1. Anonymous 1953 . Administrative report , Director of Agriculture, Ceylon. 112 p .
2. Anonymous 1964 . Report of the crop protection division, annual report of the Coconut Research Institute of Sri Lanka . Ceylon Coconut Quarterly 15 : 50 – 57 .
3. Anonymous 1970 . Report of the crop protection division, annual report of the Coconut Research Institute of Sri Lanka . Ceylon Coconut Quarterly 21 : 56 – 59 .
4. Anonymous . 1987 . R eport of the crop protection division, annual report of the Coconut Research Institute of Sri Lanka . p 213 .