target cluster of watermelon

Figure 1. Target cluster of watermelon. Positive for potyvirus. Figure 1. Target cluster of watermelon. Positive for potyvirus.
Figure 2. Target cluster of watermelon. Negative for potyvirus. Figure 2. Target cluster of watermelon. Negative for potyvirus.
Figure 3. Target cluster of watermelon. Positive for papaya ringspot virus. Figure 3. Target cluster of watermelon. Positive for papaya ringspot virus.
Figure 4. Target cluster of watermelon. Not analyzed for virus. Figure 4. Target cluster of watermelon. Not analyzed for virus.