Electroantennogram Response of Helicoverp armigera Hubn and its predator Chrysoperla carnea Steph. to volatiles of different varieties of cotton and sunflower

Electroantennogram (EAG) response of male and female adults of Helicoverpa armigera Hubn and predator Chrysoperla carnea was recorded for leaf and bolls extract of different varieties of cotton and sunflower. Among the sexes, female showed more response than males. Among the varieties AK-235 and Adonicum recorded higher EAG response but least response was recorded in the variety Ak-227. In case of C.carnea the varieties Goarani-6, Indore-1, Badnawar and Andrews showed better response than other. Boll varieties extracts like K-6 recorded more response. Among the sunflower varieties KBSH-1 recorded more response. Least response was noted in the variety KBHH-1. In case of C.carnea males showed higher response than females. Sungen-85 variety showed more response. The EAG response was higher in hexanol, alpha pinene and caryophyllene in case of C.carnea, while H.armigera showed higher response to hexanol, pentanol and Caryophyllene oxide. Over all, hydrocarbons form a major part of the compound present in the hexane extract of sun flower leaves followed by terpinenes. In case of hexane extracts of cottonbolls, terpinenes, isoterpines, cymene and caryophyllene were found in traces, while alpha and betapinene, myrcene, coamphene, limonene, octane and terpinene were found as major chemicals.