Translator Disclaimer
1 April 2002 Chemical Control of Penthaleus major (Acari: Prostigmata) in Hayfields in Iceland
Author Affiliations +
Abstract

The plant parasitic mite Penthaleus major (Dugès) occurs as a pest on perennial grasses in hayfields in Iceland, northern Norway, and southern Greenland. In these areas it appears as a summer phenomenon, contrary to more southern locations, where it appears as a pest on winter crops. Up to 500 individuals of P. major were collected per day in pitfall traps. Spring application of 44 ml/ha of permethrin and 5 ml of deltamethrin significantly reduced but did not eliminate the populations of P. major the following weeks. In addition to this immediate effect, spring application also decreased the mite populations in the fall and even the following spring. Additional effects might be obtained by earlier spring application. Despite a significant reduction in mite populations and reduction in visible plant damage, significant differences on dry matter yield were rarely registered. A side effect of application was a small but significant reduction in potassium-content of the yield, and the reduction in mite population was accompanied by a corresponding reduction in the number of spiders.

B. E. Gudleifsson, T. E. Hallas, S. Olafsson, and T. Sveinsson "Chemical Control of Penthaleus major (Acari: Prostigmata) in Hayfields in Iceland," Journal of Economic Entomology 95(2), 307-312, (1 April 2002). https://doi.org/10.1603/0022-0493-95.2.307
Received: 14 September 2000; Accepted: 1 October 2001; Published: 1 April 2002
JOURNAL ARTICLE
6 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top