@article{fdi:010093497, title = {{DNA}-barcoding identification of a hitherto unreported defoliating geometrid species on acacia in the {G}reat {G}reen {W}all in {S}enegal : taxonomic challenges, genetic diversity, and additional threat to the plantations}, author = {{D}iop, {A}. and {J}ourdan, {H}erv{\'e} and {T}our{\'e}, {M}. and {R}amel, {J}. {M}. and {C}atania, {A}. and {B}arbier, {E}. and {F}ossoud, {A}mandine and {B}al, {A}. {B}. and {S}all, {S}. {N}. and {G}authier, {N}athalie}, editor = {}, language = {{ENG}}, abstract = {{W}hen encountering an insect species that targets high-value plants, such as acacia in large-scale tree programs like the {G}reat {G}reen {W}all ({GGW}), it is essential to assess the phytosanitary risks associated with this species. {W}hen it has not previously been described locally, accurate taxonomic identification is a crucial pre-requisite. {T}he {DNA}-barcoding approach is relevant for delineating and assigning unidentified specimens to species or molecular operational taxonomic units already listed in reference {DNA} databases. {F}rom 2020 to 2023, in the {F}erlo region of {S}enegal, where {GGW}'s reforestation activities were implemented, a defoliator caterpillar species not previously reported in the region was observed causing damage to three indigenous acacia species ({V}achellia tortilis raddiana, {V}. nilotica, {S}enegalia senegal). {T}he barcoding approach coupled with external and/or internal morphological observations of the various stages collected enabled us to assign the specimens to {I}sturgia pulinda deerraria ({G}eometridae) but confronted us with the ongoing nomenclatural problem associated with this taxon. {I}nterestingly, based on 122 mitochondrial barcode sequences (78 from our study, 44 retrieved from genetic databases), high intraspecific genetic diversity was revealed both in {S}enegal and worldwide, with two weakly divergent geographical lineages, an {A}frican-{E}astern lineage and a {M}editerranean lineage. {T}he observation of the species from 2020 to 2023, both at the end of the rainy season and during the dry season on nurseries or plantations of acacia ({F}abaceae) in the 5 localities studied and incidentally on {M}oringa oleifera ({M}oringaceae) suggests that, even at low numbers, it could pose an additional biotic threat to woody vegetation-based programs.}, keywords = {{A}cacia spp ; {E}merging insect pest ; {G}enetic diversity ; {G}reat {G}reen {W}all ; {I}sturgia pulinda deerraria ; {T}axonomy ; {SENEGAL}}, booktitle = {}, journal = {{P}hytoparasitica}, volume = {53}, numero = {3}, pages = {52 [23 p.]}, ISSN = {0334-2123}, year = {2025}, DOI = {10.1007/s12600-025-01269-4}, URL = {https://www.documentation.ird.fr/hor/fdi:010093497}, }