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نویسنده
چکیده
Lygus lineolaris (Palisot de Beauvois), Lygus hesperus (Knight) and Lygus rugulipennis (Poppius) can cause multiple-leaders to form on conifer seedlings. Injury due to Lygus bugs has increased during the last two decades to the point where these bugs are now considered the worst insect pest at many conifer nurseries. At several nurseries, Lygus bugs have injured 30% or more of the seedlings. Substantial injury has occurred in the United States, Canada, Europe, and the United Kingdom. Similar injury in other regions of the world (i.e. New Zealand) might also be attributed to Lygus or related species. It is hypothesized that the rise in injury results from a cessation in the use of mineral spirits (also known as white spirits or mineral oils) that were frequently applied to control weeds in seedbeds.
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