ContacToxicity of Six Plant Extracts to Different Larval Stages of Colorado Potato Beetle (Leptinotarsa decemlineata SAY (Col: Chrysomelidae))

Authors : Mustafa Alkan, Ayhan Gökçe, Kenan Kara

Pages : 309-316

Doi:10.15832/ankutbd.447616

View : 19 | Download : 7

Publication Date : 2017-09-01

Article Type : Research Paper

Abstract :Discovery of new eco-friendly methods for insect pest management is very important in integrated pest management program. Contact toxicity of six plant extracts i.e. Acanthus dioscoridis L. insert ignore into journalissuearticles values(Acanthaceae);, Achillea millefolium L. insert ignore into journalissuearticles values(Asteraceae);, Bifora radians Bieb. insert ignore into journalissuearticles values(Apiaceae);, Heracleum platytaenium Boiss insert ignore into journalissuearticles values(Apiaceae);, Humulus lupulus L. insert ignore into journalissuearticles values(Cannabaceae); and Phlomoides tuberosa insert ignore into journalissuearticles values(L.); Moench insert ignore into journalissuearticles values(Lamiaceae);, were tested on the 1st to 4th instar larvae of Colorado potato beetle insert ignore into journalissuearticles values(Leptinotarsa decemlineata Say. insert ignore into journalissuearticles values(Coleoptera: Chrysomelidae););. The H. platytaenium and H. lupulus extracts were the most effective among the tested extracts, so dose-response bioassay was carried out only with H. lupulus and H. platytaenium against larval stages of Colorado potato beetle. The H. platytaenium extract was the most effective extract with calculated LD50 values 0.126, 0.204, 0.206 and 0.458 μL insect-1, LD90 values were calculated as 0.345, 0.342, 0.402, 0.566 μL insect-1 for 1st, 2nd, 3rd and 4th instars larvae respectively. These results indicate that H. platytaenium and H. lupulus extracts have great potentials as insecticides in the management of larvae of L. decemlineata. 
Keywords : Colorado potato beetle, Plant extracts, Heracleum platytaenium, Humulus lupulus, Contact toxicity