DESCRIPTION OF THE IMMATURE STAGES OF PANZERIA AMPELUS (WALKER) (DIPTERA: TACHINIDAE), AN OCCASIONAL PARASITOID OF THE BERTHA ARMYWORM, MAMESTRA CONFIGURATA (WALKER), IN WESTERN CANADA

1990 ◽  
Vol 122 (2) ◽  
pp. 381-385 ◽  
Author(s):  
A.P. Arthur ◽  
Y.M. Powell
Keyword(s):  
Western Canada ◽  
Immature Stages ◽  
Mamestra Configurata ◽  
Bertha Armyworm

AbstractThe immature stages of Panzeria ampelus (Walker) are described and illustrated.

THE LIFE HISTORY AND IMMATURE STAGES OF BANCHUS FLAVESCENS (HYMENOPTERA: ICHNEUMONIDAE), A PARASITOID OF THE BERTHA ARMYWORM, MAMESTRA CONFIGURATA (LEPIDOPTERA: NOCTUIDAE) IN WESTERN CANADA

1985 ◽  
Vol 117 (10) ◽  
pp. 1249-1255 ◽  
Author(s):  
A.P. Arthur ◽  
P.G. Mason
Keyword(s):  
Life History ◽  
Western Canada ◽  
Immature Stages ◽  
Mamestra Configurata ◽  
Larval Instars ◽  
Parasitoid Development ◽  
Lepidoptera Noctuidae ◽  
Bertha Armyworm

AbstractBanchus flavescens Cresson is the most abundant hymenopterous parasitoid of the bertha armyworm, Mamestra configurata Walker, in western Canada. The females attack 1st, 2nd, and 3rd instars of the host. The speed of parasitoid development is adjusted so that the 2nd instar is completed when the host finishes feeding. Banchus flavescens has an obligate diapause and overwinters as a prepupa within a cocoon in the soil. Notes on life history and descriptions of the egg and 5 larval instars of B. flavescens are given.

FIRST RECORD OF TRICHOGRAMMA INYOENSE (HYMENOPTERA: TRICHOGRAMMATIDAE) ATTACKING THE BERTHA ARMYWORM, MAMESTRA CONFIGURATA (LEPIDOPTERA: NOCTUIDAE)

1998 ◽  
Vol 130 (1) ◽  
pp. 105-106 ◽  
Author(s):  
P.G. Mason ◽  
J.D. Pinto ◽  
Z.L. Long ◽  
J.L. Harris
Keyword(s):  
Current Trend ◽  
First Record ◽  
Management Program ◽  
Western Canada ◽  
Mamestra Configurata ◽  
Major Pest ◽  
Negative Impacts ◽  
Agriculture And Food ◽  
The Impact ◽  
Bertha Armyworm

The bertha armyworm, Mamestra configurata Walker, is a major pest of canola in western Canada. In 1994, 1995, and 1996 more than 670 000, 650 000, and 250 000 ha of canola were sprayed for bertha armyworm, respectively (Anonymous 1994, 1995, 1996). Despite the current trend towards increased acreage of canola production in western Canada, canola acreages declined markedly in 1996 from that planted in 1995 (Saskatchewan Agriculture and Food Statistical Facts 1996) in part because of the perception by farmers of the impact of bertha armyworm outbreaks in 1994 and 1995. Much research has been carried out in western Canada on the bertha armyworm with the aim of developing an integrated pest management program which includes the understanding of its biological control agents. Turnock (1984) reported that the native parasitoid complex of larval M. configurata consists of five species of Hymenoptera and 10 species of Diptera. Only two of these, namely Banchus flavescens Cresson (Hymenoptera: Ichneumonidae) and Athrycia cinerea (Coquillett) (Diptera: Tachinidae), have large negative impacts on its populations (Wylie and Bucher 1977).

