Study of annual weeds and morning glory (Convolvulus arvensis L.) control alternatives in unirrigated vineyards

Arturo Lavín A.1, Marcelo Kogan A.2

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.