Fig. 4. Release dynamics of 5-hydroxy-4-decanolide (total amounts) by N. vitripennis males during a 5-h sampling period (N=10). Each bar diagram represents the results from one individual male. Amounts released per hour are presented as the percentage of the total amount released in 5 h. Volatile sampling was performed during the photophase between 10:00 h and 18:00 h.