Pseudomonocystis sp., an Eugregarine Protozoan Pathogen of the Coconut Root Grub, Leucopholis coneophora
Abstract:Populations of the coconut root grub , Leucopholis coneophora, were infected by an eugre garine protozoan pathogen , Pseudomonocystis sp . The pathogen infected 22.7% third - instar L. coneophora larvae in the field . The infected larvae produced 1 - 84 (average 37 . 11) milky - white , membranous , elliptical cysts measuring 2 . 64 1 . 24 mm . Each cyst contained about 3 . 80 105 mucilaginous spores . The spores were elliptical with two tubular polar caps , thick - walled , ornamented with irregular ridges and furrows , and measured 26 . 04 13 . 61 mum . The LD and LT for oral inoculation of spores into third - instar larvae were 9 . 86 104 50 50 spores / larva and 27 . 62 days respectively . Ingestion of spores with or without food and connibalism of infected larvae were the modes of transmission of the pathogen .
Document Type: Research Article
Publication date: September 1, 1997