By Dr R Sudarshan S ome 20 feet high above the ground on the Soursop plant on the farm, a football-sized nest has come up overnight. And thousands of weaver ants are still busy bending the leaves and enlarging their tree house. Weaver ants are almost mythical. Hundreds of them stand in a line and bend the leaves together, just like the slaves in Cecil B Demille's epic films moved massive stones to build the pyramid. Then they bring in their own larvae, shake them back and forth and squeeze out their silk saliva to glue the leaves into globule nests. They feed on aphids and other harmful insects. Such friendly creatures help natural farming. But they can also bite if we intrude and disturb their peaceful life in their farmhouse. Farmer's House, Silverfish Books, Kutz Bowl and the Farmer's Market, # 1A, 13th Cross, Kalidasa Road, VV Mohalla, Mysore.