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Cheilosia corydon (Diptera: Syrphidae), a Candidate for the Biological Control of Musk Thistle in North America
In Italy, larvae of the syrphid fly, Cheilosia corydon (Harris) (=grossa Fallen), infest the flower buds, stems, and roots of Carduus nutans L. and C. pycnocephalus L. (Compositae), both seriousExpand
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Identification, pathogenicity and comparative virulence of Fusarium spp. associated with insect-damaged, diseased Centaurea spp. in Europe
Fusarium spp. isolated from insect-infested, diseased Centaurea diffusa and Centaurea maculosa in Europe were assessed for pathogenicity to North American plants of their respective original hosts:Expand
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Biology and host preference of Nephopteryx divisella (Lepidoptera: Pyralidae): Candidate agent for biological control of leafy spurge complex in North America
Euphorbia esula L. (Euphorbiaceae) is a complex of species that has become major weeds in rangelands and pastures in North America. The biology and host specificity of Nephopterix divisella DuponchelExpand
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A contribution to the biology ofBangasternus fausti [Col.: Curculionidae], a potential biological control agent of diffuse knapweed,Centaurea diffusa, and its effect on the host plant
The biology of the weevilBangasternus fausti (Reitter), the larvae of which live in the flowerheads ofCentaurea diffusa (De Lamarck) and some relatedCentaurea spp., was studied in the field and inExpand
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Palearctic Distribution and Host Plants of Ceutorhynchus trimaculatus and Trichosirocalus horridus (Coleoptera: Curculionidae)
Ceutorhynchus trimaculatus (F.) and Trichosirocalus (= Ceuthorhynchidius auctt. nec du Val) horridus (Panzer) are distributed in central and southern Europe and the Caucasus area of the USSR. C.Expand
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Molecular Identification of a New Member of the Clover Proliferation Phytoplasma Group (16SrVI) Associated with Centaurea Solstitialis Virescence in Italy
In the United States, yellow starthistle (Centaurea solstitialis) is an annual invasive weed with Mediterranean origins. Malformed plants displaying witches' broom, fasciations, abortion of buds andExpand
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Biology of Two Weevils, Ceutorhynchus trimaculatus and Trichosirocalus horridus, on Carduus spp. in Europe
Field studies were conducted at Rome, Italy, on Ceutorhynchus trimaculatus (F.) and Trichosirocalus horridus (Panzer), two candidate insects for the biological control of Carduus thistles in theExpand
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Effects of European and U.S. Strains of Fusarium spp. Pathogenic to Leafy Spurge on North American Grasses and Cultivated Species
Abstract Host-range tests were conducted in a greenhouse using 9 European and 11 U.S. strains of Fusarium spp. pathogenic to Euphorbia spp. Plants of 12 grass species native to the rangelands ofExpand
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Field and laboratory biology of the stem‐feeding beetle Thamnurgus euphorbiae (Küster) (Col., Scolytidae) in Italy, a potential biological control candidate of leafy spurge in the USA and Canada
Thamnurgus euphorbiae overwinters as adults in dry stems of Euphorbia characias until the end of March before exiting through circular holes cut with their mandibles. Females and males appeared inExpand
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Phytophagous Insects on Carduus macrocephalus in Italy
One hundred nine species of phytophagous insects from 6 orders and 33 families fed or reproduced on the thistle, Carduus macrocephalus Desfontaines, a biennial or winter annual in Italy. About ½ theExpand
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