02024naa a2200253 a 450000100080000000500110000800800410001902400270006010000190008724501580010626000090026452012310027365000240150465000140152865000170154270000200155970000200157970000200159970000190161970000220163870000210166070000200168177300690170121283982021-03-31       2020    bl uuuu     u00u1 u    #d7 a10.1111/jfd.132502DOI1 aPEREIRA, E. C.  aLethal concentration of Cymbopogon citratus (Poaceae) essential oil for Dolops discoidalis and Argulus sp. (CrustaceabArgulidae).h[electronic resource]  c2020  aThis study investigated the acute toxicity (LC50-24 hr) effects of the essential oil of Cymbopogon citratus for adult Argulus sp. and Dolops discoidalis, before and during oviposition. In vitro acute toxicity (LC50-24 hr) was tested using 20, 40, 60, 80, 100, 120, 140 and 160 ug/L of C. citratus essential oil, and two control groups (one with cultivation tank water and one with cultivation tank water + alcohol) were used. Specimens of Argulus sp. and D. discoidalis submitted to acute toxicity were evaluated using histological procedures. The major chemical compounds of C. citratus essential oil were geranial (47.5%), neral (35.6%) and myrcene (6.7%). The LC50-24 hr for Argulus sp. adults was 67.97 ug/L, while for D. discoidalis it was 59.55 µg/L. In the oviposition of both species of argulids, maximum mortality began with treatments of 140 ug/L, while the LC50-24 hr for Argulus sp. and D. discoidalis was 83.98 ug/L and 82.48 ug/L, respectively. In both argulid species exposed to C. citratus essential oil, morphological alterations were observed only in the eyes, and they occurred in the ommatidium and rhabdomeres and were dependent on the concentration of C. citratus essential oil and the parasite species.  aCymbopogon citratus  aParasites  aPhytotherapy1 aOLIVEIRA, E. C.1 aSOUSA, E. M. O.1 aSILVA, H. N. P.1 aCORRÊA, L. L.1 aMOURÃO, R. H. V.1 aTAVARES-DIAS, M.1 aSILVA, L. V. F.  tJournal of Fish Diseasesgv. 43, n. 12, p. 1497-1504, Dec. 2020.