Identification techniques for cryptic insect species and their applications in pest control and biodiversity conservation
Cryptic species within insects,which are morphologically similar but reproductively isolated,pose significant challenges to species identification and related research. Increasing attention has been directed towards the study of cryptic insect species. Based on a review of 368 selected Chinese litera-ture sources,this paper comprehensively summarizes identification methods of cryptic insect species,along with their potential applications. Since the introduction of DNA barcoding technology in 2003,re-search on the taxonomy of cryptic insect species has notably escalated. At present,four primary taxo-nomic methods are utilized:molecular taxonomy (298 papers,80.98％ ),ecological taxonomy (191 pa-pers,51.90％ ),biochemical taxonomy (four papers,1.09％ ),and cytological taxonomy (four papers,1.09％ ). The majority of have relied on a single taxonomic method (241 papers,65.49％ ),with molecu-lar taxonomy being the most prevalent (172 papers,46.74％ ),followed by ecological taxonomy (64 pa-pers,17.39％ ). Additionally,a substantial number of studies have employed a combination of two taxo-nomic methods simultaneously (125 papers,33.97％ ),with molecular and ecological taxonomy being the most commonly used (124 papers,33.70％ ). Fewer studies have integrated three or more taxonomic methods (two papers,0.54％ ). Applications of cryptic insect species identification included agricultural pest control (262 papers,71.20％ ),species diversity assessment (74 papers,20.11％ ),disease prevention and control (27 papers,7.34％ ),and habitat protection (six papers,1.63％ ). The exploration of cryptic in-sect species enhances understanding for effective pest control and species conservation efforts. This study advocates for the integration of a comprehensive taxonomic evaluation system in the future research on cryptic insect species,aiming to elucidate their evolutionary mechanism in taxonomic practices.
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