Ovipositional responses of Cryptolaemus montrouzieri Mulsant (Coleoptera: Coccinellidae) to the presence of prey, Maconellicoccus hirsutus (Green)

摘要

Studies to understand the influence of prey-specific cues on the clutch size of predatory coccinellid, Cryptolaemus montrouzieri Mulsant (Coleoptera: Coccinellidae) were carried out under laboratory conditions to determine factors which act as positive ovipositional cues to the female. Correlation analysis between the clutch size and the oviposition time indicated that the clutch size is influenced by prey specific cues like prey eggs and honeydew. The regression analysis also explained the maximum variability in the clutch size in the presence of prey specific cues viz., prey eggs along with honeydew (y = 0.2725x + 3.5593; R~2 = 0.8742; 0.94**); prey eggs along with exuviae and honeydew (y = 0.2865x + 3.2844; R~2 = 0.8384; r = 0.92**) and prey eggsalone (y = 0.257x + 3.7467; R~2 = 0.7805; r = 0.88**). The study indicated that prey specific cues like prey eggs and honeydew serve as positive ovipositional cues for gravid C. montrouzieri.