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An Ethogram for the Pre-reproductive Stages of the Green Peach Aphid, Myzus persicae
The Green Peach aphid, Myzus persicae Sulzer, is one of the most widespread insect pests worldwide. We established the ethogram of this species during the pre-reproductive period to understand the behavioral repertoire, organization of behaviors, and the context in which they occur. The behaviors that we observed include honeydew production (HDP), walking, wagging, pre-molting and molting. We noted the frequency and the amount of time for each behavior at different nymphal stages. As the nymphal stage increased, the rate of HDP decreased. The HDP seemed to occurred at regular duration and interval in each nymphal stage, while the wagging and walking seemed to be irregular behaviors. When wagging occurred before HDP, the successive HDP was significantly delayed, suggesting that aphids might not feed during wagging. Due to regularity through all nymphal-stages, HPD can be used for a good behavioral indicator in the related bioassay.
