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13. Whitefly‐Pathogenic Beauveria bassiana JEF‐507 as a Competitive Biopesticide, Chongchae‐Stop.

Author

Kim, Jong‐Cheol, Baek, Sehyeon, and Kim, Jae Su

Abstract

ABSTRACT Silverleaf whitefly, Bemisia tabaci (Hemiptera: Aleyrodidae), is a destructive insect pest damaging to diverse crops by vectoring several plant pathogenic viruses, which consequently causes economic losses in crop production. As the resistance of whiteflies to chemical insecticides is increasing, this study aimed to investigate the potential of entomopathogenic fungi as an alternative. A total of 72 entomopathogenic fungal isolates, collected from soils using Tenebrio molitor larvae as an insect baiting method, were assessed for their virulence against 2nd nymphs of whitefly. Their virulence was assayed by dipping whitefly‐infested tomato leaves in fungal conidia suspensions at 1.0 × 107 conidia/mL. Among the tested isolates, two isolates of Beauveria bassiana JEF‐462 and JEF‐507 showed high virulence. In the assessment of virulence depending on conidia concentrations, the estimated LC50 values for JEF‐462 and JEF‐507 were similarly 8.7–14.0 × 107 conidia/mL. However, B. bassiana JEF‐507 showed higher conidial productivity and thermotolerance on most of tested 12 grain substrates than B. bassiana JEF‐462, and millet was the most suitable grain substrate. Additionally, siloxane as a surfactant was able to sufficiently exhibit the insecticidal activity of JEF‐507 against whitefly nymphs compared with other surfactants. In a pot‐based greenhouse trial, JEF‐507 showed higher control efficacy than chemical insecticides, dinotefuran and spinetoram. This work suggests that B. bassiana JEF‐507 could be competitively used as a biopesticide to control silverleaf whiteflies while overcoming current resistance issues. The JEF‐507 isolate has been registered in Korea, 2022 and successfully commercialised as the name of Chongchae‐Stop in this local market to control whitefly and thrips. [ABSTRACT FROM AUTHOR]

Published
2024
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28. Digital application of three‐dimensional diagnosis and treatment with a virtual articulator.

Author

Lee, Kyungmin Clara, Park, Jae Hyun, Kim, Jong‐Cheol, Lee, Sangmi, Moon, Danal, and Lee, Gye‐Hyeong

Subjects
TREATMENT of malocclusion, MALOCCLUSION, ORTHODONTICS, FACE, TEMPOROMANDIBULAR disorders, DIGITAL technology, COMPUTER software, DIGITAL health, COMPUTED tomography, PRODUCT design, DENTAL casting, CORRECTIVE orthodontics, PHOTOGRAPHY, PERIODONTAL splints, THREE-dimensional printing, MANDIBLE, ACCURACY, SENSITIVITY & specificity (Statistics)
Abstract

Objective: The purpose of this article was to introduce a method for the digital application of three‐dimensional (3D) diagnosis and treatment with a virtual articulator and 3D data. Clinical Consideration: With the use of cone‐beam computed tomography (CBCT) and intraoral and facial scans, we can create a virtual articulator and evaluate the mandibular position in maximum intercuspation and centric‐related occlusion for the patient with an unstable occlusion and temporomandibular disorders (TMD). Based on this, we treated a case using a digital mandibular position indicator (MPI) and fabricated a stabilization splint using a 3D printer. This approach eliminates the traditional impression or model mounting process and the analog face bow transfer. Furthermore, the design of the stabilization splint is accomplished using software. Conclusions: The approach outlined in this article offers the potential for a digital diagnosis and treatment process by seamlessly integrating CBCT, intraoral scans, and facial scans with a high degree of accuracy. This may enhance precision in diagnosis and treatment planning, especially for patients with complicated TMD, in addition to facilitating effective communication with orthodontic patients who require thorough attention. Clinical Significance: Utilizing a virtual articulator and digital MPI for the occlusal evaluation of patients with TMD and unstable occlusion makes it possible to diagnose and analyze the occlusal condition accurately. This approach also allows for precision and efficiency in treatment. [ABSTRACT FROM AUTHOR]

Published
2024
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