New Record of the Haplothrips sp., (Haplothrips gowdeyi Franklin and Haplothrips ganglbaueri Schmutz) in Chilli Ecosystem from South India
摘要
This study describes the first confirmed report of Haplothrips gowdeyi and Haplothrips ganglbaueri infesting chilli crops in South India. Field surveys were carried out across major chilli-growing regions of South India. Using both morphological keys and sequencing the Cytochrome c oxidase subunit I (COI) gene (GenBank Nos. PV426453 and PV426463), the pests were identified as H. gowdeyi and H. ganglbaueri in chilli crops, alongside Thrips parvispinus. Furthermore, molecular phylogeny identified two main clades of H. gowdeyi in India, demonstrating regional variation despite strong genetic conservation. The occurrence of H. gowdeyi in chilli fields aligns with its known ecological flexibility, whereas the detection of H. ganglbaueri, a species previously associated with grasses, suggests a possible host shift to chilli. However, the study faced challenges in assessing the direct yield loss due to the sporadic and overlapping presence of multiple thrips species, making it difficult to isolate the specific impact of Haplothrips spp. Although quantitative yield loss estimation was not undertaken, the detection of H. gowdeyi and H. ganglbaueri highlights their potential to contribute to crop damage, justifying the need for targeted monitoring and further impact studies. These findings highlight the evolution of the thrips complex in chilli ecosystems, as well as the need of integrating morphological taxonomy with molecular tools for accurate pest diagnosis.