Prediction of emergence of first-instar Ricania shantungensis (Hemiptera: Ricaniidae) in persimmons

An invasive species, Ricania shantungensis Chou & Lu 1977 (Hemiptera: Ricaniidae), poses a threat to persimmons in Korea. Pesticide application was the most effective when targeting newly hatched nymphs. Therefore, this study was conducted to develop a degree-day model to predict the emergence o...

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Main Authors: Sunghoon Baek, Min-Jung Kim, Hwa-Young Seo, Chang-Gyu Park
Format: Article
Language:English
Published: Taylor & Francis Group 2025-12-01
Series:Cogent Food & Agriculture
Subjects:
Online Access:https://www.tandfonline.com/doi/10.1080/23311932.2025.2451061
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author Sunghoon Baek
Min-Jung Kim
Hwa-Young Seo
Chang-Gyu Park
author_facet Sunghoon Baek
Min-Jung Kim
Hwa-Young Seo
Chang-Gyu Park
author_sort Sunghoon Baek
collection DOAJ
description An invasive species, Ricania shantungensis Chou & Lu 1977 (Hemiptera: Ricaniidae), poses a threat to persimmons in Korea. Pesticide application was the most effective when targeting newly hatched nymphs. Therefore, this study was conducted to develop a degree-day model to predict the emergence of first-instar R. shantungensis, the pesticide application timing, in persimmons. To estimate the lower developmental threshold, thermal requirement, and developmental rate, R. shantungensis eggs were collected from two locations and hatched at seven constant temperatures (12.4, 16.4, 20.4, 24.8, 28.3, 32.4, and 36.9 °C). The estimated lower developmental threshold and thermal constant were 12.0 °C and 159.9 degree-days, respectively. The developmental rates (the reciprocal of developmental times (days)) were 0.0264, 0.0526, 0.0818, 0.1001, and 0.1051 at 16.4, 20.4, 24.8, 28.3, and 32.4 °C, respectively. Based on these results, a degree-day model was developed and validated under field conditions. This model may increase the efficiency of R. shantungensis management in persimmon fields.
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institution Kabale University
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spelling doaj-art-18951434aec14488ac70148cdb223e7d2025-01-16T07:51:47ZengTaylor & Francis GroupCogent Food & Agriculture2331-19322025-12-0111110.1080/23311932.2025.2451061Prediction of emergence of first-instar Ricania shantungensis (Hemiptera: Ricaniidae) in persimmonsSunghoon Baek0Min-Jung Kim1Hwa-Young Seo2Chang-Gyu Park3Department of Agriculture and Fisheries Convergence, Korea National University of Agriculture and Fisheries, Jeonju-Si, Republic of KoreaForest Entomology and Pathology Division, National Institute of Forest Science, Seoul, Republic of KoreaDepartment of Environmentally Friendly Agriculture, Chungnam Agricultural Research and Extension Services, Yesan-Si, Republic of KoreaDepartment of Agriculture and Fisheries Convergence, Korea National University of Agriculture and Fisheries, Jeonju-Si, Republic of KoreaAn invasive species, Ricania shantungensis Chou & Lu 1977 (Hemiptera: Ricaniidae), poses a threat to persimmons in Korea. Pesticide application was the most effective when targeting newly hatched nymphs. Therefore, this study was conducted to develop a degree-day model to predict the emergence of first-instar R. shantungensis, the pesticide application timing, in persimmons. To estimate the lower developmental threshold, thermal requirement, and developmental rate, R. shantungensis eggs were collected from two locations and hatched at seven constant temperatures (12.4, 16.4, 20.4, 24.8, 28.3, 32.4, and 36.9 °C). The estimated lower developmental threshold and thermal constant were 12.0 °C and 159.9 degree-days, respectively. The developmental rates (the reciprocal of developmental times (days)) were 0.0264, 0.0526, 0.0818, 0.1001, and 0.1051 at 16.4, 20.4, 24.8, 28.3, and 32.4 °C, respectively. Based on these results, a degree-day model was developed and validated under field conditions. This model may increase the efficiency of R. shantungensis management in persimmon fields.https://www.tandfonline.com/doi/10.1080/23311932.2025.2451061PersimmonRicania shantungensistemperature-dependent developmentdegree-day modelforecasting modelAgriculture & Environmental Sciences
spellingShingle Sunghoon Baek
Min-Jung Kim
Hwa-Young Seo
Chang-Gyu Park
Prediction of emergence of first-instar Ricania shantungensis (Hemiptera: Ricaniidae) in persimmons
Cogent Food & Agriculture
Persimmon
Ricania shantungensis
temperature-dependent development
degree-day model
forecasting model
Agriculture & Environmental Sciences
title Prediction of emergence of first-instar Ricania shantungensis (Hemiptera: Ricaniidae) in persimmons
title_full Prediction of emergence of first-instar Ricania shantungensis (Hemiptera: Ricaniidae) in persimmons
title_fullStr Prediction of emergence of first-instar Ricania shantungensis (Hemiptera: Ricaniidae) in persimmons
title_full_unstemmed Prediction of emergence of first-instar Ricania shantungensis (Hemiptera: Ricaniidae) in persimmons
title_short Prediction of emergence of first-instar Ricania shantungensis (Hemiptera: Ricaniidae) in persimmons
title_sort prediction of emergence of first instar ricania shantungensis hemiptera ricaniidae in persimmons
topic Persimmon
Ricania shantungensis
temperature-dependent development
degree-day model
forecasting model
Agriculture & Environmental Sciences
url https://www.tandfonline.com/doi/10.1080/23311932.2025.2451061
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