TABLE 2.
Selected EPG variables associated with ingesting xylem or phloem along with three variables that showed a difference in behavior between healthy and CLas-infected psyllids on plantsa
| Variable name |
CLas-infected psyllids |
Healthy psyllids |
F | Pr > F | ||||
|---|---|---|---|---|---|---|---|---|
| n | Mean | SD | n | Mean | SD | |||
| NumG | 25 | 5.52 | 4.86 | 27 | 6.19 | 4.04 | 0.29 | 0.5926 |
| MeanG | 25 | 1,757.7 | 1,681.0 | 27 | 1,383.5 | 675.5 | 1.14 | 0.2907 |
| PrcntPrbG | 25 | 18.53 | 20.01 | 27 | 16.58 | 10.10 | 0.01 | 0.9232 |
| NumE2 | 25 | 2.08 | 3.00 | 27 | 1.59 | 1.91 | 0.1 | 0.7581 |
| NumLngE2 | 25 | 1.68 | 2.30 | 27 | 1.41 | 1.67 | 0.03 | 0.8596 |
| MnDurE2 | 14 | 5,463.2 | 2,242.7 | 16 | 9,402.7 | 9,888.7 | 1.77 | 0.1944 |
| MaxE2 | 14 | 8,912.4 | 3,702.3 | 16 | 10,976.2 | 9,155.3 | 0.43 | 0.5157 |
| PrcntPrbE2 | 25 | 15.72 | 17.88 | 27 | 20.89 | 22.08 | 0.37 | 0.5435 |
| DurNnprbBfrFrstD | 15 | 9,659.6 | 6,619.3 | 18 | 19,327.4 | 10,892.2 | 9.69 | 0.004 |
| DurE1FlwdFrstSusE2 | 14 | 22.07 | 21.85 | 16 | 72.92 | 76.53 | 6.3 | 0.0181 |
| DurE1FlldFrstE2 | 14 | 25.65 | 22.69 | 16 | 72.47 | 76.88 | 4.55 | 0.0418 |
NumG, number of xylem ingestion events; MeanG, mean duration of xylem ingestion; PrcntPrbG, percentage of probing duration spent in xylem ingestion; NumE2, number of phloem ingestion events; NumLngE2, number of phloem ingestion events longer than 600 s; MnDurE2, mean duration of E2; MaxE2, longest recorded E2 for each insect; PrcntPrbE2, percentage of probing duration spent ingesting phloem; DurNnprbBfrFrstD, duration of nonprobing period before first phloem contact; DurE1FlwdFrstSusE2, duration of the phloem salivation event before first sustained (600+ s) phloem ingestion event; DurE1FlldFrstE2, duration of the phloem salivation event immediately before the first phloem ingestion event. All variables were calculated by insect, and the mean values are reported. Pr > F, the probability of a greater F statistic value under the null hypothesis.