Thumba logulitsira papepala lakhala chikwama chokomera eco kwazaka zambiri. Kalekale anthu amagwiritsa ntchito nsalu ndi chikwama cha jute kunyamula katundu. Pazinthu zazing'onozi, ogulitsa akhoza kugwiritsa ntchito chikwama chopangira mapepala, monga malo ogulitsira maswiti, ogulitsa, ophika mkate, ndi zina zambiri.