Figure 2. The effects of B. tabaci MED number on the proportion of CCYV-infected plants.

After feeding on CCYV-infected cucumber plants for 3 days, groups of 5, 15 and 30 whiteflies were respectively placed on non-infected cucumber leaves (3–4 leaf stage) with clip cages for 24 h. Twenty four plants were used for each whitefly group with 3 replicates, and plants were analyzed by RT-PCR after 30 days. Data shown are mean ± SE.