SciELO - Scientific Electronic Library Online

vol.34 número3Efecto del sistema y densidad de la almaciguera en el cultivo de cebolla (Allium cepa)Efecto de la cobertura del suelo con cascarilla de arroz en el crecimiento y rendimiento del tomate de ramillete índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Ciencia e investigación agraria

versión On-line ISSN 0718-1620


SEREY, Ricardo A; TORRES, Rene  y  LATORRE, Bernardo A. Pre- and post-infection activity of new fungicides against Botrytis cinérea and other fungi causing decay of table grapes. Cienc. Inv. Agr. [online]. 2007, vol.34, n.3, pp.215-224. ISSN 0718-1620.

Pre- and post-harvest diseases restrict table grape production and exports (Vitis vinifera L.) in Chile, with the most important disease being grey mold (Botrytis cinérea). In addition, rot due to Aspergillus niger, Cladosporium herbarum, Penicillium expansum, and Rhizopus stolonifer frequently occurs. The pre- and post-infection activity of fungicides against these pathogens was studied on Thompson Seedless table grapes. Detached, mature, berries were used, and inoculations were performed with 20 µL of a 106 spores•mL-1 suspension placed on three punctures aseptically made at the calyx end of each berry. Fungicides used (per liter) were boscalid (600 mg), boscalid (200 mg) + pyraclostrobin (100 mg), boscalid (200 mg) + kresoxim methyl (100 mg), cyprodinil (60 mg) + fludioxonil (40 mg), BAS 600 KBF (100 mg) + metrafenone (150 mg), BAS 600 KBF (200 mg) + boscalid (300 mg), BAS 600 KBF (100 mg) + pyraclostrobin (100 mg), and captan (400 mg). Each fungicide was applied either by drop (12 µL•-berry-1) placed on three punctures made with a sterile hypodermic needle or by 60 s immersion. Berries were then incubated in humid chambers at 20°C The pre-infection (protection) activity of the fungicides varied considerably among the pathogens tested and was found to be significant (p < 0.001) and, with one exception (A. niger), it was significantly (p < 0.002) affected by the application method. The interaction between fungicide and application method was only significant (p < 0.001) for R. stolonifer at 48 h post treatment. In general, pre-infection activity gave 0 to 4 days protection after drop applications and 0 to 21 days after immersion treatments. The post-infection (curative) activity varied among pathogens and fungicide treatments. However, it was always below 24

Palabras clave : Blue mold; curative activity; gray mold; protection activity; sour rot; Vitis vinifera.

        · resumen en Español     · texto en Inglés     · Inglés ( pdf )


Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons