Powdery mildews of crops are caused by

Which of the following statement$(s)$ is/are correct about class Basidiomycetes?
$(i)$ They are commonly known as imperfect fungi because only the asexual or vegetative phases of these fungi are known.
$(ii)$ They grow in soil,on logs and tree stumps.
$(iii)$ They live inside plant bodies as parasites,e.g.,rusts and smuts.
$(iv)$ Some common members are Agaricus,Ustilago,and Puccinia.

In $Puccinia$,infection from barberry leaf to wheat plant is caused by:

Which of the following causes rust disease in wheat?

What are Club fungi?

Identify the organism shown in the given figure.