HYPOGASTRURA SUCCINEA (COLLEMBOLA: HYPOGASTRURIDAE) DISPERSED BY ADULTS OF THE CABBAGE MAGGOT, DELIA RADICUM (DIPTERA: ANTHOMYIIDAE), INFECTED WITH THE PARASITIC FUNGUS STRONGWELLSEA CASTRANS (ZYGOMYCETES: ENTOMOPHTHORACEAE)

1985 ◽  
Vol 117 (8) ◽  
pp. 1063-1064 ◽  
Author(s):  
G.C.D. Griffiths
Keyword(s):  
Delia Radicum ◽  
Parasitic Fungus ◽  
Strongwellsea Castrans ◽  
Cabbage Maggot ◽  
Inadequate Nutrition ◽  
Northern Alberta

In the course of investigations of the cabbage maggot, Delia radicum (L.) (= brassicae Wiedemann, brassicae Bouché), a pest of canola (rapeseed) in northern Alberta, an epidemic of the parasitic fungus Strongwellsea castrans Batko and Weiser (see Humber 1976) was documented during July 1983. Infected flies (mostly females) can be recognized by the presence of one or more cavities in the abdominal membrane, into which the fungus discharges its spores (conidia). The flies continue to feed (as vital organs are not attacked), but their eggs fail to mature, apparently because of inadequate nutrition. The presence of this fungus as a pathogen of the cabbage maggot in Canada is well known (Nair and McEwen 1973).

scholarly journals Microbial Control of Cabbage Maggot-Preliminary Screenings of Fungal Isolates, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 413-413 ◽  
Author(s):  
Richard Meadow ◽  
John D. Vandenberg ◽  
Anthony M. Shelton ◽  
D. Wesley Watson
Keyword(s):  
New York ◽  
New York State ◽  
Microbial Control ◽  
Delia Radicum ◽  
Cornell University ◽  
Southern Corn Rootworm ◽  
Centrifuge Tube ◽  
Lepidoptera Pyralidae ◽  
Agricultural Experiment ◽  
Cabbage Maggot

Abstract Adult CM were exposed to dry conidia of isolates of Beauvaria bassiana (Bb), Metarhizium anisopilae (Ma) or Paeciomyces fumosoroseus (Pf). Two B. bassiana isolates were from Cornell University (P89, L90) isolated from Musca domestica (Diptera: Muscidae), one was from Mycoteh Corp., Butte, MT (Myc 726) originally isolated from southern corn rootworm, Diabrotica undecimpuntata (Coleoptera: Chrysomelidae), re-isolated from a grasshopper, Melanoplus sp. (Orthoptera:Acrididae), and then re-isolated from silverleaf whitefly, Bemesia argentiflora (Homoptera: Aleyrodidae). The other isolates were from the USDA-ARS Collection of Entomophagous Fungal Cultures. One B. bassiana isolate, 4012, was isolated from Delia radicum (Diptera: Anthomyiidae). The P. fumosoroseus isolates were number 1626 from M. autumnalis (Diptera: Muscidae), 1644, 1645, 1867 and 1868 from M. domestica, 1646 from Calliphora spp. (Diptera: Calliphoridae), and 887 from unidentified Diptera. The M. anisopilae isolates were 2521 from Deois spp. (Homoptera: Cercopidae), 3540 from Gelleria mellonella (Lepidoptera: Pyralidae) and 4862 and 4865 from soil. Flies from rearings at the New York State Agricultural Experiment Station, Geneva, NY, were exposed to the fungi by placing 5 flies in a centrifuge tube containing conidia scraped directly from culture plates. The flies were then released into small screened plastic cages, which were placed in chambers with constant temperature of 21° C and L:D 15: 9. There were 3 replicates. Mortality was assessed after 48, 120 and 160h. Dead flies were placed in petri dishes with moistened filter paper to assess infection.

Undersowing rutabaga with white clover: impact on Delia radicum (Diptera: Anthomyiidae) and its natural enemies

2004 ◽  
Vol 136 (3) ◽  
pp. 427-442 ◽  
Author(s):  
Peggy L. Dixon ◽  
Juanita R. Coady ◽  
David J. Larson ◽  
Dean Spaner
Keyword(s):  
Natural Enemies ◽  
White Clover ◽  
Delia Radicum ◽  
Carabid Beetles ◽  
Yield Reduction ◽  
Parasitic Hymenoptera ◽  
Bembidion Lampros ◽  
Pterostichus Melanarius ◽  
Cabbage Maggot ◽  
Species Specific

AbstractThe cabbage maggot, Delia radicum (L.), is a serious pest of cruciferous crops in temperate regions of North America and Europe. The effects of undersowing rutabaga, Brassica napus L. subsp. rapifera Metzg. (Brassicaceae), with white clover, Trifolium repens L. (Leguminosae), on second-generation cabbage maggot and its natural enemies were studied in Newfoundland in 1997 and 1998. In 1997, totals of 1311 and 724 eggs were recovered from bare and undersown plots, respectively. More eggs were present in bare plots than undersown plots on various specific dates. In 1997, rutabagas from bare plots weighed more than those from undersown plots, although damage ratings were similar, suggesting that competition, not cabbage maggot feeding, caused the yield differences. In 1998, there were few cabbage maggots present and little damage or yield reduction in either treatment. Similar numbers of cabbage maggot pupae were extracted and reared from each treatment in each year. In 1997, of the pupae reared from undersown plots, 48% produced cabbage maggot flies, 14% produced parasitic Hymenoptera, and 8% produced Aleochara bilineata Gyllenhal (Coleoptera: Staphylinidae); 19% of the pupae from bare plots produced cabbage maggot flies, 8% produced parasitic Hymenoptera, and 36% produced A. bilineata. More A. bilineata were captured in pitfall traps in bare plots than in undersown plots. The effect of clover on carabid beetles was species specific. There were more Bembidion lampros (Herbst) and Amara bifrons (Gyllenhal) in bare plots in 1997, and more Pterostichus melanarius (Illiger) in undersown plots in both years. Despite consistently lower egg numbers in undersown plots than in bare plots, the numbers of pupae in the two treatments were similar at the end of the season. We speculate that this may be due to differential, density-dependent mortality of immature stages of cabbage maggot caused by predators and parasitoids.

