Multiple choice Which of the following pairs is incorrectly matched? Whisker mold - Penicillium ulaiense Mal secco - Phoma tracheiphila Blue mold - Penicillium italicum Green fruit mold - Mucor paronychia Rootlet rot - Pythium rostratum Reveal answer Fill a bubble to check yourself D Correct answer Explanation Penicillium digitatum causes Green fruit mold in citrus. Mucor fruit rot is caused by Mucor sp. (Mucor paronychia, Mucor racemosus).