NOTE ON EGG-LAYING RESPONSE OF TWO SPECIES OF ROOT MAGGOTS ON TURNIPS BRED FOR RESISTANCE TO THE CABBAGE ROOT MAGGOT, HYLEMYA BRASSICAE (BOUCHÉ)

1962 ◽  
Vol 42 (3) ◽  
pp. 530-531 ◽  
Author(s):  
D. D. Pond ◽  
L. A. Dionne ◽  
R. G. White ◽  
C. A. Moore
Keyword(s):  
Egg Laying ◽  
Cabbage Root Maggot ◽  
Hylemya Brassicae ◽  
Root Maggot

not available

Rearing Root Maggots, Chiefly Hylemya brassicae (Bouché) (Diptera: Anthomyiidae) for Bioassay

1965 ◽  
Vol 97 (2) ◽  
pp. 136-141 ◽  
Author(s):  
D. C. Read
Keyword(s):  
Mass Rearing ◽  
Onion Maggot ◽  
Seed Corn ◽  
First Instar ◽  
Cabbage Root Maggot ◽  
Hylemya Brassicae ◽  
Root Maggot ◽  
Eggs And Larvae

AbstractDetails of a method of mass rearing eggs and larvae of the cabbage root maggot, Hylemya brassicae (Bouché) for bioassay and of continuous propagation of all stages of the pest are described. The technique was equally suitable for rearing the onion maggot H. antiqua (Meig.), the seed corn maggot H. calicruraliturata (Rond.) and the carrot rust fly, Psila rosa (L.). Under the conditions described, 2000-2500 eggs or first-instar larvae of H. brassicae were obtained from 50-60 female flies in 24 hours, or 1000-1200 mature larvae or pupae were reared from eggs produced by 25 female flies in approximately 20 days.

Chemical Control of the Cabbage Root Maggot Integrated with Natural Controls

1964 ◽  
Vol 96 (1-2) ◽  
pp. 136-137 ◽  
Author(s):  
D. C. Read
Keyword(s):  
Prince Edward Island ◽  
Soil Surface ◽  
Carabid Beetles ◽  
Plant Roots ◽  
Aleochara Bilineata ◽  
Scatophaga Stercoraria ◽  
Plant Foliage ◽  
Cabbage Root Maggot ◽  
Hylemya Brassicae ◽  
Root Maggot

Application of 5 Ibs. toxicant Ileptachlor or aldrin per acre placed in a 4- to 5-inch hand about 1½ inches below the surface of the soil in a ridged seeding drill have controlled infestations of the cabbage root maggot, Hylemya brassicae (Bouche) in cabbage and rutabagas for eight consecutive years on one farm in Prince Edward Island without detectable indications of resktance. The insecticide is so placed in the soil as to be most concentrated against the young root maggot larvae and least concentrated against the following predators and parasites: Coenosia tigrina (Fall.) and Scatophaga stercoraria. (L.), which attack and destroy H. brassicae flies in flight, on the soil surface, or on plant foliage; various species of Carabid beetles which destroy H. brassicae eggs at or near the soil surface, Trybliographa rapae (L.), the larvae of which parasitize and destroy H. brassicae larvae in the plant roots; and Aleochara bilineata (Gyll.), with adults destroying H. brassicae eggs or young larvae near the soil surface, and larvae in the plant roots, and the larvae parasitising H. brassicae puparia and destroying the pupae. Records of field observations, supplemented with data obtained on green-house determinations of the potential reproduction of both predators and host, indicate that any one of these predators could theoretically eliminate the pest population from an area in two to three generations. They do not eliminate or even give apparent economic control of the pest because a) the aerial attackers do not find and destroy adults of the pest before many eggs are deposited in the soil; b) many eggs are hidden in the soil by wind and rain and thus protected from discovery by predators; and c) larval and puparial parasites attack after the pest has injured the crop.

scholarly journals Insecticides for Control of Cabbage Root Maggot in Spring Cabbage, 2014: Table 1

2015 ◽  
Vol 40 (1) ◽  
pp. E44
Author(s):  
Susan B. Scheufele ◽  
Lisa McKeag ◽  
Katie Campbell-Nelson ◽  
Ruth Hazzard
Keyword(s):  
Cabbage Root Maggot ◽  
Root Maggot

