Strawberry "snake eye disease" primarily affects the leaves, causing small purple-red spots that gradually develop into round lesions measuring 3-5 mm in diameter. The center of the lesions turns brown and eventually gray, with distinct purple-red edges and slightly raised rims, resembling the eyes of a snake. This fungal infection can also spread to the petioles, pedicels, calyx, stolons, and fruit stems, leading to severe damage if left unchecked.
The disease typically begins to show symptoms before flowering and becomes more widespread during the berry harvest period. As the lesions progress over time, they may grow larger, eventually causing the leaves to wither and die. Infected plants often exhibit reduced vigor, lower yield, and poor fruit quality.
To manage this disease, chemical control is essential. Early intervention is key. Apply a 200-fold dilution of Bordeaux mixture, or 500-fold diluted Mancozeb, or 400-fold diluted Supremone 30% (a fungicide containing chlorothalonil), or 300-fold diluted Sulphur Bromide 14%, or 500-fold diluted Copper Oxychloride 77% WP, or 500-fold diluted Chlorothalonil 75% wettable powder, or 1000-fold diluted Thiophanate-methyl 70% wettable powder, or 1000-fold diluted Carbendazim 50%. These treatments should be applied every 10 days, with a total of 2 to 3 applications. It’s important to stop spraying at least 10 days before harvest to ensure safe and high-quality fruit production.
Proper cultural practices, such as good air circulation, avoiding excessive humidity, and removing infected plant parts, can also help reduce the risk of disease spread. Regular monitoring and early detection are crucial for effective management of strawberry snake eye disease.
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