Anandaraj, M.2014-07-102014-07-102007-02In: Proceedings, Silver JubileeSymposium on Arecanut Research and Development, CPCRI (RS), Vittal, 13-14 Dec.1982. Edited by K. Shama Bhat and C. P. Radhakrishnan Nair 83-85http://hdl.handle.net/123456789/3954The fruit rot or Koleroga caused by Phytophthora arecae occurs in epidemic proportions during south west monsoon season. The secondary spread of the pathogen is by sporangia produced abundantly on the infected fruits. To study the dispersal of sporangia. Hirst volumetric spore trap, bidirectional and multidirectional splash traps were used. The sporangia were liberated and spread mainly by rain splashes.enArticle