FACTORS INFLUENCING INFESTATION AND INJURY OF RUTABAGAS BY ROOT MAGGOTS (DIPTERA:ANTHOMYIIDAE) IN PRINCE EDWARD ISLAND. I. FIELD STUDIES

1958 ◽  
Vol 38 (2) ◽  
pp. 188-198 ◽  
Author(s):  
D. C. Read
Keyword(s):  
Sandy Soil ◽  
Prince Edward Island ◽  
Growing Season ◽  
Field Studies ◽  
Clay Loam ◽  
High Moisture Content ◽  
High Moisture ◽  
Previous Season ◽  
Hylemya Brassicae ◽  
Root Maggot

Examinations of more than 100 rutabaga fields per year, from 1951 to 1955, showed that Hylemya brassicae (Bouché) was the only species of root maggot that injured rutabagas in Prince Edward Island. H. liturata (Mg.) (= H. trichodactyla (Rond.)), H. cilicrura (Rond.), and Muscina stabulans (Fall.) were associated with H. brassicae but did not injure the roots. H. brassicae flies [note Whitcomb (12) for illustrations] began to emerge from overwintered puparia early in June in sandy soil areas and late in July in clay loam areas. Heavy texture and high moisture content of soils were closely correlated with the delay in emergence. The flies laid their eggs near rutabaga plants, usually in crevices in the soil, and upon hatching the larvae entered and fed on the roots. Larvae generally entered the roots at a depth of one inch or more below the surface of the soil. In general, early-planted rutabagas in sandy soil areas and late plantings in clay loam areas were severely damaged by larvae of H. brassicae, whereas late plantings in sandy areas and early plantings in clay loam areas were lightly infested. However, in the sandy soil areas where all of the rutabaga crops were harvested early in August damage was relatively light. Also, fields isolated by other rutabaga fields from sources of infestation such as storage bins and infested rutabaga crops, of either the current or the previous season, were usually slightly damaged. Use of barnyard manure increased H. brassicae infestations early in the season but did not significantly influence the damage caused during the whole growing season.

ROOT MAGGOT DAMAGE TO CANOLA AND THE DISTRIBUTION OF DELIA SPP. (DIPTERA: ANTHOMYIIDAE) IN MANITOBA

1992 ◽  
Vol 124 (1) ◽  
pp. 49-58 ◽  
Author(s):  
W.J. Turnock ◽  
B. Timlick ◽  
B.E. Galka ◽  
P. Palaniswamy
Keyword(s):  
First Generation ◽  
Delia Radicum ◽  
Feeding Damage ◽  
Yield Losses ◽  
Significant Yield ◽  
The Mean ◽  
Cabbage Root Maggot ◽  
Root Maggot ◽  
Agricultural Regions ◽  
Increasing Precipitation

AbstractThe cabbage root maggot, Delia radicum (L.), was the only Delia species capable of attacking undamaged roots of canola [oilseed rape, Brassica napus (L.)] that was found in commercial fields in Manitoba. Adults of the overwintering generation infest canola. Their progeny, adults of the first generation, left the maturing plants after completing a single generation. Root maggot damage occurred in fields in all agricultural regions of the province. The mean percentage of the roots with damage was higher in the more northerly agricultural regions (15.8%) than in the south (8.0%). Most of the damage was light and the damage did not visibly affect the growth or vigour of the plants. Foot rot fungi were not associated with the feeding damage. In cage experiments, the seed yield of canola did not decrease with increasing proportions of plants damaged by D. radicum. The percentage of plants with root maggot damage (DAM) was best described in a polynomial by the mean daily air temperature (TEMP) and the total precipitation (RAIN) for June and July:log(DAM + 1)=–12.3 + 0.66 TEMP + 0.09 RAIN – 0.004(TEMP × RAIN).The level of damage caused by the larvae of D. radicum to canola in commercial fields during the years 1985 through 1988 did not appear to have caused yield losses. However, the level of damage increased with increasing precipitation and temperature during June and July so a series of favourable years could lead to increased damage and possibly to significant yield losses.

