Plant pests and diseases in some organic greenhouses from Muntenia region.
Organic greenhouse production has expanded during the past ten years. However, plant pests and diseases are the major impediment in obtaining good quality produce and yield. The purpose of this study was to highlight the phytosanitary problems faced by farmers in the organic vegetable production system from Muntenia region. The list of arthropods fauna comprises 15 species, most of them specific to the studied area and analyzed cultures. Our survey highlights the presence of three invasive species: Tuta absoluta, Nezara viridula and Halyomorpha halys and their potential to become important pests of greenhouses tomatoes. Ten phytopathogenic agents were also present in the studied organic greenhouses. Among these, five were phytopatogenic fungi of Alternaria spp., Cercospora beticola, Passalora fulva, Septoria spp. and Erysiphae spp., and three were bacterial pathogens of Pseudomonas syringae, Ps. lachrymans and Pectobacterium spp. Two viral diseases were also detected based on plant disease symptoms, TSWV and CMV. On the other hand, the spectrum of natural enemies was very well represented in the organic production system. The best ways to reduce the infection are considered to be prevention and agro-technical measurements.