MitesAcari) The presence of mites can be determined by rubbing a white cloth over a suspected area. If mites and eggs are present, brownish / orange streaks will be seen on the cloth.
Control usually entails purchasing an insecticide especially suited for dealing with mites.
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These are awful , they do a lot of damage before being noticed . Some do not make webs ,known as false spider mites , They are bad on Phals. but will attack other types of orchids . Safers will work but has to be used about every 3 days the reproductive cycle is short for them . Gin