scholarly journals Genetic Differentiation between Resistance Phenotypes in the Phytophagous Flea Beetle,Phyllotreta nemorum

2009 ◽  
Vol 9 (69) ◽  
pp. 1-8 ◽  
Author(s):  
Peter W. de Jong ◽  
Casper J. Breuker ◽  
Helene de Vos ◽  
Kim M.C.A Vermeer ◽  
Keiko Oku ◽  
...  
Keyword(s):  
Genetic Differentiation ◽  
Flea Beetle ◽  
Phyllotreta Nemorum

scholarly journals AFLP markers for the R-gene in the flea beetle, Phyllotreta nemorum, conferring resistance to defenses in Barbarea vulgaris

2005 ◽  
Vol 5 (1) ◽  
Author(s):  
Casper J. Breuker ◽  
Kathleen Victoir ◽  
Peter W. De Jong ◽  
Eddy van der Meijden ◽  
Paul M. Brakefield ◽  
...  
Keyword(s):  
Flea Beetle ◽  
Aflp Markers ◽  
R Gene ◽  
Barbarea Vulgaris ◽  
Phyllotreta Nemorum

scholarly journals Control of flea beetle, Phyllotreta nemorum L. (Coleoptera: Chrysomelidae) using locally available natural resources

1970 ◽  
Vol 1 (2) ◽  
pp. 111-114
Author(s):  
Indra P Subedi ◽  
Kamini Vaidya
Keyword(s):  
Mortality Rate ◽  
Flea Beetle ◽  
Acorus Calamus ◽  
Aqueous Extracts ◽  
Ageratum Conyzoides ◽  
Laboratory Results ◽  
Cow Urine ◽  
Buffalo Urine ◽  
Spilanthes Acmella ◽  
Phyllotreta Nemorum

Aqueous extracts of six different plants (Acorus calamus, Ageratum conyzoides, Azadirachta indica, Duranta repens, Spilanthes acmella and Urtica dioca) and diluted animal urine (buffalo and cow) were tested for mortality rate of flea beetle (Phyllotreta nemorum) in the laboratory. Results were compared with the effects of commercial neem product (neem azal) on flea beetle mortality. The host plant taken for the study was radish (Rhaphanus sativus). Three concentrations of aqueous plant extracts (1kg/5 l, 1kg/10 l and 1kg/20 l of water), three concentrations of animal urine (20%, 15% and 10%) and two concentrations of neem azal (0.1% and 0.01%) were tested in three replications. Observations on the beetle mortality were made at 24 hrs and thereafter on alternate days for a week (168 hrs). All tested concentrations of S. acmella, buffalo urine and cow urine were effective in flea beetle control; A. calamus, A. indica and U. dioca were significantly better in controlling flea beetle (P

scholarly journals Effects of starvation and mating status on the activity of the flea beetle, Phyllotreta nemorum (Coleoptera: Chrysomelidae)

2010 ◽  
Vol 107 (4) ◽  
pp. 549-551 ◽  
Author(s):  
Keiko OKU ◽  
Kim M.C.A. VERMEER ◽  
Patrick VERBAARSCHOT ◽  
Peter W. DE JONG
Keyword(s):  
Flea Beetle ◽  
Mating Status ◽  
Phyllotreta Nemorum

Isolation of polymorphic microsatellite loci from the flea beetle Phyllotreta nemorum L. (Coleoptera: Chrysomelidae)

2006 ◽  
Vol 7 (1) ◽  
pp. 60-62 ◽  
Author(s):  
P. VERBAARSCHOT ◽  
D. CALVO ◽  
G. D. ESSELINK ◽  
J. Ma. MOLINA ◽  
K. VRIELING ◽  
...  
Keyword(s):  
Microsatellite Loci ◽  
Flea Beetle ◽  
Polymorphic Microsatellite ◽  
Phyllotreta Nemorum

Pleiotropic effects associated with an allele enabling the flea beetle Phyllotreta nemorum to use Barbarea vulgaris as a host plant

2006 ◽  
Vol 21 (1) ◽  
pp. 13-26 ◽  
Author(s):  
Casper J. Breuker ◽  
Peter W. de Jong ◽  
Kathleen Victoir ◽  
Klaas Vrieling ◽  
Paul M. Brakefield
Keyword(s):  
Host Plant ◽  
Flea Beetle ◽  
Pleiotropic Effects ◽  
Barbarea Vulgaris ◽  
Phyllotreta Nemorum

Herbicides compromise biological control of ragwort

2002 ◽  
pp. 147-152
Author(s):  
K. Betteridge ◽  
D. Costall
Keyword(s):  
Biological Control ◽  
Pyrrolizidine Alkaloids ◽  
Animal Health ◽  
Flea Beetle ◽  
Dairy Farm ◽  
Senecio Jacobaea ◽  
Longitarsus Jacobaeae ◽  
High Ester ◽  
Low Levels

In spite of ragwort flea beetle (RFB) being present on a Dannevirke dairy farm, pastures were sprayed each winter to reduce ragwort density and limit the risk of ragwort poisoning of stock. The trial on this farm from June 1999 - October 2001, aimed to determine whether herbicide (H) impacted on RFB and how H and RFB each impacted on ragwort growth and persistence. RFBfree areas were created by spraying with insecticide (I). Effects of ragwort on animal health are also reported. High ester 2,4-D (H) boom-sprayed once only, in June 1999, killed most ragwort plants and reduced RFB larvae densities to low levels before the plants died. Once new ragwort established in treatment H, the plants became infested with RFB larvae. RFB larvae were suppressed by I resulting in ragwort density declining more slowly than in treatments where RFB were not suppressed. Insecticide treatments were stopped after 15 months and, at 24 months, ragwort could not be found within the trial area. Ragwort control was attributed to the cessation of herbicide spraying allowing the RFB population to reach a sufficient density to kill both small and large ragwort plants. Sub-clinical ragwort poisoning was found in livers of culled cows that had grazed on ragwort-dense pastures. Keywords: animal health, biological control, Longitarsus jacobaeae, pyrrolizidine alkaloids, ragwort, ragwort flea beetle, Senecio jacobaea

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