Cocon ut mite Aceno (Eriophyes) guerreronis (Keifer) Of the family Eriophyi±e has been posing serious problems to the production OF coconut in Keralc from 1997 onwards. From an infestation which was confined to a few plantations in Ermkukrn District in 1997, the pest has now spread extensively in the State. The attack has caused drastic reduction in coconut production, pioying havoc to the coconut based economy Of Kerala. Of lofe the problem is widespread in many pans o/ Karnataka Ond the whole of south India. Coconut perianth mite is a microscopic, whitish organism, 0.20 - 0.25 mm long and cylindrical. The species and genus is distinguished by the presence Of c median pit just posterior to the prodorsa' shield.