Figure 1.
Response of D. citri to odors emitted from Las-infected versus non-infected citrus in a laboratory olfactometer.
Bars labeled by an asterisk are significantly different (χ2 test, p<0.05). n = total number of psyllids that responded.
Figure 2.
Settling preference of combined non-infected and Las-infected D. citri on Las-infected versus non-infected citrus plants.
Panel (A) shows response under light conditions and panel (B) shows response under dark conditions. Bars with the same letter are not significantly different (Tukey's HSD test, p<0.05).
Figure 3.
Movement of previously settled D. citri from Las-infected to non-infected citrus plants.
Red bars show the response of Las-infected psyllids and blue bars show the response of non-infected psyllids; no significant differences were detected between psyllid types within plant treatments. Pairs of bars representing plant treatment combinations labeled with different letters are significantly different from one another (Tukey's HSD test, p<0.05).
Table 1.
Las infection status of inserted plants and Diaphorina citri migrating from initial point of forced settling to subsequently inserted plant treatments.
Table 2.
Differing levels of various nutrients between Las-infected and non-infected Citrus sinensis plants.
Figure 4.
Feeding efficiency of D. citri on Las-infected versus non-infected citrus leaves as measured by honeydew excretion.
Bars labeled with different letters are significantly different from one another (Tukey's HSD test, p<0.05).
Figure 5.
Chromatograms displaying volatile differences between Las-infected and non-infected plants.
Release of methyl salicylate was significantly greater from plants infected with Las, while release of D-limonene and methyl anthranilate was significantly greater from non-infected plants.
Table 3.
Volatiles from Las-infected and non-infected citrus plants presented as average percentage ±1 standard error (SE) of n-octane equivalents of volatile organic compounds collected from plants' headspace.
Table 4.
Responses of Diaphorina citri when assayed with synthetic volatiles identified from Las-infected and non-infected citrus plants.