The Pepino mosaic virus (PepMV) causes tomato on a multitude of symptoms, sometimes surprising in their appearance and their expression in time. We can observe leaf mosaics more or less severe , sometimes quite yellow (Figures 1 and 2), spots, or even fairly marked chlorotic areas (Figures 3 and 4) and necrotic lesions (Figure 5). The yellow spots are the most characteristic symptom of this virus. Deformations of leaflets and leaves are also observed in periods of low light; these may curve up or down the leaf blade, and exhibit dark green blisters and enations. The apices of plants see their growth more or less blocked; the leaflets and leaves are rather dark in color, narrower and indented. These symptoms give them the characteristic appearance of nettle leaves or damage from hormone-type herbicides. In addition, brown and corky streaks may appear on the stem.

The sepals are sometimes necrotic superficially (Figure 6), and the flowers may turn brown and abort . The fruits reveal a mosaic more or less intense , especially when they are ripe (figures 7 and 8). This mosaic can occur without other symptoms being present on the plants.

Diseased plants tend to senescent prematurely. They are also often distributed along the row, at least initially.

The expression of symptoms seems to be strongly influenced by climatic conditions, in particular by temperature and light in the shelters. Thus, symptoms are easily observed from fall through spring, and tend to disappear in warm, bright periods. The disease expresses itself differently depending on the stage of development of the plant and the cultivar. Note that it can go completely unnoticed, despite the infection of many plants, or appear on a layer of leaves and fruits.