Figure 4: Average number of whitefly eggs, crawlers or nymphs (±SE)
counted on leaf discs from the 6th or
9th leaf of tomato plants grown under control light
conditions (CL) or CL with supplemental far-red light (+FR). Whitefly
numbers in all three life stages were significantly affected by light
treatment (Eggs: df = 1, F = 38.44, p < 0.001; Crawlers: df =
1, F = 11.72, p < 0.001; Nymphs: df = 1, F = 14.41, p
< 0.001) and leaf number (Eggs: df = 1, F = 97.70, p
< 0.001; Crawlers: df = 1, F = 86.01, p < 0.001;
Nymphs: df = 1, F = 172.78, p < 0.001). A significant
interaction between light treatment and leaf number was only observed
for nymphs (Eggs: df = 1, F = 2.15, p = 0.146; Crawlers: df = 1, F =
0.16, p = 0.690; Nymphs: df = 1, F = 10.46, p = 0.002). Results were not
affected by the experimental replicates (Eggs: df = 1, F = 0.02, p =
0.880; Crawlers: df = 1, F = 0.53, p = 0.470; Nymphs: df = 1, F = 0.04,
p = 0.835) or plant ID (Eggs: df = 1, F = 0.01, p = 0.933; Crawlers: df
= 1, F = 0.14, p = 0.706; Nymphs: df = 1, F = 0.22, p = 0.63). Leaf 6:
CL n = 30, +FR n = 30; Leaf 9: CL n = 30, +FR n = 27.