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.

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

Field Trials of Sclerotinia sclerotiorum to Control Canada Thistle (Cirsium arvense)

Weed Science ◽  
1986 ◽  
Vol 34 (3) ◽  
pp. 377-380 ◽  
Author(s):  
Brenda S. Brosten ◽  
David C. Sands
Keyword(s):  
Biological Control ◽  
Root System ◽  
Sclerotinia Sclerotiorum ◽  
Biological Control Agent ◽  
Field Trials ◽  
Control Agent ◽  
Cirsium Arvense ◽  
Subsequent Reduction ◽  
Canada Thistle

An isolate of Sclerotinia sclerotiorum (Lib.) de Bary collected from a Canada thistle [Cirsium arvense (L.) Scop. # CIRAR] plant in Montana proved pathogenic on Canada thistle in field trials. In addition to attacking the thistle crown and causing wilting and death of the shoots, S. sclerotiorum also infected the root system. The high percentage of thistle shoot kill (20 to 80%) after treatment, and subsequent reduction in plant thistle density the following year, demonstrated the potential of S. sclerotiorum as a biological control agent for Canada thistle in Montana.

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