. Cooperative economic insect report. Beneficial insects; Insect pests. - 229 - INSECTS NOT KNOWN TO OCCUR IN THE UNITED STATES GREEN OAK TORTRIX* (Tortrix viridana L.) Economic Importance: This defoliator is Europe, o serious pest of oak forests in ften requiring widespread control measures. It has been called the most injurious lepidopterous pest of oak in the United Kingdoiu and is possibly the worst forestry- pest in southern Europe due to the importance of its attack on the cork oak forests and the hog-feed forests of the Iberian Peninsula. Complete defoliation may occur in severe outbrea
. Cooperative economic insect report. Beneficial insects; Insect pests. - 229 - INSECTS NOT KNOWN TO OCCUR IN THE UNITED STATES GREEN OAK TORTRIX* (Tortrix viridana L.) Economic Importance: This defoliator is Europe, o serious pest of oak forests in ften requiring widespread control measures. It has been called the most injurious lepidopterous pest of oak in the United Kingdoiu and is possibly the worst forestry- pest in southern Europe due to the importance of its attack on the cork oak forests and the hog-feed forests of the Iberian Peninsula. Complete defoliation may occur in severe outbreaks. Repeated defoliations cause die-back and weaken the trees, predisposing them to attacks by fungi and other y destructive agents. Distribution: Reported to occur throughout Europe. Also Turkey and Morocco. Hosts: Principal host plants are species of oak. May also attack beech, linden, maple, and other Defoliated Oaks with Undamaged Beech Undergrowth. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Animal and Plant Health Service. Plant Protection and Quarantine Programs; United States. Bureau of Entomology and Plant Quarantine; United States. Plant Pest Control Division. Hyattsville, MD. [etc. ] Plant Protection and Quarantine Programs Animal and Plant Health Service
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Keywords: ., bookcentury1900, booksubjectbeneficialinsects, booksubjectinsect