scholarly journals Efficacy of Thiamethoxam Seed Treatments to Control Cabbage Root Maggot in Broccoli, 2014: Table 1

2015 ◽  
Vol 40 (1) ◽  
pp. E43
Author(s):  
Susan B. Scheufele ◽  
Lisa McKeag ◽  
Katie Campbell-Nelson ◽  
Ruth Hazzard
Keyword(s):  
Seed Treatments ◽  
Cabbage Root Maggot ◽  
Root Maggot

scholarly journals Erroneous records of Aleochara bipustulata from North America: an assessment of the evidence

2005 ◽  
Vol 137 (2) ◽  
pp. 182-187 ◽  
Author(s):  
K.S. Hemachandra ◽  
N.J. Holliday ◽  
J. Klimaszewski ◽  
P.G. Mason ◽  
U. Kuhlmann
Keyword(s):  
North America ◽  
Classical Biological Control ◽  
Delia Radicum ◽  
Museum Specimens ◽  
Canadian Prairie ◽  
Aleochara Bilineata ◽  
Palearctic Species ◽  
Cabbage Root Maggot ◽  
Taxonomic Studies ◽  
Root Maggot

AbstractAleochara bipustulata (L., 1761) (Coleoptera: Staphylinidae) is a Palearctic species and a natural enemy of the cabbage root maggot, Delia radicum (L., 1758) (Diptera: Anthomyiidae). It has been identified as a candidate for introduction to Canada for classical biological control of D. radicum. Recent taxonomic studies assert that A. bipustulata is absent from the Nearctic; however, there are numerous publications reporting the presence of the species in North America. We examined voucher material relating to these publications and additional museum specimens labeled as A. bipustulata. In addition, we reared Aleochara spp. from D. radicum puparia collected in the Canadian prairie provinces. Specimens that, based on external anatomy, could be A. bipustulata were definitively identified using characters of the genitalia. All of the 141 museum specimens labeled A. bipustulata were found to be Aleochara verna Say, 1836. A total of 811 individuals of Aleochara spp. were reared from D. radicum puparia; of these, 690 were Aleochara bilineata Gyllenhal, 1810, 121 were A. verna, and none were A. bipustulata. We have found no evidence that A. bipustulata occurs in North America.

scholarly journals Spatial distribution of cabbage root maggot (Delia radicum) and clubroot (Plasmodiophora brassicae) in winter oilseed rape crops in the Czech Republic

2017 ◽  
Vol 53 (No. 3) ◽  
pp. 159-168
Author(s):  
Hlavjenka Vojtěch ◽  
Seidenglanz Marek ◽  
Dufek Aleš ◽  
Šefrová Hana
Keyword(s):  
Spatial Distribution ◽  
Czech Republic ◽  
Oilseed Rape ◽  
Plasmodiophora Brassicae ◽  
Surface Damage ◽  
Root Surface ◽  
Delia Radicum ◽  
Winter Oilseed Rape ◽  
Cabbage Root Maggot ◽  
Root Maggot

The amount and spatial distribution of plants afflicted with cabbage root maggot (Delia radicum; CRM) and clubroot (Plasmodiophora brassicae) in winter oilseed rape crops were assessed in the Olomouc region (Northern Moravia, Czech Republic) over the course of 2012–2014. A total of 16 commercial rape fields were included in the assessments. Plants with tumours showed a significantly lower (P < 0.001) level of infestation induced by CRM (24% of plants infested) compared to plants without tumours (37% of plants infested). According to a generalised linear mixed model, plants with thicker hypocotyls are predisposed to significantly higher levels (P < 0.001) of root surface damage induced by CRM. The correlation analysis indicates rather weak or intermediate levels of correlation between the two variables (hypocotyls thickness × root surface damage induced by CRM). Both CRM and clubroot symptomatic plants showed a significant tendency for aggregation in rape crops, but not in all cases. Distributions of CRM and clubroot symptomatic plants were either significantly spatially dissociated or not associated in crops. Ovipositing D. radicum females showed some tendency to avoid zones with higher number of plants infected by P. brassicae. Distributions of CRM and hypocotyl thickness levels were significantly spatially associated in crops in several cases.

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