Insecticidal activity of four essential oils against cabbage worm, Crocidolomia pavonana Zeller (Lepidoptera:Pyralidae)
2015
Javier, A.M.V. | Ocampo, V.R. | Ceballo, F.A. | Javier, P.A.
Essential oils (EOs) from plants play a major role in insect pest management exhibiting their insecticidal effects in several ways including contact toxicity, antifeedant activity and repellency and growth regulation. EOs from Lantana camara (L.), Coleus ambionicus (Loureiro), Alpinia pyramidata (Blume) and Curcuma longa (L.) were evaluated for their insecticidal activities against third larval instar of cabbage worm, Crocidoloma pavonana (Zeller). Among the four EOs, L. camara was the most toxic to cabbage worm when applied typically (LD 50 = 215.90 ugg sup 1). It also provided the highest antifeedant activity at 1000 ppm with moderate RFI. EO from C. longa ranks second in providing toxicity through LRFM (LC 50 = 579.18 ppm) and also showed the highest repellency at 500 ppm. EOs from C. amboinicus showed remarkable insect growth regulatory (IGR) activity expressed in high larval-pupal intermediates and high abnormality among the pupal and adults produced.
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