Fig. 2.

Four-FPA can be absorbed by rice plants and is immediately converted into 4-FP. (Top) Mean levels (+SE, n = 5) of 4-FPA (A) and 4-FP (B) in plant leaf sheaths at 0, 1, 4, and 7 d after growing in nutrient solution containing 5 mg L⁻¹ 4-FPA (4-FPA-R) or 5 mg L⁻¹ 4-FPA and simultaneously infested with 20 third instar WBPH (4-FPA-R+NP). (Middle) Mass spectra of 4-FPA (Left) and 4-FP (Right) standards. (Lower) Mass spectra of 4-FPA (Left) and 4-FP (Right) in samples.