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Zhang, Gui‐fen; Xian, Xiao‐qing; Zhang, Yi‐bo; Liu, Wan‐xue; Liu, Hui; Feng, Xiao‐dong; Ma, De‐ying; Wang, Yu‐sheng; Gao, You‐hua; Zhang, Rong; Li, Qing‐hong; Wan, Fang‐hao; Fu, Wen‐jun; Wang, Jun; Kuang, Meng; Yang, Wen‐jia; Rao, Xi; Gao, Ying; Dai, Ai‐mei
Pest management science, December 2021, 2021-12-00, 20211201, Letnik: 77, Številka: 12Journal Article
BACKGROUND In 2017 Tuta absoluta was identified as an invasive species in China. Due to its rapid geographic expansion and the severe crop damage it causes, T. absoluta poses a serious threat to China's tomato production industry. To determine its geographic distribution and host range, intensive surveys and routine monitoring were conducted across the Chinese mainland between 2018 and 2019. The population colonization coefficient (PCC; ratio of colonized sites and prefectures) and population occurrence index (POI; ratio of infested host species and PCCs) were calculated. RESULTS In northwestern China, T. absoluta populations established in Xinjiang exhibited a medium PCC value (~0.03). In southwestern China, populations in Yunnan and its five neighboring provinces exhibited high (~0.50 in Yunnan and Guizhou), or low (<0.02 in Guangxi, Sichuan, Hunan, and Chongqing) PCC values. In the Chinese mainland, infestations of four crop plant species (tomato, eggplant, potato, and Chinese lantern) and two wild plant species (black nightshade and Dutch eggplant) were identified; tomatoes were infested in every colonized province. Chinese lantern and Dutch eggplant are potentially novel hosts. Yunnan, Guizhou, and Xinjiang experienced the most serious damage (POI). In southwestern China, observed damage significantly decreased with increased distance from the first discovery site of T. absoluta to the farthest county of an infested province increased. CONCLUSION T. absoluta populations are well‐established and could potentially spread to other regions of China. The present study helps to inform the establishment of better pest management guidelines and strategies in China and tomato‐producing regions worldwide. © 2021 Society of Chemical Industry. Tuta absoluta expanded to seven of the 31 provinces in the Chinese mainland in fewer than 3 years. Tomatoes were infested in all the colonized provinces. The Chinese lantern and Dutch eggplant might be novel hosts of this pest.
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