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EPG recordings of stylet activities of R. padi within seedling leaves of maize (susceptible Złota Karłowa cultivar). Horizontal axis—time (s); vertical axis—amplitude (mV). Np—non-probing; (C)—transition of the insect stylets through epidermis and mesophyll cells; (E1)—salivation into sieve elements; (E2)—phloem sap ingestion; (G)—xylem sap uptake.
