Italics for words-as-words 

In plant articles, like Pumpkin, it is normal to use quotation marks rather than italics as per MOS:WORDSASWORDS: "When italics could cause confusion, quotation marks instead may be used to distinguish words as words." This is because italics mark scientific names. I don't think the change you made at Pumpkin matters, but elsewhere it might create confusion for readers not familiar with the scientific names involved. As an example, "citrus" is used both as a common name and as the genus name Cistrus. It would be confusing to use italics to mark "citrus" as reference rather than a use.