Symptoms include small yellow or dark leaf lesions around the hydathodes, V -shaped leaf lesions, wilt, distortion of plants and early senescence.

[1] Watercress is a relatively small crop worldwide, but economically significant for some particular regions of the globe.

[2][3] It was reported that infections can lead to up to 60% yield reduction and rejection of crops.

[3] The disease has been regularly observed in Hawaii production in all islands, mostly during the rainy season from December to April in areas with poor air circulation.

It is advised to  minimize moisture on leaves by reducing overhead irrigation and increasing air circulation.