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The New Zealand leafroller Cnephasia jactatana Walker is an important pest of kiwifruit. Larvae of this species feed on dead or live plant tissues and damage the surface of the fruit or burrow deep into the flesh. To provide important information for the development of adult monitoring and control methods, we studied circadian rhythms and lifespan activity patterns of C. jactatana. The investigation was carried out at 20 ∠ 2°C, 75 ∠ 10% RH and a photoperiod of 16:8 h light:dark. Females needed a significantly longer time to complete their life cycle than males. Most moths emerged during the photophase. On a circadian basis, courtship activity peaked 3 and 6 h into scotophase; mating peaked 4-6 h into scotophase and most ovipositions occurred in the first 2 h of scotophase. In the lifespan of this species, male courtship display started 2 days after emergence and peaked 1 day later; mating and oviposition peaked 3 and 7 days after emergence, respectively. Most females initiated oviposition 1 day after mating.

proceedings of the new zealand weed and pest control conference/new zealand plant protection/proceedings of the ... national weeds conference/proceedings of the new zealand weed control conference/proceedings of the new zealand plant protection conference

Adult activity patterns of <i>Cnephasia jactatana</i> Walker (Lepidoptera Tortricidae)