Simple method for discriminating six common species of red Tetranychus spider mites (Acari: Tetranychidae) in Japan.

Six species of spider mites common in Japan, show a close similarity in both color (red) and morphology. It is difficult to separate these species even with experience. To solve this problem, we analyzed their allozyme patterns of esterases, and tried to find morphological characters that may distinguish the species. Esterase patterns showed species-specific characteristics. Morphological characters of living adult females also provide a key to discriminate the six species.