Delia radicum (L.), cabbage maggot (Diptera: Anthomyiidae).

2009 ◽  
pp. 99-104
Author(s):  
J. J. Soroka ◽  
U. Kuhlmann ◽  
K. D. Floate ◽  
J. Whistlecraft ◽  
N. J. Holliday ◽  
...  
Keyword(s):  
Delia Radicum ◽  
Cabbage Maggot

Suitability of felt traps to monitor oviposition by cabbage maggot (Diptera: Anthomyiidae)

2002 ◽  
Vol 134 (2) ◽  
pp. 205-214 ◽  
Author(s):  
P.L. Dixon ◽  
R.J. West ◽  
K.B. McRae ◽  
D. Spaner
Keyword(s):  
Brassica Napus ◽  
Soil Sample ◽  
Brassica Oleracea ◽  
Second Generation ◽  
Soil Samples ◽  
Delia Radicum ◽  
Field Conditions ◽  
Early Season ◽  
Cabbage Maggot

AbstractThe effectiveness of felt egg traps to detect oviposition by the cabbage maggot, Delia radicum (L.), was studied under field conditions for cabbage, Brassica oleracea L. var. capitata L. (Brassicaceae), and rutabaga, Brassica napus L. var. napobrassica (L.) Reichenb. (Brassicaceae), in 1994 and 1995. The numbers of eggs laid on traps were compared with the numbers deposited in the soil next to the plant. Also, the incidence of oviposition (i.e., the percentage of samples with eggs) on soil and traps was compared. A total of 5160 eggs was collected from 5208 samples, but just 16% of all samples had eggs. For cabbage, early in the 1994 season, the incidence of oviposition in soil samples was double that on traps, and the number of eggs per sample was greater also. Oviposition incidence and the number of eggs per sample during the rest of the summer were similar. In the 1995 cabbage trial, the incidence of oviposition early in the season was again higher in soil samples than on traps, and there were fewer eggs per trap than per soil sample. For rutabaga, the number of eggs was similar using both methods early in the second generation, but from mid-August there were more eggs per trap than per soil sample. The incidence of oviposition in the rutabaga trial was similar on traps and in soil through most of the experiment. In this study, felt traps did not adequately detect the timing of cabbage maggot oviposition in the critical early season.

Wilt of Radish Caused by Fusarium oxysporum f. sp. raphani in Washington State

2003 ◽  
Vol 4 (1) ◽  
pp. 36 ◽  
Author(s):  
L. J. du Toit ◽  
G. Q. Pelter
Keyword(s):  
Root Rot ◽  
Washington State ◽  
Delia Radicum ◽  
The Us ◽  
The World ◽  
Raphanus Sativus L ◽  
Seedborne Pathogens ◽  
Cabbage Maggot ◽  
Seed Crops ◽  
Widespread Dissemination

Radish (Raphanus sativus L.) seed crops in Washington may annually produce up to 70% of the US and up to 40% of the world supply of radish seed. In May and June 2002, severe symptoms of wilting and dieback were observed in a radish stock seed crop in the Columbia Basin of central Washington. Examination of the roots revealed a dark vascular discoloration and root rot, as well as cabbage maggot (Delia radicum L.) larvae with associated feeding injury. Because of the potential for widespread dissemination of seedborne pathogens, research is needed to determine whether F. oxysporum f. sp. raphani can be seedborne in radish. Accepted for publication 12 May 2003. Published 16 June 2003.

THE EFFECT OF EXCLUSION FENCES ON THE COLONIZATION OF RUTABAGAS BY CABBAGE FLIES (DIPTERA: ANTHOMYIIDAE)

1998 ◽  
Vol 130 (2) ◽  
pp. 153-162 ◽  
Author(s):  
Robert S. Vernon ◽  
John R. Mackenzie
Keyword(s):  
Pest Management ◽  
Damage Index ◽  
Delia Radicum ◽  
Brassica Crops ◽  
The Mean ◽  
Cabbage Maggot ◽  
Heavy Infestation

AbstractA specially constructed fence was developed to exclude cabbage flies, Delia radicum (L.), from plantings of rutabaga. The number of first-flight female D. radicum caught on traps inside fenced enclosures declined linearly with fence height from 0 to 90 cm. Females caught in plots surrounded by a 90 cm high fence were 80.6 and 82.8% fewer than in open check plots in 1991 and 1992, respectively. The percentage of transplanted rutabagas killed by cabbage maggot in the 90 cm high enclosures was 1.4% in 1991 and 25.5% in 1992, compared with 11.8 and 84.5% in the open check plots, respectively. The mean damage index rating for rutabagas was severe in the open check plots but slight in the 90 cm high enclosures in 1991. Only 1.2% of rutabagas in the open check plots would have been of marketable grade in 1991, compared with 54% in the 90-cm enclosures. The mean damage rating was highest in the open check plots in 1992, but damage was also severe in all fenced plots due to the heavy infestation levels that year. The potential of exclusion fences for use in pest-management programs for rutabagas and other brassica crops is discussed.

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