An importance pest (Drosophila suzukii Matsumura) : Its researchstatus at home and abroad based on bibliometric analysis

Abstract：【Objective】This study aims at comprehensively and objectively revealing the research status and developmental trend of Drosophila suzukii Matsumura that has recently invaded in many American and European countries and caused severe economic loss to soft and stone fruits, calling a great attention by many associated sectors and research institutes to this pest.【Methods】With Chinese CNKI, VIP and Wanfang and Web of Science database as the data sources, the statistical analysis was performed on the number of associated papers, paper types, journals, foundation types, top 10 cited papers and the main institutes and countries that publishing the papers related to D. suzukii during 2005 to 2017.【Results】Total 118 Chinese and 305 English papers were searched respectively, and the numbers of both Chinese and English published papers of D. suzukii were increased year by year. The journal of ChinaPlant Protection published most Chinese papers related to D. suzukii among Chinese journals, and the Chinese Journal of Applied Entomology came second. Moreover, the Journal of Pest Science published most English papers related to D. suzukii, and its h-index was 11 papers higher than other journals. Additionally, the Journal of Economic Entomology occupied second position considering the number of published papers related to D. suzukii and the journal of Pest Management Science came third. However, the papers published in the journal of Pest Management Science had most total cited times and mean cited times (per paper) . This demonstrated that the research findings published in the journal of Pest Management Science attracted more attention from the scientific communities even though this journal did not publish the most papers related to this pest. Furthermore, a majority of English papers were published in form of research article including many research fields, while 37% Chinese papers were published in form of review and intensively elaborated the occurrence regularity and control methods of this pest in China and 42% Chinese papers were published in form of research article. Moreover, Shandong Academy of Agricultural Sciences published most Chinese papers with total 16 papers, and Yunnan Agricultural University came second with 12 papers published. The United States Department of Agriculture (USDA) published total 60 papers and ranked first, followed by Oregon State University and Oregon University System with publishing 42 and 41 papers, respectively. The h-index of these three institutes entirely showed a peak at 19, and total cited times of research articles from these institutes were more than 1 200. Among top 10 institutes that published most English papers related to D. suzukii based on Web of Science, nine institutes came from America. Considering the number of published papers related to D. suzukii, America published total 145 papers over last decade and ranked first, followed by Italy and Canada with 50 and 25 papers publishied, respectively. Considering h-index, total cited times and mean cited times (per year) , the U.S.A. was far ahead of all the countries. China published only seven papers related to D. suzukii and ranked thirteenth. With respect to top 10 cited Chinese papers on D. suzukii based on CNKI database, three papers were review articles and other seven were research papers. which focused on the biology and management strategies of this pest. As to top 10 cited English papers on D.suzukii based on Web of Science, seven ones were research articles that concentrated on distribution, spread and control methods of this pest, and six papers were published in the journal of Pest Management Science. Total 46 Chinese papers were financially supported, accounting for 49.46% in all published Chinese papers. A majority of papers was funded by local governments of Shandong, Gansu and Yunnan province, accounting for 23.66%. Total 18 papers were funded by two or more foundations.【Conclusion】Few institutes and researchers in China studied the D. suzukii, the research content is simple and scattered, and few researches were financially supported by the associated departments; Moreover, Chinese researchers published few and low-quality English papers in name of first author. The American researchers did the excellent work on this notorious pest, having published most and highquality English papers on this pest. The research status on D. suzukii in China is far behind of other counties like U.S.A., even though this pest was recorded in China as early as in 1937.