Supporting evidence can be seen in the percentage of conidia produced on mummified fruit. So a grower should spray microorganisms not only in the spring, which is the time of blossom for strawberries, but also in the fall. Special attention must be paid to precipitation. A wet season will produce more B. cinerea than a dry season, and subsequent applications of microorganisms may be needed to compensate for high precipitation and humidity. Although their experiments were performed on onions, the same could work with strawberries.
Necrosis is a discoloration caused by plant viruses.
Virus-resistant varieties of strawberries can be planted to eliminate necrotic tissue caused by viruses. Fertilizer burn can also cause leaf discoloration and death, which is a host for B. cinerea . Care taken in fertilizer application, in other words ensuring that fertilizer does not lay on the leaves, can reduce damage and subsequent infection by B. cinerea . Removal of necrotic leaves is possible. In smaller strawberry patches where the berries are hand-picked, workers can be instructed to remove dead leaves from the plants and place them in between the rows.