Tetranychus urticae Koch, 1836 (Acari: Tetranychidae) infesting Humulus lupulus L. (Cannabaceae) in the State of Alagoas, Northeast Brazil

Hops (Humulus lupulus L.) (Cannabaceae) leaves showing symptoms of mite infestation were collected from an experimental field in União dos Palmares, Alagoas, Northeastern Brazil. In the laboratory, the mites were mounted in glass slides with Hoyer’s medium and identified as the two-spotted spider mite (Tetranychus urticae Koch, 1836) (Acari: Tetranychidae). The mite infestation was observed in the leaves of the hops varieties Cascade, Chinook, Comet, Nugget, Saaz, Triple Pearl, Triumph, and Zeus. Even after the hops harvesting, very high mite populations were observed in the cones (flowers) inside the drying room. Afterwards, T. urticae was also found infesting the hop varieties Hallertau Magnum, Triple Pearl, and Zeus in an ornamental hop plantation in Maceió, Alagoas. As far as the authors could investigate, this is the first report of T. urticae infesting H. lupulus in the State of Alagoas and even in the Northeast region of Brazil.