Abstract Background Two colour forms of the two-spotted spider mite (Tetranychus urticae Koch) coexist in China: a red (carmine) form. which is considered to be native and a green form which is considered to be invasive. The population genetic diversity and population genetic structure of this organism were unclear in China. and there is a controversy over whether they constitute dist... https://fitnessgravesyardes.shop/product-category/step-up-pulley/