Frit fly damage to turfgrass
- S.-O. Dahlsson
Attacks of frit flies (Oscinella frit L.) have been observed during the years 1970 through 1972 in Scandinavia. Damage has appeared both in newly sown areas as well as in the older turf areas. Newly sown grass areas may be completely destroyed, while the established turf can withstand quite a severe attack. The most serious damages have been observed in Sweden, but attacks have also been noticed in Denmark, Finland, and Norway. In a trial with various insecticides it was found that diazinon [O,O-diethyl-O-(2-isopropyl-6-methyl-4-pyrimidinyl)-phosphorothioate] gave the best control. Applied at the rate of 1.0 liter/ha of active ingredient in high volume (500 liter) it was sufficient to prevent further damage. Second best was 1.0 kilo of dimethoate/ha [O,O-dimethyl-S-(N-methyl-carbamoylmethyl) phosphorodithioate].
In Scandinavia the frit fly is well known for its damage to spring oats (Avena sativa L.). Recent attacks in turf areas were unexpected. Since attacks outside Scandinavia have been reported to result in widespread damage and because of the great economic importance of the possible damage to turf, it is recommended that the public be made aware of the frit fly and its larva. Additional index words: Insects, Diazinon, Dimethoate, Fenitrothion, Methyoxychlor, Insecticides, Oscinella frit L.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
Copyright © 1974. . Copyright 1974 by the American Society of Agronomy, Inc. and the Crop Science Society of America, Inc., 5585 Guilford Rd., Madison, WI 53711 USA