Host Specificity of Aphthona abdominalis Duftschmid (Coleoptera: Chrysomelidae), a Biological Control Agent for Euphorbia esula L. (leafy spurge, Euphorbiaceae) in North America

1995 ◽  
Vol 5 (3) ◽  
pp. 353-360 ◽  
Author(s):  
L. Fornasari ◽  
P. Pecora
Keyword(s):  
Biological Control ◽  
North America ◽  
Host Specificity ◽  
Biological Control Agent ◽  
Leafy Spurge ◽  
Control Agent ◽  
Euphorbia Esula

AnAlternariasp. on Leafy Spurge (Euphorbia esula)

Weed Science ◽  
1983 ◽  
Vol 31 (1) ◽  
pp. 86-88 ◽  
Author(s):  
Joseph M. Krupinsky ◽  
Russell J. Lorenz
Keyword(s):  
Biological Control ◽  
Biological Control Agent ◽  
Field Studies ◽  
Leafy Spurge ◽  
Control Agent ◽  
Euphorbia Esula ◽  
Cultural Characteristics ◽  
Representative Strain

In 1979 and 1980, isolates ofAlternariawere obtained from diseased leafy spurge (Euphorbia esulaL.) plants. The pathogenicity of anAlternariasp. towards leafy spurge was demonstrated in glasshouse and limited field studies, and theAlternariais considered to be a potential biological - control agent for leafy spurge. The pathogenicity and cultural characteristics of the fungus suggest its classification asA. tenuissimaf. sp.euphorbiae,with isolate Krupinsky 80-3547ss4 (= E. G. Simmons 35-079) as a representative strain.

Host Specificity ofHypena opulenta: A Potential Biological Control Agent ofVincetoxicumin North America

2012 ◽  
Vol 41 (4) ◽  
pp. 841-848 ◽  
Author(s):  
Alex F. Hazlehurst ◽  
Aaron S. Weed ◽  
Lisa Tewksbury ◽  
Richard A. Casagrande
Keyword(s):  
Biological Control ◽  
North America ◽  
Host Specificity ◽  
Biological Control Agent ◽  
Control Agent

HOST SPECIFICITY AND SUITABILITY OF LEMA CYANELLA (COLEOPTERA: CHRYSOMELIDAE), A CANDIDATE FOR THE BIOLOGICAL CONTROL OF CANADA THISTLE (CIRSIUM ARVENSE)

1979 ◽  
Vol 111 (9) ◽  
pp. 1059-1068 ◽  
Author(s):  
D.P. Peschken ◽  
G.R. Johnson
Keyword(s):  
Biological Control ◽  
North America ◽  
Host Specificity ◽  
Biological Control Agent ◽  
Control Agent ◽  
Cirsium Arvense ◽  
Canada Thistle ◽  
Main Host ◽  
Disease Free

AbstractThe host specificity of Lema cyanella (L.) (Coleoptera: Chrysomelidae) and its suitability as a biological control agent were investigated. The females lay an average of 1564 eggs and development from egg to adult takes 17.6 days at 25°C during the day and 20°C during the night (average about 23°C). Feeding of adults and larvae is confined to Cirsium, Carduus, and Silybum species, and according to literature records, Cirsium arvense (L.) Scop. is the main host. No economic plants are attacked. A colony of field collected beetles imported from Germany was infected with a Nosema disease. It is recommended that disease free L. cyanella should be released against the weed C. arvense in North America.

Population Dynamics and Impacts of the Red-Headed Leafy Spurge Stem Borer on Leafy Spurge (Euphorbia esula)

2011 ◽  
Vol 4 (2) ◽  
pp. 183-188 ◽  
Author(s):  
Robert A. Progar ◽  
George Markin ◽  
Joseph Milan ◽  
Tom Barbouletos ◽  
Matthew J. Rinella
Keyword(s):  
Biological Control ◽  
Invasive Plant ◽  
Biological Control Agent ◽  
Stem Borer ◽  
Leafy Spurge ◽  
Control Agent ◽  
Euphorbia Esula ◽  
Western United States ◽  
Large Populations ◽  
And Control

AbstractWe evaluated the efficacy of the biological control agent, red-headed leafy spurge stem borer, against the nonnative invasive plant leafy spurge. Our three treatments were release of the biological control agent into uncaged plots, release of the biological control agent into plots caged to prevent agent escape, and control plots caged to prevent agent entry. These treatments were replicated three times at six sites in the western United States. We measured leafy spurge biomass for 1 or 2 yr following release. We also measured the percentage of leafy spurge stems showing evidence of red-headed leafy spurge stem borer oviposition for either 1 or 2 yr following agent release, depending on the site. Red-headed leafy spurge stem borer did not demonstrably reduce leafy spurge biomass in our study. Moreover, compared to the release year, evidence of red-headed leafy spurge stem borer oviposition declined with time, suggesting the agent population was diminishing. This suggests the agent is incapable of building large populations capable of controlling leafy spurge at the sites we studied. However, after being released, populations of biological control agents sometimes go through long lag phases and then begin rapid population increases, so we cannot completely dismiss the possibility that red-headed leafy spurge stem borer might become effective given more time.

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