Artículos de revistas
Desenvolvimento de cultivares de mamoneiras em relação à profundidade de semeadura e seletividade de herbicidas dinitroanilinas
Fecha
2012-01-01Registro en:
Semina-ciencias Agrarias. Londrina: Universidade Estadual de Londrina (UEL), v. 33, n. 1, p. 27-38, 2012.
1676-546X
10.5433/1679-0359.2012v33n1p27
WOS:000307002000003
WOS000307002000003.pdf
9855493448161702
5669160000483769
0000-0003-0431-5942
Autor
Universidade Estadual de Maringá (UEM)
Universidade Estadual Paulista (Unesp)
Assoc Cultural & Educ Garca
Institución
Resumen
Three trials were carry out at Garca Municipal County, São Paulo, Brazil in order to study the effects of sowing depth of three castor bean cultivars submitted or not to dinitroaniline herbicides application in pre-emergency. The three cultivars chosen as fllow: AL Guarany 2002 variety and Iris and Savana hybrids. The experiments were disposed in randomized complete blocks, with fifteen treatments and four replications, by using factorial scheme 5x3, composed by sowing in 2,5; 5,0; 10,0; 15,0 and 20,0 cm depths with application in pre-emergency condition of the herbicides: trifluralin (1125 g a.i. ha(-1)), pendimethalin (1500 g a.i. ha(-1)) and check without herbicide (hand-hold check). Only the sowing depths of 2.5 and 20.0 significantly reduced the initial development of castor bean cultivars AL Guarany 2002 and Iris, without interfering in characteristics number of leaves, stem diameter, insertion height of first raceme and yield. Trifluralin application has increased significantly AL Guarany 2002 yield, in sowings from 5.0 cm deep, unlike Iris and Savana hybrids, where most of sowing depths studied, resulted in yield declines. Pendimethalin herbicide presented high selectivity mainly for AL Guarany 2002 and Savana cultivars, characterizing, generally as the safest option castor bean crop.