The lifecycle of B. tabaci comprises seven developmental stages (Fig 3). The eggs are deposited on the abaxial leaf side, often in a semi-circular pattern during feeding (McAuslane
2000), but solitary eggs are also found. After hatching, the mobile first-instar nymph will search for a suitable feeding site, where it will ingest phloem sap. Three moulting events take place, in which the immobile nymphs increase in size. After moulting, the fourth-instar nymph will turn red-eyed.
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