At the Cauquenes Station (INIA), during 1973 and 1974, the possible control of annual weeds and morning glory, using residual, contact and hormonal herbicides, was studied.
The residual herbicides were: Diuron; Simazine; Simazine + Ametrine; Terbutilazine; Terbumethone + Terbutilazine; and Napronamide + Linuron. The contact herbicides were: Paraquat and DNBP. The hormonal herbicides were: Aminotriazol; Aminotriazol + Amonium tiocianate; Atrazine + MCPP + 2, 4, 5-T; Gliphosate; and 2, 4, 5-T.
All the residual products showed an excellent control of annual weeds, but this was followed by an invasion of morningglory.
Gliphosate, 2, 4, 5-T and the mixture of Atrazine + MCPP + 2, 4, 5-T were the best control for morning glory, even it used at lower doses than recommended. This was specially true with 2, 4, 5-T.
A program, including residual herbicides in autumn-winter and hormonal products in spring-summer, will allow a total control of weeds in the unirrigated vineyards of the area, with possible advantages overthetraditional, manual or mechanical, systems.
|1 Subestación Experimental Cauquenes (INIA), Casilla 165, Cauquenes-Maule, Chile. |
2 Depto. Producción Agrícola, Fac. de Ciencias Agrarias, Veterinarias y Forestales, U. de Chile, Casilla 1004, Santiago, Chile.