When it comes to pesto there are going to be many different recipes which you will be able to look at and some of them do call for pecans. Once you go online and start looking around you will find that pecans are actually quite commonly used in pesto, though not all of the recipes you will come across will call for them.

In the end it will be up to you whether or not you want o use pecans in your pesto. These nuts certainly make for an interesting taste and more overall nutritional value because of all the different vitamins and minerals which they contain, so it might be a good idea to throw some in next time you make this dish.