French Surname Meaning with its French Last Name Origin. The French surname meaning with its French last name origin and family coat of arms like the picture shown here is a great way to show your family lineage. Each French surname meaning and French last name origin comes from our database of over 700,000 family surnames.
Alternaria leaf blight. Michelle Grabowski, University of Minnesota, Extension Educator. Alternaria leaf blight is caused by the fungus Alternaria cucumerina. This disease is most problematic on melon but can also occur on cucumber, pumpkin and squash.Alternaria leaf blight does not commonly infect fruit but can reduce yield and quality through reduced plant vigor and sunscald of exposed fruit.lternaria leaf blight does not commonly infect fruit but can reduce yield and quality through reduced plant vigor and sunscald of exposed fruit.
Alternaria symptoms once infection begins include small, dark, circular spots that regularly reach Â½ inch in diameter. As they spread, alternaria leaf spots may change in color from black to tan or gray, with a yellow halo around the outside.Because spot development is heavily influenced by the environment, there are frequently noticeable concentric rings that spread from the initial point of infection.he fungal pathogens in the genus Alternaria can be devastating to plants year after year. The spores overwinter on old plant debris and attach themselves to seeds, making alternaria leaf spot especially tricky to completely eliminate if you save your own seeds.