Meyer was instrumental in the development of acarology in Southern Africa, leading to better international understanding of some of the most economically and agriculturally important agricultural pests that belong to the
Spider mite family, Tetranychidae and the flat mites
Tenuipalpidae. She described more than 700 new
species and 25 new
genera of mites, including the genera
Capedulia,
Coleacarus and
Krugeria. In 1959 Meyer established the National Collection of
Acari, which is now one of the largest mite collections in the Southern Hemisphere with more than 120,000 specimens, representing more than 47
families, 200 genera, and 1200 species, more than half of which had been collected during her time at the PPRI. Meyer developed several techniques for the collection of mites and made important contributions to their control on various plants, including citrus, cotton, deciduous fruit, grapes, berries, vegetables, tobacco and other field crops, flowers and ornamental plants. She was involved in the dissemination of information on the control of mites and was actively involved in the registration of new
miticides and in advising chemical companies on their spraying trials as well as evaluating the results thereof. Meyer made special efforts to promote the biological control of mites using spiders, insects and predatory mites. These predatory mites were collected from several
Acacia species. Meyer collaborated with researchers from Costa Rica, Israel and Portugal and helped countries across the world with identification. She also advised on economically important mites on different crops to countries in southern Africa including Angola, Malawi and Zimbabwe. == Recognition ==