| Registro completo |
| Provedor de dados: |
Ciência Rural
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| País: |
Brazil
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| Título: |
Plant growth regulator losses in cotton as affected by adjuvants and rain
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| Autores: |
Echer,Fábio Rafael
Rosolem,Ciro Antonio
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| Data: |
2012-12-01
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| Ano: |
2012
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| Palavras-chave: |
Gossypium hirsutum
Plant height
Mepiquat chloride
Chlormequat Chloride
Rainfall
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| Resumo: |
Most of Brazilian cotton is produced in regions where annual rainfall exceeds 1,500mm, hence plant growth regulators (PGR) may be washed from the leaves before being absorbed. The objective of this research was to evaluate mepiquat chloride and chlormequat chloride washing from cotton leaves by rains occurring at different moments post spraying. The experiment was conducted in a greenhouse. Both PGR were sprayed to cotton at pin-head square at 15g ha-1 a.i. with and without a silicon-based adjuvant, and simulated rains were applied at 0, 0.75, 1.5, 3.0, 6.0, 12.0 and 24 hours after spraying, plus a control without rainfall. Addition of silicon adjuvant increased PGR uptake. Rainfall occurring up to 24 hours after spraying resulted in some PGR loss from cotton leaves, mainly in the absence of the adjuvant. The decreased uptake implies that in order to achieve the desired level of growth reduction, at least a fraction of the original PGR rate should be reapplied.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782012001200006
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| Editor: |
Universidade Federal de Santa Maria
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| Relação: |
10.1590/S0103-84782012005000120
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| Formato: |
text/html
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| Fonte: |
Ciência Rural v.42 n.12 2012
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| Direitos: |
info:eu-repo/semantics/openAccess
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