|
|
| Tuesca,Daniel; Puricelli,Eduardo; Nisensohn,Luisa; Faccini,Delma; Papa,Juan. |
| Field studies were established in Zavalla and Oliveros, Argentina, during four years in order to optimize Johnsongrass (Sorghum halepense (L.) Pers.) chemical control by means of the thermal calendar model in comparison with other criteria (weed height or days after sowing). The effect of three application dates of postemergence herbicides was determined by visual control, density of tillers originated from rhizome bud regrowth, and from crown and shoot bud regrowth, and soybean yield. Following the thermal calendar model criterion, applications during the second date afforded the best control. Weed height for the first date showed little variability between experiments but was highly variable in the second and third application dates, achieving in some... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Weeds; Herbicides; Application timing. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999000500004 |
| |
