Ofcourse the settlers don't want the palestinian farmers escorted. They want to be free to do with the farmers what they see fit. There are always problems during harvest time and with outsiders out, it will be very easy for the settlers and the IDF to either scare the farmers off and blame it on them or just simply keep them out too!
UN aid chief says no warring parties observed Yemen truce (Reuters)
from the article: IDF aims to keep out 'escorts' of Palestinian farmers during harvest