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Mean values ± standard errors for phloem EPG parameters K to T of viruliferous and uninfected B. tabaci biotype B and Q whiteflies feeding on virus-free tomato plants (experiment 2). Parameter letters correspond to parameter letters in Table 4. White bars, uninfected biotype B feeding on virus-free plant; white striped bars, viruliferous biotype B; gray bars, uninfected biotype Q; gray striped bars, viruliferous biotype Q.
