Thunbergia alata, commonly called black-eyed Susan vine, is a herbaceous perennial climbing plant species in the family Acanthaceae.It is native to Eastern Africa, and has been naturalized in other parts of the world.It is found in Cerrado vegetation of Brazil and Hawaii, along with eastern Australia and the southern USA in the states of Texas and Florida and in Puerto Rico. ).Although it often refers explicitly to the Rudbeckia hirta species.. Botanist Carolus Linnaeus gave the genus name Rudbeckia as a nod to the renowned Swedish father and son duo, both named Olof Rudbeck. Black-eyed Susan vine is commonly grown in the Midwest as a season annual to provide color in a vertical setting.
Tight spacing, overhead watering and high humidity contribute to the spread of these leaf spot diseases – the very nature of these plants makes breaking the disease cycle difficult. Fans of the University of Southern Mississippi will be delighted to know that this flower was the inspiration for their school colors. Will they be alright this year?

Several leaf spots diseases can cause the symptoms you described.

Spots on Leaves of Black Eyed Susan.

The leaves are long, lanceolate, and rough to the touch.The stalk is robust and also coarsely textured. Spotted leaves on black eyed Susan appear where fungal spores have been allowed to overwinter and conditions were right for reinfection in the spring. Spotted leaves on black eyed Susan appear where fungal spores have been allowed to overwinter and conditions were right for reinfection in the spring. The Black-Eyed Susan belongs to the sunflower family and is the state flower of Maryland. As indicated by its name, the flower head has a prominent black or dark-brown central cone that is surrounded by rich, yellow, petal-like rays.

Viruses: Light and dark green mosaic coloration forms on the leaves. Black-eyed Susan is the common name for the entire genus of Rudbeckia (Rudbeckia spp. The state flower of Maryland, black-eyed susan has a mounding habit, growing to 2 to 3 feet tall, and can be annual, perennial, or biennial, depending on the variety and where it is grown.

It’s also a medicinal herb believed to treat colds, flu and even snakebites. Black-eyed Susan vine plant is a tender perennial that is grown as an annual in temperate and cooler zones.

Verticillium: Diseased plants should be removed and destroyed. General Description: Black-eyed susan is a relatively large wildflower, ranging from 30-90 cm. Tight spacing, overhead watering and high humidity contribute to the spread of these leaf spot diseases – the very nature of these plants makes breaking the disease cycle difficult. You can also grow the vine as a houseplant but be wary as it may grow to 8 feet (2+ m.) in length. Black-eyed Susan vine care is most successful when you can mimic the plant’s native African climate. Leaves yellow, brown, and wilt. Verticillium survives in soil for many years in soil. in height. Leaves may be distorted and the plants stunted.

The Black-Eyed Susan is known to be pioneer plants since they’re the first to grow after instances of fire or natural calamities. Photo by Kaarina Dillabough – Flickr. Last summer the leaves of my black-eyed Susans developed spots and the whole plant eventually dried up.


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