seedlings were not killed, Sicklepod was the most tolerant of the weeds tested, In the absence of surfactants, the order of radiolabeled sulfentrazone absorption by the foliage was Centennial (5.8%) = Hutcheson (8.5%) = coffee senna (10.4%) < yellow nutsedge (17.0%) < velvetleaf (22.3%) = smallflower morningglory (24%), Sicklepod leaves did not retain droplets containing sulfentrazone when no surfactant was used. Species with the highest foliar absorption also showed thegreatest phytotoxic response to the herbicide. Addition of surfactants to the spray mixture enhanced the foliar absorption and overall phytotoxicity of sulfentrazone in the weeds. An inverse relationship was detected between the foliar absorption of sulfentrazone without surfactants and the amount of cuticular wax present on the leaves. No such correlation was observed when surfactants were used. Thus, surfactants overcame the barrier to absorption imposed by the cuticular wax and, under these conditions, selectivity apparently became dependent upon species-specific cellular tolerance to sulfentrazone.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 12/08/20 alle ore 01:09:22