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vol.63 número2RESISTENCIA DE Phytophthora infestans (Montagne) de Bary A METALAXIL, EN CULTIVO DE PAPAS EN EL NORTE DE CHILEEVALUACIÓN DE LA PRODUCCIÓN Y CALIDAD DE CEBADA SEMBRADA SOLA Y ASOCIADA A ESPECIES FORRAJERAS PARA LA PRODUCCIÓN DE ENSILAJE índice de autoresíndice de materiabúsqueda de artículos
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Agricultura Técnica

versión impresa ISSN 0365-2807

Resumen

ORMENO N., Juan; FUENTES V., Francisco  y  SOFFIA C., Verónica. Tomato (Lycopersicon esculentum Mill.) tolerance to post transplant applications of the herbicide halosulfuron-methyl. Agric. Téc. [online]. 2003, vol.63, n.2, pp.125-134. ISSN 0365-2807.  http://dx.doi.org/10.4067/S0365-28072003000200002.

During the 1998/99 season at La Platina Research Regional Center of the National Agricultural Research Institute (INIA) (33º34’ S lat, 70º38’ W long, altitude 625 m.o.s.l.), on a loamy-clay soil, field trials were conducted to determine crop tolerance of tomatoes (Lycopersicon esculentum Mill.) of the industrial cultivars H-993, P-76, APT-127, APT-410, and fresh consumption cultivars Cal Ace, and XPH-12221, to post transplant applications of halosulfuron-methyl (Sempra® 75 WG) at the recommended rate 75 g ha-1 and at an overdose of 150 and 300 g ha-1. At all of the doses halosulfuron-methyl did not produce any significant adverse effects on the foliage. The greatest levels of foliar discoloration were observed on cv. P-76 at 300 g ha-1 seven days after treatment (DDA). This phytotoxicity was temporary, restricted to 7-15 DDA, disappearing almost completely at 21 DDA. There was no reduction in plant height and width to 30 DDA, except the width of cv. P-76 treated at 300 g ha-1. Single plant and total tomato yield of the varieties Cal Ace, XPH-12221, H-993, APT-127 y APT-410 were not affected by any herbicide applications of halosulfuron-methyl. No dose produced adverse effects on the polar and equatorial fruit diameter. The industrial hybrid P-76 had a significant reduction in total fruit yield and number of fruit per plant at 150 and 300 g ha-1, but not at 75 g ha-1. Tomato plants were tolerant to early post transplant applications at the normal recommended rate of halosulfuron-methyl.

Palabras clave : transplanted tomato; selectivity; sulfonilureas; Lycopersicon esculentum.

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