I knew it she's Bat-Mare!

They were choked to death with pears by a disgruntle competitor right before Applejack's eyes…
From that day forward: Applejack swore she would have her revenge, and waged a never ending war against the insidious stems of the evil…
To this day, she still wears the hat her father wore on the night he died… As a symbol for her hatred towards pears and to help keep the sun out of her eyes while apple bucking.