Both green and ripened fruit may be affected. Rose buds and blossoms fail to develop. Infected buds may droop and stems develop grayish-black lesions. Flowers may turn light brown and shrivel. The gray felt-like mold may develop.
Tomatoes develop gray mold on all above ground plant parts.
In the case of tomatoes only cool weather is required as the leaf canopy creates the necessary humid conditions. Newly pollinated flowers are quite susceptible to grey mold infection, and the infection can spread to the fruit. Occasionally gray mold infections on stems will encircle the stem cutting off nutrient flow, causing the top of the tomato plant to die. Beans develop the typical felty gray coloured mold on leaves, stems and pods. The plants may die and wilt prematurely.