Fig. 4
From: Behavioral changes in the brown planthopper, Nilaparvata lugens, mediated by melatonin
Distribution of copulation events of Nilaparvata lugens in 10 days (mean ± SE). The observations started at 0:00 a.m., the day after eclosion. Photoperiod (5:00–18:59 light by LED lights, artificial daytime, 19:00–4:59 with darkness, artificial nighttime, China standard time). Different lowercase letters signed in the same day mean significant differences, for day 1–6, LSD, P < 0.05; for the day 7, t test, P < 0.05