A MELANOTIC MUTANT OF THE MOTH MAMESTRA CONFIGURATA (LEPIDOPTERA: NOCTUIDAE)

1977 ◽  
Vol 109 (3) ◽  
pp. 479-480
Author(s):  
Robert P. Bodnaryk
Keyword(s):  
Western Canada ◽  
Mamestra Configurata ◽  
Lepidoptera Noctuidae ◽  
Bertha Armyworm

The bertha armyworm, Mamestra configurata Wlk., is a periodic pest of rape in western Canada. After a massive outbreak of the species during 1971 and 1972, investigations on the insect were intensified in many laboratories. A technique for rearing the larvae on a semi-defined diet was developed by our Winnipeg-based group and has been used successfully to rear 21 consecutive generations of M. configurata in the laboratory (Bucher and Bracken 1976). Our current culture originated from a few pupae field-collected in Alberta and has been carried through 21 generations without addition of new stock.

LIFE HISTORY AND IMMATURE STAGES OF THE PARASITOID MICROPLITIS MEDIATOR (HYMENOPTERA: BRACONIDAE), REARED ON THE BERTHA ARMYWORM MAMESTRA CONFIGURATA (LEPIDOPTERA: NOCTUIDAE)

1986 ◽  
Vol 118 (5) ◽  
pp. 487-491 ◽  
Author(s):  
A.P. Arthur ◽  
P.G. Mason
Keyword(s):  
Biological Control ◽  
Life History ◽  
Immature Stages ◽  
Mamestra Configurata ◽  
Microplitis Mediator ◽  
Larval Stages ◽  
Lepidoptera Noctuidae ◽  
Bertha Armyworm

AbstractMicroplitis mediator (Haliday) is being considered for introduction into Saskatchewan to augment the biological control of the bertha armyworm, Mamestra configurata Walker. It was reared in the laboratory on larvae of the bertha armyworm. Notes on the life history and descriptions of the egg and three larval stages are given.

OBSERVATIONS ON MERICIA AMPELUS (DIPTERA: TACHINIDAE), AN OCCASIONAL PARASITE OF BERTHA ARMYWORM, MAMESTRA CONFIGURATA (LEPIDOPTERA: NOCTUIDAE), IN WESTERN CANADA

1977 ◽  
Vol 109 (7) ◽  
pp. 1023-1024 ◽  
Author(s):  
H.G. Wylie
Keyword(s):  
Host Species ◽  
Western Canada ◽  
Mamestra Configurata ◽  
Insect Parasite ◽  
Large Populations ◽  
Lepidoptera Noctuidae ◽  
Bertha Armyworm ◽  
Made In

Mericia ampelus (Wlk.) was one of seven species of insect parasite reared from larvae of bertha armyworm, Mamestra configurata Wlk., that were collected in August 1972. At that time large populations of the host species were damaging plants of rape, Brassica spp., in numerous localities in western Canada (Wylie and Bucher 1977). As M. ampelus had not been reared before from M. configurata, studies were made in 1973–75 to determine the parasite's distribution and abundance, to obtain information on its biology and behaviour, and to assess its impact on populations of M. configurata.

DENSITY, PARASITISM, AND DISEASE INCIDENCE OF LARVAE OF THE BERTHA ARMYWORM, MAMESTRA CONFIGURATA WALKER (LEPIDOPTERA: NOCTUIDAE), IN MANITOBA, 1973–1986’

1988 ◽  
Vol 120 (5) ◽  
pp. 401-413 ◽  
Author(s):  
W. J. Turnock
Keyword(s):  
Disease Incidence ◽  
Population Declines ◽  
Mamestra Configurata ◽  
Trends Over Time ◽  
Nuclear Polyhedrosis ◽  
Physiographic Regions ◽  
River Plain ◽  
Swan River ◽  
Lepidoptera Noctuidae ◽  
Bertha Armyworm

