Emergence and Growth of Sicklepod (Cassia obtusifolia) with Various Planting and Herbicide Incorporation Depths

Greenhouse experiments were conducted to evaluate effects of sicklepod planting depths and chlorimuron, imazaquin, and metribuzin incorporation depths on sicklepod seedling emergence and growth. There was 35 and 90% sicklepod seedling emergence from 0- and 2-cm planting depths, respectively, in untr...

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Bibliographic Details
Published in:Weed science 1990-07, Vol.38 (4/5), p.401-405
Main Authors: Shaw, David R., Rainero, Hector P., Smith, Clyde A., Wixson, Marshall B., Ratnayake, W.R.A.S., Bruff, Stacey A., Newsom, Larry J.
Format: Article
Language:English
Subjects:
Acid soils
Agricultural soils
BIOLOGIA
BIOLOGIE
CASSIA OBTUSIFOLIA
CONTENIDO DE MATERIA SECA
CONTROL QUIMICO
DESHERBAGE
Emergence
EMERGENCIA
ENFOUISSEMENT
ENTERRADO
ESCARDA
GRAINE
HERBICIDAS
HERBICIDE
Herbicides
LEVEE
LUTTE CHIMIQUE
MALEZAS
MAUVAISE HERBE
METRIBUZINA
METRIBUZINE
Planting
Plants
PROFONDEUR
PROFONDEUR DE SEMIS
PROFUNDIDAD
PROFUNDIDAD DE SIEMBRA
Seedlings
Seeds
SEMILLA
Soil water
Soybeans
TENEUR EN MATIERE SECHE
Weed Control and Herbicide Technology
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Summary:Greenhouse experiments were conducted to evaluate effects of sicklepod planting depths and chlorimuron, imazaquin, and metribuzin incorporation depths on sicklepod seedling emergence and growth. There was 35 and 90% sicklepod seedling emergence from 0- and 2-cm planting depths, respectively, in untreated soil 26 days after planting; emergence decreased with each additional increment below 2 cm. Chlorimuron at 63 g ai ha reduced the number of plants present 11 days after planting at 1- and 2-cm planting depths except when unincorporated. However, deeper sicklepod planting required chlorimuron incorporation to at least 6 cm for maximum reduction of plants. Imazaquin at 140 g ai ha was not as effective as chlorimuron, but a reduction in the number of plants was noted at 1- and 2-cm planting depths when imazaquin was incorporated to 4, 6, or 8 cm. Metribuzin at 420 g ai ha consistently reduced the number of plants at all incorporation depths except when unincorporated but had little effect on emergence. Chlorimuron and imazaquin reduced sicklepod dry weight most for all planting depths when incorporated 4 to 10 and 6 to 10 cm, respectively. Metribuzin reduced sicklepod biomass at all incorporation depths.
ISSN:0043-1745
1550-2759
DOI:10.1017/S0043174500056745