virus of watermelon

Virus-The most common virus diseases of watermelon in Indiana are potyviruses. Watermelon do not have viral symptoms as much as pumpkins since the latter are grown later in the season. Symptoms on foliage may include mosaic and shoestring leaves. Symptoms on fruit are not common. Viruses do not usually cause economic damage to watermelon. 

Figure 1. Papaya ringspot virus of watermelon. Figure 1. Papaya ringspot virus of watermelon.
Figure 2. Papaya ringspot virus of watermelon. Figure 2. Papaya ringspot virus of watermelon.
Figure 3. Watermelon leaf positive for potyvirus. Figure 3. Watermelon leaf positive for potyvirus.