Bogo, A. 2003 New group of oligosaccharides excreted in honeydew from scale insects Stigmacoccus sp. and Coccus hesperidium L.. Ciencia Rural 33(4): 593-599.

Notes: The honeydew from the scale insects Stigmacoccus sp. and Coccus hesperidum were analysed using paper chromatography, FAB-MS and GC-MS. Paper chromatography showed the presence of tri-, tetra- and pentasaccharides. The molecular masses of permethylated tri-, tetra- and pentasaccharides confirmed that they were all hexose polymers with molecular ions of 658, 862 and 1067 m/z, respectively, in FAB-MS. The oligosaccharides in Stigmacoccus sp. honeydew appeared identical to the analogous components of C. hesperidum honeydew. A systematic increase in the proportion of 1,4-glucopyranose to 2-fructofuranose and 1-glucopyranose with each unitary increase in the number of monosaccharides was observed. Linkage analysis by GC-MS fragment for both Stigmacoccus sp. and C. hesperidum oligosaccharides showed fructofuranose linked in the 2 position, glucopyranose linked in both 1 and 4 positions and glucopyranose linked in the 1 position. The structures and common names, such as stigmatriose, stigmatetraose and stigmapentose, were proposed for the oligosaccharides (initially found in Stigmacoccus sp. honeydew).