PPIB and infection: Visual assessment, measurement of chlorophyll A and B, and real-time quantitative PCR analysis showed that treatment with dsRNAs targeting the <i>Alt-a1</i>, <i>TEF1a</i> and <i>β-Tub</i> genes significantly suppressed infection development, reducing the amount of pathogen DNA in plant tissues by 7 to 27 times depending on the dsRNA type.