CONTROL POSITIVO, TOMV, 1 TUBO_2,5ML

ToMV (2) is economically damaging in glasshouse and outdoor tomato crops in many countries. The virus is readily spread by handling and cultural operations. It also contaminates seeds and soil, but no natural vector is known. It is readily sap-transmissible to a fairly wide range of herbaceous plant species. The virus is widespread and often epidemic in tomato crops. Disease symptoms are greatly influenced by temperature, daylength, light intensity, age of plant, virus strain and cultivar of tomato. Many solanaceous species are susceptible to the virus. Most suscepts produce necrotic local lesions, sometimes followed by systemic mosaic-mottling and necrosis. Most species tested in the families Aizoaceae, Amaranthaceae, Chenopodiaceae and Scrophulariaceae are also susceptible.