caa a22 4500 467889759 CHVBK 20180406152745.0 cr unu---uuuuu 170328e20061201xx s 000 0 eng 10.1007/s00049-006-0342-z doi (NATIONALLICENCE)springer-10.1007/s00049-006-0342-z Chemical defense of the ladybird beetle Epilachna paenulata [Elektronische Daten] [Soledad Camarano, Andrés González, Carmen Rossini] Summary.: The defensive chemistry of the ladybird beetle Epilachna paenulata (Coleoptera: Coccinellidae) was characterized as a mixture of piperidine, homotropane and pyrrolidine alkaloids. Whole body extracts of adult beetles contain four major alkaloids: 1-(6-Methyl-2,3,4,5-tetrahydro-pyridin-2-yl)-propan-2-one; 1-(6-methyl-2-piperidyl)-propan-2-one; 9-aza-1-methyl-bicyclo[3.3.1]nonan-3-one and 1- (2′′- hydroxyethyl)-2-(12′-aminotridecyl)-pyrrolidine. Comparative studies of the defensive chemistry of eggs, larvae, pupae and adults showed both qualitative and quantitative differences in alkaloid composition among the four life stages, and also within adult age. Laboratory predation bioassays with wolf spiders showed that the adults are better protected than the larvae and pupae. Field tests showed the adult alkaloid extract to be deterrent to ants. Birkhäuser Verlag, Basel, 2006 Epilachna paenulata nationallicence Coleoptera nationallicence Coccinellidae nationallicence alkaloids nationallicence chemical defenses nationallicence ontogenetic variation nationallicence Camarano Soledad Departamento de Química Orgánica, Facultad de Química, Universidad de la República, Gral. Flores 2124 CP, 11800, Montevideo, Uruguay aut González Andrés Departamento de Química Orgánica, Facultad de Química, Universidad de la República, Gral. Flores 2124 CP, 11800, Montevideo, Uruguay aut Rossini Carmen Departamento de Química Orgánica, Facultad de Química, Universidad de la República, Gral. Flores 2124 CP, 11800, Montevideo, Uruguay aut CHEMOECOLOGY Birkhäuser-Verlag; www.birkhäuser.ch 16/4(2006-12-01), 179-184 0937-7409 16:4<179 2006 16 49 https://doi.org/10.1007/s00049-006-0342-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00049-006-0342-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Camarano Soledad Departamento de Química Orgánica, Facultad de Química, Universidad de la República, Gral. Flores 2124 CP, 11800, Montevideo, Uruguay aut NATIONALLICENCE 700 1- González Andrés Departamento de Química Orgánica, Facultad de Química, Universidad de la República, Gral. Flores 2124 CP, 11800, Montevideo, Uruguay aut NATIONALLICENCE 700 1- Rossini Carmen Departamento de Química Orgánica, Facultad de Química, Universidad de la República, Gral. Flores 2124 CP, 11800, Montevideo, Uruguay aut NATIONALLICENCE 773 0- CHEMOECOLOGY Birkhäuser-Verlag; www.birkhäuser.ch 16/4(2006-12-01), 179-184 0937-7409 16:4<179 2006 16 49 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer