Medir el potencial hídrico: cuándo, dónde y por qué?

A pesar de que existe un consenso en que la medida del potencial hídrico es muy representativa del estado hídrico de la planta, existen algunas discrepancias sobre cómo y a qué hora del día se deben realizar estas mediciones para obtener informació

Effects of irrigation on the seasonal abundance of Empoasca vitis in north-italian vineyards.

The effect of irrigation on the abundance of Empoasca vitis (Go\ua8 the) populations was investigated in four vineyards located in northeastern Italy. In two experiments, we compared leafhopper population densities in plots irrigated (micro-spray irrigation system) or nonirrigated. In another experiment, we studied the effect of various irrigation systems on E. vitis populations over two successive seasons. In particular, eve treatments were compared: control (not irrigated), traditional drip system, three types of subirrigation varying in distance from the row (40, 135, and 95 cm). In this vineyard, stem water potential was monitored with a pressure chamber. E. vitis population densities were affected by irrigation, with higher densities of this pest recorded on irrigated vines. Highest E. vitis densities were detected in drip irrigation plots compared with nonirrigated plots where water stress was highest. Moderate water stress (subirrigation plots) was associated with intermediate leafhopper densities. Implications for integrated pest management are discussed