Figure 4. The effects of retention time on the proportion of RT-PCR positive B. tabaci MED.

Whiteflies having fed on CCYV-infected cucumber plants for 3 days were transferred to cotton plants (non-host plants for CCYV but host plant for whiteflies). Twenty-four whiteflies were collected at time intervals of 1, 3, 6, 9, 12 and 15 d, respectively, for real-time RT-PCR tests. Data shown are mean ± SE. Three replicates were used for each collection.