Rona Luke and Kipiyona Belas, each from two warring tribes, said the male infanticide reduces the cyclical pay back violence infamous in Highlands tribal fights.
If women stopped producing males their tribe's stock would go down and this would force the men to end their fight, they said choking back tears.
"All the women folk agreed to have all babies born killed because they have had enough of men engaging in tribal conflicts and bringing misery to them," Luke said.
The women could not give a figure on how many male babies had been killed in the cull.
Belas said getting food was hard as husbands kept fighting and mothers and children were left to fend for themselves.
The Salvation Army is working with various tribes to bring peace to the warring groups, one particular fight continues after starting in 1986 over sorcery claims.
The Salvation Army told AAP women were so fed-up with the violence they were taking the drastic steps.
"This is what we were told during the peace conference," he said.
"This situation shows the extreme frustration the women have with the men in these areas."