Photosynthesis Inhibiting E ects of Pesticides on Sweet Pepper Leaves
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Giménez–Moolhuyzen, Miguel; van der Blom, Jan; Lorenzo-Mínguez, Pilar; Cabello García, Tomás; Crisol–Martínez, EduardoFecha
2020-01-21Resumen
Although a large number of pesticides of di erent compositions are regularly used in
agriculture, the impact of pesticides on the physiology of field crops is not well understood. Pesticides
can produce negative e ects on crop physiology—especially on photosynthesis—leading to a potential
decrease in both the growth and the yield of crops. To investigate these potential e ects in greenhouse
sweet peppers, the e ect of 20 insecticides and 2 fungicides (each sprayed with a wetting agent) on the
photosynthesis of sweet pepper leaves was analyzed. Among these pesticides, nine caused significant
reductions in photosynthetic activity. The e ects were observed in distinctive ways—either as a
transitory drop of the photosynthetic-rate values, which was observed at two hours after the treatment
and was found to have recovered after 24 h, or as a sustained reduction of these values, which
remained substantial over a number of days. The results of this study suggest that the production o...
Palabra/s clave
Pesticidas
planta
pimiento
invernaderos
Fisiologia
Actividad fotosíntesis