Ceutorhynchus obstrictus (Marsham), cabbage seedpod weevil (Coleoptera: Curculionidae).

2013 ◽  
pp. 119-129 ◽  
Author(s):  
T. Haye ◽  
P. G. Mason ◽  
L. M. Dosdall ◽  
D. R. Gillespie ◽  
G. A. P. Gibson ◽  
...  
Keyword(s):  
Ceutorhynchus Obstrictus ◽  
Cabbage Seedpod Weevil

The species of Chalcidoidea (Hymenoptera) introduced to North America for biological control of the cabbage seedpod weevil, and the first recovery of Stenomalina gracilis (Chalcidoidea: Pteromalidae)

2006 ◽  
Vol 138 (3) ◽  
pp. 285-291 ◽  
Author(s):  
Gary A.P. Gibson ◽  
David R. Gillespie ◽  
Lloyd Dosdall
Keyword(s):  
Biological Control ◽  
British Columbia ◽  
North America ◽  
Classical Biological Control ◽  
Ceutorhynchus Obstrictus ◽  
Pteromalus Puparum ◽  
Cabbage Seedpod Weevil

AbstractThe species of Pteromalidae (Chalcidoidea) introduced to British Columbia, Canada, from Europe in 1949 as Trichomalus fasciatus (Thomson, 1878), Xenocrepis pura Mayr, 1904, and Habrocytus sp. for classical biological control of Ceutorhynchus obstrictus (Marsham, 1802) (Coleoptera: Curculionidae) are shown to be misidentifications of Trichomalus perfectus (Walker, 1835), Mesopolobus morys (Walker, 1848), and Stenomalina gracilis (Walker, 1834), respectively. Species reared subsequently from seedpods of Brassica spp. (Brassicaceae) in British Columbia and reported in the literature under the first three names are shown to be misidentifications of, respectively, Trichomalus lucidus (Walker, 1835), Mesopolobus moryoides Gibson, 2005, and one or both of Pteromalus puparum (L., 1758) and T. lucidus. There is no evidence that either T. perfectus or M. morys established in North America, but S. gracilis is newly recorded from southern British Columbia based on specimens reared from Brassicaceae seedpods in 2004 and 2005.

scholarly journals Larval phenologies and parasitoids of two seed-feeding weevils associated with hoary cress and shepherd's purse (Brassicaceae) in Europe

2011 ◽  
Vol 143 (4) ◽  
pp. 399-410 ◽  
Author(s):  
Franck J. Muller ◽  
Lloyd M. Dosdall ◽  
Peter G. Mason ◽  
Ulrich Kuhlmann
Keyword(s):  
Biological Control ◽  
Brassica Napus ◽  
North America ◽  
Host Specificity ◽  
Brassica Rapa ◽  
Ceutorhynchus Obstrictus ◽  
Hoary Cress ◽  
Cabbage Seedpod Weevil ◽  
Alien Pest ◽  
Host Associations

AbstractIn Europe, Ceutorhynchus turbatus Schultze and Ceutorhynchus typhae (Herbst) (Coleoptera: Curculionidae) feed on seeds from hoary cress and shepherd's purse (Cardaria draba (L.) Desv. and Capsella bursa-pastoris (L.) Medik.); both plants are invasive in North America. In North America, C. turbatus is a candidate for biological control of hoary cress, C. typhae is adventive, and both are sympatric with cabbage seedpod weevil (Ceutorhynchus obstrictus (Marsham)), an invasive alien pest of canola (Brassica napus L. and Brassica rapa L., Brassicaceae). We investigated host associations among C. turbatus, C. typhae, and their parasitoids in Europe. Of particular interest was host specificity of Trichomalus perfectus (Walker) and Mesopolobus morys (Walker) (Hymenoptera: Pteromalidae), candidates for biological control of C. obstrictus in North America. We found no evidence that T. perfectus attacks C. turbatus or C. typhae; however, M. morys was the most common parasitoid associated with C. turbatus.

scholarly journals A review of the species of Mesopolobus (Chalcidoidea: Pteromalidae) associated with Ceutorhynchus (Coleoptera: Curculionidae) host-species of European origin

2007 ◽  
Vol 97 (4) ◽  
pp. 387-397 ◽  
Author(s):  
H. Baur ◽  
F.J. Muller ◽  
G.A.P. Gibson ◽  
P.G. Mason ◽  
U. Kuhlmann
Keyword(s):  
Biological Control ◽  
North America ◽  
Classical Biological Control ◽  
Junior Synonym ◽  
European Origin ◽  
Ceutorhynchus Obstrictus ◽  
Hoary Cress ◽  
Cabbage Seedpod Weevil ◽  
Lepidium Draba ◽  
First Time

