Table 1.
Stylet activities of R. padi during feeding on the seedling leaves of the tested maize cultivars.
| EPG Waveforms | EPG Activity | |||
|---|---|---|---|---|
| Number of Events | Total Duration (min) | Average Time (min) | Time to First Probing (min) | |
| Złota Karłowa cv. (susceptible) | ||||
| Np | 11.00 ± 4.71a | 53.42 ± 15.02b | 5.37 ± 2.13a | n/a |
| C | 19.93 ± 6.91a | 148.48 ± 62.01a | 7.90 ± 3.48a | 2.87 ± 1.77a |
| E1 | 9.33 ± 3.98a | 26.16 ± 20.69a | 2.80 ± 1.98a | 37.07 ± 10.71a |
| E2 | 6.73 ± 3.22a | 130.73 ± 75.24a | 23.88 ± 19.44a | 42.34 ± 11.22a |
| G | 1.20 ± 1.78a | 1.21 ± 128.62a | 0.46 ± 0.96b | 100.13 ± 142.93a |
| F | 0.00 ± 0.00b | 0.00 ± 0.00a | 0.00 ± 0.00a | 0.00 ± 0.00b |
| Waza cv. (relatively resistant) | ||||
| Np | 12.80 ± 4.54a | 143.31 ± 57.83a | 12.53 ± 6.74a | n/a |
| C | 19.27 ± 7.78a | 152.04 ± 41.09a | 8.52 ± 2.63a | 4.77 ± 2.96a |
| E1 | 6.00 ± 4.05a | 3.87 ± 3.39b | 0.58 ± 0.26a | 82.64 ± 17.28a |
| E2 | 5.00 ± 3.07a | 22.65 ± 15.78b | 4.21 ± 2.96b | 83.32 ± 17.38a |
| G | 2.93 ± 2.02a | 37.66 ± 28.66a | 11.92 ± 5.65a | 81.23 ± 48.53a |
| F | 1.07 ± 0.59a | 0.47 ± 0.39a | 0.38 ± 0.29a | 88.64 ± 66.42a |
Data are presented from 6-h EPG recordings (mean ± SEM; n = 20). Values for each EPG waveform within a column followed by different letters are significantly different between maize cultivars (Mann-Whitney U test; p < 0.05). Np—non-probing; C—transition of the insect stylets through epidermis and mesophyll cells; E1—salivation into sieve elements; E2—phloem sap ingestion; G—xylem sap uptake; F—difficulties in stylet penetrations in tissues of the host plant; n/a—not applicable.