INSECT INJURY TO LINSEED IN SOUTH-EAST ENGLAND

Citation
Aw. Ferguson et al., INSECT INJURY TO LINSEED IN SOUTH-EAST ENGLAND, Crop protection, 16(7), 1997, pp. 643-652
Citations number
41
Categorie Soggetti
Agriculture
Journal title
ISSN journal
02612194
Volume
16
Issue
7
Year of publication
1997
Pages
643 - 652
Database
ISI
SICI code
0261-2194(1997)16:7<643:IITLIS>2.0.ZU;2-L
Abstract
Pests were monitored on linseed crops in Hertfordshire, Cambridgeshire and Bedfordshire from 1987 to 1990. Adult flea beetles (Aphthona euph orbiae and Longitarsus parvulus) caused severe injury to seedlings; th eir numbers have markedly increased since 1990 and they are now import ant pests of linseed in the UK. Two generations of Thrips angusticeps bred on linseed, causing damage to growing points and flower buds and approximately 14% yield loss to a crop in Hampshire. Mirids, mostly Ca locoris norvegicus and Lygus rugulipennis, caused injury similar to th at caused by thrips. Mirids were more abundant close to field boundari es with woody plants, whereas thrips were fewer at these boundaries an d rather evenly distributed within the rest of the field. Few other in sects and no aphid colonies were found. Experiments with insecticide t reatments provided evidence of compensation for insect injury by addit ional flower production. (C) 1997 Elsevier Science Ltd.