AbstractFour species of Mesopolobus Westwood were reared as parasitoids of Ceutorhynchinae hosts in Europe during surveys in 2000–2004. An illustrated key is given to differentiate the four species, M. gemellus Baur & Muller sp. n., M. incultus (Walker), M. morys (Walker) and M. trasullus (Walker), plus M. moryoides Gibson, a parasitoid of the cabbage seedpod weevil, Ceutorhynchus obstrictus (Marsham), in North America. Pteromalus clavicornis Walker is recognized as a junior synonym of M. incultussyn. n., and Pteromalus berecynthos Walker (also a junior synonym of M. incultus) is considered a correct original spelling. For Disema pallipes Förster (a junior synonym of Mesopolobus morys), a lectotype is designated. Mesopolobus morys is for the first time accurately associated with the seed weevil Ceutorhynchus turbatus (Schultze), a potential agent for classical biological control, of hoary cress, Lepidium draba L. (Brassicaceae), in North America. Mesopolobus gemellus is associated with another seed weevil, Ceutorhynchus typhae (=C. floralis) (Herbst), in pods of shepherd's purse, Capsella bursa-pastoris (L.) Medik. (Brassicaceae). Implications of the host–parasitoid associations are discussed relative to the introduction of species to North America for classical biological control of the cabbage seedpod weevil.

Antixenosis and antibiosis resistance to Ceutorhynchus obstrictus in novel germplasm derived from Sinapis alba x Brassica napus

2010 ◽  
Vol 142 (3) ◽  
pp. 212-221 ◽  
Author(s):  
James A. Tansey ◽  
Lloyd M. Dosdall ◽  
Andrew Keddie ◽  
Ron S. Fletcher ◽  
Laima S. Kott
Keyword(s):  
Brassica Napus ◽  
Field Trials ◽  
Sinapis Alba ◽  
Chemical Analyses ◽  
Resistant Line ◽  
Thlaspi Arvense ◽  
Ceutorhynchus Obstrictus ◽  
Resistant Lines ◽  
Cabbage Seedpod Weevil ◽  
Antibiosis Resistance

AbstractIntrogression of cabbage seedpod weevil, Ceutorhynchus obstrictus (Marsham) (Coleoptera: Curculionidae), resistance from Sinapis alba L. to susceptible Brassica napus L. (Brassicaceae) has produced genetic lines resistant to the weevil in replicated field trials. In the current study, weevil feeding and oviposition on S. alba and on resistant novel lines developed by crossing S. alba × B. napus were less frequent than on susceptible germplasm. Development times were greater and biomass was less when larvae were reared on resistant lines or S. alba. Oocyte development was faster in post-diapause springtime adult female weevils caged on susceptible plants than in those on a resistant line, S. alba, or an early-season food host, Thlaspi arvense L (Brassicaceae). Our results suggest that antixenosis resistance and antibiosis resistance are expressed by resistant lines. These results and previous chemical analyses of these lines also suggest that resistance is potentially influenced by attractive and (or) feeding-stimulant effects of 2-phenylethyl glucosinolate and antifeedant or toxic effects of 1-methoxy-3-indolylmethyl glucosinolate.

Resistance of canola-quality cultivars of yellow mustard, Sinapis alba L., to the cabbage seedpod weevil, Ceutorhynchus obstrictus (Marsham)

2004 ◽  
Vol 84 (1) ◽  
pp. 397-399 ◽  
Author(s):  
J. P. McCaffrey ◽  
B. L. Harmon ◽  
J. Brown ◽  
J. B. Davis
Keyword(s):  
Key Words ◽  
Plant Resistance ◽  
Sinapis Alba ◽  
Ceutorhynchus Assimilis ◽  
Yellow Mustard ◽  
Sinapis Alba L ◽  
Ceutorhynchus Obstrictus ◽  
Cabbage Seedpod Weevil ◽  
Canola Quality ◽  
Resistance Traits

Oilseed Bassica is susceptible to attack by the cabbage seedpod weevil while commercial yellow mustard, Sinapis alba L., is resistant. The objective of this study was to determine if canola-quality S. alba would maintain its resistance traits. In laboratory choice and nochoice tests we found the number of eggs laid by the weevil to be low or non-existent in all S. alba genotypes. Key words: Ceutorhynchus obstrictus, Ceutorhynchus assimilis, Sinapis alba, plant resistance

