Resumen

GARCIA, M. S et al. Efecto de las heladas tardías en la producción de durazneros precoces cultivados en la región central de la provincia de Santa Fe (Argentina). FAVE. Secc. Cienc. agrar. [online]. 2013, vol.12, n.2, pp.75-84. ISSN 1666-7719.

Effect of late frost on fruit yield of peaches cultivated in the central area of the province of Santa Fe (Argentina) The aim of this study was to evaluate the effect of late frosts on the production of peaches implanted in the central region of the province of Santa Fe. The cultivars studied were ‘Flordastar', 'Tropic Snow', 'Early Grande', 'San Pedro’, 'Hermosillo' and 'Flordaking'. The minimum critical temperatures used were established by Proebsting & Mills (1978). Weather frosts were recorded from May to September 2007 and 2008. The fruit set was the period of greatest sensitivity. This period occurred in the second half of August. In 2007 and 2008 13 and 10 weather frosts were recorded, respectively. In 2007, the yield losses ranged between 7 and 55%. The most affected were 'Tropic Snow', 'Hermosillo' and 'Early Grande'. In 2008, losses exceeded 80% in all cultivars, justifying active measures against late frosts.

Palabras clave : Prunus persica; Injury; Critical temperatures; Active frost control.