Figure 10. Disease progression on potato plants after psyllid exposure.

A. Atlantic plants exposed for 2.5 weeks to low-CLs psyllids, no drastic symptoms were observed, and plants appear normal at the end of experiment. B. Atlantic plants exposed for 9 weeks with the low-CLs psyllid colony, disease progression is visible by leaf edges curling up proceeded by a strong psyllid yellows like symptoms. C. Atlantic plants exposed 2.5 weeks to high-CLs psyllids. At the time of insecticide treatment the plants have a normal appearance, but 2 weeks later the symptoms develop, the plant collapses and dies 3 weeks later. Plants caged without psyllids are labeled as control, and the time points shown (2.5, 5 and 9 weeks) are in weeks after psyllid inoculation.