Step 1: Understanding the Question:
The question asks about the advice given by the imp to the peasant.
Step 2: Locating the Information in the Passage:
The passage details two key pieces of advice from the imp.
First: "On his advice the peasant produced good crop."
Second: "The imp then instigated him to prepare wine from the surplus corn." (Instigated here means urged or advised with a negative intention).
Step 3: Final Answer:
The imp's advice was two-fold. He first gave productive advice to grow a good crop, leading to surplus. He then gave corrupting advice to turn that surplus into wine.