Md Ziaur Rahman Bhuiyan

North Dakota State University | NDSU

Damping-off disease caused by multiple species of soilborne pathogens causes severe economic losses to sugar beet production. Thus, identifying the causal agent is important to formulating effective disease management. During a July 2021disease survey in a sugar beet field at Grand Forks, North Dakota, we observed that approximately 15% of plants l...

Sugar beet (Beta vulgaris L.) is one of the major sugar sources in the world. Rhizoctonia solani causes damping-off and crown and root rot that can result in significant yield and economic losses. R. solani AG 2-2 IIIB is the most damaging anastomosis group in sugar beet production. In this study, we evaluated three different types of inoculums, na...

Twenty sugar beet (Beta vulgaris L.) seedlings showing stunting, pale in color, and rotten root tips symptoms were collected from a commercial field in Moorhead (46.92°N, 96.70°W), Minnesota, USA (Supplemental Fig. 1). Average disease incidence and severity were estimated at 17% and 50%, respectively. Isolation of fungal colonies from infected root...

Cercospora leaf spot (CLS) is the most destructive foliar disease in sugar beet (Beta vulgaris). It is caused by Cercospora beticola Sacc., a fungal pathogen that produces toxins and enzymes which affect membrane permeability and cause cell death during infection. In spite of its importance, little is known about the initial stages of leaf infectio...

In July 2021, sugar beet (Beta vulgaris L.) leaves with numerous tan to brown spots with white-bleached center and oval to irregularly shaped were collected from a field in Minnesota (MN) (46.2774° N, 96.3100° W), with 15% disease incidence and 30% disease severity. Leaves were washed with tap water then surface disinfected in 1% NaOCl aqueous solu...

Cercospora leaf spot (CLS) is a destructive disease limiting sugar beet production and managed using resistant cultivars, crop rotation, and timely applications of effective fungicides. Since 2016, its causal agent, Cercospora beticola, has been reported to be resistant to Quinone outside inhibitors (QoIs) and to have reduced sensitive to Demethyla...

Sugar beet (Beta vulgaris L.) is the second major economically important sugar-yielding crops in the world and the US ranked third in world sugar beet production. Sugar beet crown rot and root rot are caused by Rhizoctonia solani (Khün) is a serious threat for sugar beet production and processing. Prior to the adoption of Roundup Ready® sugar beet...

Hemp (Cannabis sativa L.) is grown for medicinal and industrial uses. Symptomatic hemp (Mountain Mango) seedlings were received from a grower’s greenhouse in Towner County (48.7486° N, 99.2761° W), North Dakota (ND), USA in July 2020. Seedlings had brown to blackish root tips, thread-like hypocotyl rot and seedling collapse, with about 8 to 10% dis...

Sugar beet is a major sugar yielding crop in the states of Minnesota (MN) and North Da-kota (USA). Sugar beet root samples collected from Moorhead, MN in September 2020 had typical rot symptoms along with whitish mycelia growth and blackish sclerotia on the external surface of the root. Pure, sterile cultures were obtained from infected roots. Scle...

In this contribution, we report on a survey of leaf blight on sugar beet in the Sidney factory district of Montana caused by the soilborne fungus Sclerotinia sclerotiorum. In addition to morphological and pathological characterization of the pathogen on sugar beet, we confirmed the molecular identity of the fungus by DNA sequence analysis of the ri...

North Dakota (ND) and Minnesota (MN) are two leading sugar beet producing states in the US jointly contributing 57% of domestic production, which results in over $5 billion in total economic activities. Sugar beet plant samples that had typical wilting and root rot symptoms were collected from Hickson, ND and Foxhome, MN in 2020. A fungus was isola...

Minnesota is the top sugar beet (Beta vulgaris L.) producing state in the United States. In 2020, sugar beet plants were observed for the first time in which the two to three oldest leaves had light brown to dark brown necrotic leaf lesions that eventually became yellow or brown and died but remained attached to the plant. Morphological data and se...

In May 2019, sugar beet (Beta vulgaris L.) seedlings with symptoms of wilting and root tip discoloration and necrosis were found in Moorhead (46.5507° N, 96.4208° W), Minnesota, USA. Roots of infected seedlings were surface sterilized with 10% bleach for 15 seconds, rinsed with sterile distilled water and cultured on water agar (MA Mooragar®, Inc,...

Rhizoctonia solani is a major pathogen of sugar beet (Beta vulgaris L.) which causes seedling damping-off, and root and crown rot of older plants. Growers use cultural practices, partially resistant cultivars, and fungicides to manage R. solani. There has not been much success in using biological control for this pathogen in sugar beet. Our objecti...

Rhizoctonia solani causes damping-off, and root and crown rot of sugar beet (Beta vulgaris L.) and may cause significant yield loss. Most research to understand the aggressiveness of R. solani is typically done using R. solani inoculum grown on sterilized grains such as barley. Since the pathogen is known to overwinter as sclerotia and mycelia, a s...

Cercospora beticola causes Cercospora leaf spot (CLS), a destructive foliar disease of sugar beet (Beta vulgaris) resulting in significant reduction in yield and quality. Ethylene bis-dithiocarbamate (EBDC) fungicides are recommended for the control of CLS. However, rainfall may wash off these protectant fungicides and reduce their efficacy. Adjuva...

Minnesota is the top sugar beet (Beta vulgaris L.) producing state in the United States. In September 2018, foliar symptoms were first observed on older sugar beet leaves in about 3% of the cultivars in a coded variety trial in Renville (N 44.78, W -95.15), Minnesota. Symptoms were dark brown circular or irregular spots on healthy plants. Initially...

Rhizoctonia solani Kühn is a genetically complex soil borne pathogen that causes pre and post-emergence damping off to a wide range of crops. However, its life cycle and pathogenesis is not thoroughly well characterized. The primary form of the pathogen in nature is mycelia. This pathogen can survive in soil for many years through forming sclerotia...