Table 1. Escape behaviour of four life stages of Empoasca onukii in response to water spraying.
Stage | Behaviour/outcome | Proportional rate of successful escape (n = 20) | Mean escape time of escaped individuals (s) |
---|---|---|---|
N1 | All trapped in the water and rapidly washed away | 0 | — |
N2~N3 | Most trapped in water droplets and able to crawl from droplets only slowly after cessation of spraying | 0.15 | 48.7 ± 3.05 |
N4~N5 | Minority trapped in water droplets and able to crawl from droplets relatively rapidly after cessation of spraying | 0.85 | 17.4 ± 2.78 |
Adult | Jumping away during spraying | 1.0 | 0.26 ± 0.02 |
Water was sprayed for 1 minute to adults and immatures of various nymphal (N) stages. The proportional rate of successful escape was calculated in the 2 minutes after the cessation of spraying for 1 min.