MSMA and pyrithiobac effects on cotton (Gossypium hirsutum) development, yield and quality

Field research was conducted in Tennessee at Jackson in 1991 and at Milan in 1992 to compare the effect of MSMA and pyrithiobac on cotton development, yield, and quality. In separate treatments to different plots, pyrithiobac at 0.14 kg ai ha-1 did not affect development, yield, and quality of cotto...

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Bibliographic Details
Published inWeed science Vol. 44; no. 1
Main Authors Shankle, M.W. (Univ. of Tennessee, Knoxville, TN.), Hayes, R.M, Reich, V.H, Mueller, T.C
Format Journal Article
LanguageEnglish
Published 01.01.1996
Subjects
ALTURA
ARSENIC
ARSENICO
CALIDAD
COMPOSICION QUIMICA
COMPOSITION CHIMIQUE
CONTROL QUIMICO
CRECIMIENTO
CROISSANCE
DATE DE TRAITEMENT
DESHERBAGE
DOSE D'APPLICATION
DOSIS DE APLICACION
ESCARDA
ETAPAS DE DESARROLLO DE LA PLANTA
FACTEUR DU MILIEU
FACTORES AMBIENTALES
FECHA DE TRATAMIENTO
FIBRAS VEGETALES
FIBRE VEGETALE
FRUCTIFICACION
FRUCTIFICATION
GOSSYPIUM HIRSUTUM
HAUTEUR
HERBICIDAS
HERBICIDE
INDICE DE CRECIMIENTO
LUTTE CHIMIQUE
MISSOURI
PERDIDAS
PERTE
QUALITE
RENDEMENT
RENDEMENT DES CULTURES
RENDIMIENTO
RENDIMIENTO DE CULTIVOS
SEMENCE
SEMILLAS
STADE DE DEVELOPPEMENT VEGETAL
TAUX DE CROISSANCE
TENNESSEE
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Summary:Field research was conducted in Tennessee at Jackson in 1991 and at Milan in 1992 to compare the effect of MSMA and pyrithiobac on cotton development, yield, and quality. In separate treatments to different plots, pyrithiobac at 0.14 kg ai ha-1 did not affect development, yield, and quality of cotton. MSMA at 2.24 kg ai ha-1 decreased cotton plant internode length 10 to 15% and height by 15% 5 wk after late treatment both years. MSMA applied to 50 cm cotton reduced subsequent plant height in 1992, but other plant characteristics were not affected. In 1991, MSMA increased squares and decreased blooms and bolls for monopodia and sympodia position one and two, which suggested a delay in plant development. In 1991, mechanical harvest lint yields were decreased by MSMA at first harvest while increasing second harvest lint yields. However, in 1991 only MSMA applied late decreased total harvest lint yield 20%. Plant mapping data determined that the yield decrease was a result of decreased yields at sympodia positions one and two. Cotton seed arsenic analysis indicated that MSMA-late increased arsenic levels by approximately 1 ppmw in 1991 for sympodia at position one and two compared to the untreated check, while position two contained the highest level of 1.8 ppmw
Bibliography:9625113
H50
H60
ISSN:0043-1745
1550-2759
DOI:10.1017/S004317450009367X