Jae Sung Lee

Kunsan National University · Department of Biological Science

Rust disease poses a major threat to global agriculture and forestry. It is caused by types of Pucciniales, which often require alternate hosts for their life cycles. Nyssopsora cedrelae was previously identified as a rust pathogen on Toona sinensis in East and Southeast Asia. Although this species had been reported to be autoecious, completing its...

Rust symptoms on Meliosma myriantha trees have been noticed during disease surveys in Korea since 2010, with a high disease incidence frequently surpassing 90%. The causal fungus of the rust disease was identified as Neophysopella vitis based on the morphological investigation and molecular sequence analysis of the internal transcribed spacer (ITS)...

The present study performed an in-depth investigation of rust diseases affecting Meliosma myriantha and Meliosma oldhamii trees (Sabiaceae) in Korea. The analysis identified four distinct species of the genus Neophysopella (Pucciniales) as the causal agents. Among these, N. hornotina was found to infect only M. oldhamii, whereas three Neophysopella...

Malva verticillata (Malvaceae), commonly called Chinese mallow or whorled mallow, is an annual herb native to East Asia and is currently distributed worldwide. In Korea, this plant is cultivated as a leafy vegetable and cooked like spinach or used in soups and also as a medicine material. In March 2022, typical symptoms of rust disease were observe...

Virginia creeper (or five-leaved ivy; Parthenocissus quinquefolia) is one of the most popular and widely grown climbers worldwide. In September 2021, Virginia creeper leaves with typical rust symptom were found in an arboretum in Korea, with severe damage. Globally, there is no record of a rust disease on Virginia creeper. Using morphological inves...

Clematis patens (Ranunculaceae), often called big-flower clematis, is a perennial plant native to Northeast Asia, including China, Japan, and Korea. This plant is one of the popular ornamental plants because of its large and colorful flower. In Korea, it is widely cultivated for public and private gardening and medicinal purposes. In September of 2...

Vitis davidii (Rom.Caill.) Foëx, commonly known as spine grape, is a deciduous climber native to China. Its fruits are consumed fresh or used to make wine in South and Central China. In recent years, spine grape has been cultivated in Korea. In July 2020, downy mildew was detected on spine grape vines in Jeongeup (35°42′17″N, 126°54′02″E), Korea, w...

The genus Pseudoperonospora, an obligate biotrophic group of Oomycota, causes the most destructive foliar downy mildew disease on many economically important crops and wild plants. A previously unreported disease by Pseudoperonospora was found on oriental pickling melon (Cucumis melo var. conomon) in Korea, which is a minor crop cultivated in the t...

The family Peronosporaceae, an obligate biotrophic group of Oomycota, causes downy mildew disease on many cultivated and ornamental plants such as beet, cucumber, grape, onion, rose, spinach, and sunflower. To investigate the diversity of Peronosporaceae species in Korea, we performed morphological analysis for dried plant herbariums with downy mil...

The genus Peronospora, an obligate biotrophic group belonging to Oomycota, causes serious damage to a variety of wild and ornamental plants, as well as cultivated crops, such as beet, rose, spinach, and tobacco. To investigate the diversity of Peronospora species parasitic to Stellaria and Pseudostellaria (Caryophyllaceae) plants in Korea, we perfo...

The genus Hyaloperonospora (Peronosporaceae; Oomycota) is an obligate biotrophic group that causes downy mildew disease on the Brassicaceae and allied families of Brassicales, including many economically relevant crops, such as broccoli, cabbage, radish, rape, and wasabi. To investigate the diversity of Hyaloperonospora species in northeast Asia, w...

Korean lawngrass (Zoysia japonica Steud.) produces a highly dense, drought-tolerant, and wear-resistant turf that makes it desirable for golf courses, home lawns, parks, and sports fields. Because of its cold tolerance, it was adopted in many countries with temperate climates, from East Asia (China, Japan, and Korea) to as far north as Maryland of...