Powdery Mildews are described as which of the following?

Powdery Mildews are described as which of the following?

• A. A milky white amber droplet of bacterial ooze that may exude from plant parts. Cambial tissue is killed in the region of the canker and will be brown to black.
• B. Once applied as a systemic, these chemicals frontal fungi that have already entered the plant.
• C. Caused by several different genera of fungi and commonly infects dogwoods, crabapples, roses and lilac.
• D. A disease caused by rust on dogwoods.

Answer: (C)

Powdery mildews are fungal diseases caused by several different genera of fungi, and they commonly infect a wide range of ornamental plants including dogwoods, crabapples, roses, and lilac. The hallmark is a white, powdery coating on leaves, stems, or flowers, often visible on the upper leaf surface and sometimes on buds or fruit. This grouping of pathogens can affect many hosts, which is why the same disease name appears on multiple plant types. The other descriptions don’t fit because they describe something unrelated: the first option mentions bacterial ooze and cambial damage, which is characteristic of bacterial canker rather than powdery mildews; the second talks about systemic fungicides acting on fungi that have entered the plant, which is a treatment concept, not the nature of the disease itself; and the fourth option attributes the issue to rust on dogwoods, which is a different type of fungal disease with distinct symptoms and spore forms.

Powdery mildews are fungal diseases caused by several different genera of fungi, and they commonly infect a wide range of ornamental plants including dogwoods, crabapples, roses, and lilac. The hallmark is a white, powdery coating on leaves, stems, or flowers, often visible on the upper leaf surface and sometimes on buds or fruit. This grouping of pathogens can affect many hosts, which is why the same disease name appears on multiple plant types.

The other descriptions don’t fit because they describe something unrelated: the first option mentions bacterial ooze and cambial damage, which is characteristic of bacterial canker rather than powdery mildews; the second talks about systemic fungicides acting on fungi that have entered the plant, which is a treatment concept, not the nature of the disease itself; and the fourth option attributes the issue to rust on dogwoods, which is a different type of fungal disease with distinct symptoms and spore forms.