Dr Mumba said unity in any organization was important because it was building the strong foundation.
He said at Mkaika in Katete on Saturday that the party members must not embroiled themselves into squabbles but to promote unity of purpose.
He also said the former ruling party would put in its best in order to reclaim their former parliament seats in the September 11th by-elections.
Dr Mumba said the people of all provinces were still appreciating the role which MMD played when it was in power.
He said the MMD party played a big role agriculture in the country saying it was sign that the party was still formidable in areas where parliamentary by-elections were taking place.
“The MMD is still strong in the country more especially in areas where parliamentary by-elections are taking place and we shall put the best to reclaim our parliamentary seats,” he said.
Dr Mumba said disfranchising the people in creating the parliamentary by-elections were not necessary.
He said MMD was ready to fight the seats and get them back in the parliamentary by- elections.
“We managed to get our seats in Chipata Central and Mkaika and now we are getting the seats Kasenengwa and Vubwi after the polls,”he said.
Dr Mumba also advised his fellow political leaders to always break political barriers during traditional ceremonies such as Kulamba of the Chewa people.
Campaigns for parliamentary by-elections are taking place in Solwezi Central,Zambezi West,Mkushi South,Vubwi and Kasenengwa.