Cabbage seedpod weevil resistance in canola (Brassica Napus L.) yellow mustard (Sinapis alba L.) and canola × yellow mustard hybrids

2008 ◽  
Vol 88 (1) ◽  
pp. 239-245 ◽  
Author(s):  
Daniel W. Ross ◽  
Jack Brown ◽  
Joseph P. McCaffrey ◽  
Bradley L. Harmon ◽  
Jim B. Davis
Keyword(s):  
Brassica Napus ◽  
Negative Relationship ◽  
Sinapis Alba ◽  
Egg Laying ◽  
Seed Meal ◽  
Glucosinolate Content ◽  
Yellow Mustard ◽  
Ceutorhynchus Obstrictus ◽  
Choice Tests ◽  
Cabbage Seedpod Weevil

Canola, yellow mustard and yellow mustard × canola hybrids were screened for resistance to Ceutorhynchus obstrictus (Marsham) in a series of greenhouse and laboratory choice tests. Tests were conducted using small and large cages designed to hold Brassica pods or whole plants, respectively, with ovipositing female C. obstrictus. Pods were examined for feeding punctures, eggs laid and exit holes that resulted from emerging larvae. All yellow mustard cultivars examined were highly resistant to C. obstrictus feeding and egg laying. In addition, hybrid lines were found with significantly reduced feeding punctures, oviposition, and exit holes compared with canola. A negative relationship was observed between total glucosinolate content of seed and C. obstrictus resistance; however, in both detached pod and whole plant choice tests, hybrids were identified with high seed glucosinolate content that were more susceptible than the most susceptible canola. The relatively poor association between total seed meal glucosinolate content and C. obstrictus resistance is highly important and plant breeders should be able to develop canola-quality oil and seed meal characteristics with improved C. obstrictus resistance using yellow mustard × canola hybrids. The effect of specific glucosinolate types on C. obstrictus resistance may be more complex than previously thought, and further research will be needed to better understand the relationship between specific glucosinolate types and resistance to C. obstrictus. Key words: Brassica napus, Sinapis alba, Ceutorhynchus obstrictus, cabbage seedpod weevil, insect resistance, glucosinolate

Microctonus melanopus (Ruthe) (Hymenoptera: Braconidae), a Parasitoid of Adult Cabbage Seedpod Weevil (Coleoptera: Curculionidae): Distribution in Southern Alberta and Female Diagnosis

2004 ◽  
Vol 39 (3) ◽  
pp. 350-361 ◽  
Author(s):  
Andrew S. Fox ◽  
Scott R. Shaw ◽  
Lloyd M. Dosdall ◽  
Byron Lee
Keyword(s):  
British Columbia ◽  
North America ◽  
Oilseed Crop ◽  
Brassica Napus L ◽  
Canadian Prairies ◽  
Ceutorhynchus Obstrictus ◽  
Southern Alberta ◽  
Cabbage Seedpod Weevil ◽  
Substantial Control ◽  
North America North

Microctonus melanopus (Ruthe) were reared and dissected from adult cabbage seedpod weevil, Ceutorhynchus obstrictus (Marsham), collected in southern Alberta in 2000 and 2001, and M. melanopus females were collected near Creston, British Columbia in 2001. These collections represent the first records for this European species in Canada. Previously published records of M. melanopus in North America are from the northwestern United States. A first diagnosis for adult female M. melanopus is provided that places M. melanopus in Loan's (1969) key for Microctonus species of North America, north of Mexico. Scanning electron photomicrographs of female morphology are provided to illustrate important diagnostic characters: the mesonotal sculpture with a distinct median longitudinal carina posteriorly, and the sculpture of metasomal tergite 1 with costae distinctly converging posteriorly. It is probable that M. melanopus has long been established in the southern interior of British Columbia because its host, C. obstrictus, has occurred there for many years. The occurrence of M. melanopus in southern Alberta is likely more recent, as its host only recently dispersed to that region. Rates of parasitism of C. obstrictus by M. melanopus, with one exception, were low in southern Alberta (<10%), and only one parasitized weevil was found on spring-seeded Brassica napus L., the primary brassicaceous oilseed crop associated with the weevil on the Canadian prairies. We hypothesize that M. melanopus will not provide substantial control of C. obstrictus in the mixed grassland ecoregion of its new range.

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