AbstractPopulations of larvae of the bertha armyworm, Mamestra configurata Wlk., in four physiographic regions of Manitoba showed similar trends over time: a decline from the outbreak of 1971–1972 to very low densities in 1975–1977, an increase to a peak during the years 1979–1981, and a subsequent decline. During the period of peak larval populations, brief (1 or 2 years) outbreaks [at least some fields with > 20 larvae per square metre) occurred at five locations in two regions, the Swan River Plain and the Valley River Plain, but not in the Western Uplands or the Manitoba Lowlands. In the first two regions, larval densities rose rapidly (from < 1.6 to > 13.8/m2) in 1 year. Although the general trend of population density was similar, there were differences in density among and within regions, and in the timing, severity, and duration of peak populations. Two parasitoids (Banchus flavescens Cress., Athrycia cinerea (Coq.)) and two pathogens (a nuclear polyhedrosis virus (NPV) and fungi of the Entomophthorales) occurred regularly in larval populations. Of these, B. flavescens had the highest constancy among collections and may help to keep bertha armyworm populations at low densities. NPV was rarely found among larvae from low-density populations but appeared in all populations that reached outbreak levels. No single biotic agent could be associated with the population declines because of multiple parasitism and the difficulty in partitioning mortality when only a single sample could be taken. The rapid increase of bertha armyworm larvae from very low to outbreak levels in 1 year will prevent predictions of outbreaks from being based on larval densities in the preceding year.

EFFECT OF LATITUDE ON THE CRITICAL PHOTOPERIOD FOR DIAPAUSE INDUCTION IN THE BERTHA ARMYWORM, MAMESTRA CONFIGURATA (LEPIDOPTERA: NOCTUIDAE)

1983 ◽  
Vol 115 (8) ◽  
pp. 1039-1042 ◽  
Author(s):  
B. M. Hegdekar
Keyword(s):  
Temperature Regime ◽  
Diapause Induction ◽  
The Other ◽  
Fluctuating Temperature ◽  
Mamestra Configurata ◽  
Ambient Temperatures ◽  
Critical Photoperiod ◽  
Lepidoptera Noctuidae ◽  
H 20 ◽  
Bertha Armyworm

AbstractThe critical photoperiod for diapause induction in pupae of Mamestra configurata Walker in Manitoba was 16 h 06 min at Glenlea (49°38′ N), 16 h 20 min at Grandview (51°10′ N), and 16 h 42 min at Birch River (52°24′ N). The differences in cirtical photoperiods observed at Glenlea and Grandview were not significant. At least two different photoperiods exist, one in the Glenlea and Grandview areas and the other in the Birch River area. In the laboratory, the critical photoperiod was 13.5 h when larvae were exposed to a daily fluctuating temperature regime of 12 h at 25 °C and 12 h at 10 °C. Longer critical photoperiods found for the field populations may be related to the relatively low ambient temperatures to which the larvae were exposed in field cages.

EFFECTS OF AGE, EGG DEVELOPMENT, AND MATING ON CALLING BEHAVIOR OF THE BERTHA ARMYWORM, MAMESTRA CONFIGURATA WALKER (LEPIDOPTERA: NOCTUIDAE),

1986 ◽  
Vol 118 (12) ◽  
pp. 1221-1230 ◽  
Author(s):  
M.A. Howlader ◽  
G.H. Gerber
Keyword(s):  
Refractory Period ◽  
Egg Laying ◽  
Calling Behavior ◽  
Diel Periodicity ◽  
Egg Development ◽  
Mamestra Configurata ◽  
First Time ◽  
Lepidoptera Noctuidae ◽  
Bertha Armyworm

AbstractThe effects of age, egg development, and mating on calling behavior of the bertha armyworm, Mamestra configurata Walker, were studied at 20°C, 60% RH, and a 16-h L: 8-h D photoperiod. Most virgin females called and copulated for the first time during the second or third scotophase after emergence. The first copulation was 17.0 ± 0.2 h (mean±SE) long and was terminated within 1 h after lights off in the scotophase following the initiation of copulation. The ovaries contained the first chorionated eggs before the beginning of the second scotophase after emergence. The first egg laying occurred during the same scotophase in which the first copulation was terminated, i.e. scotophase three or four. Almost 75% of the eggs were laid by the end of the seventh scotophase after emergence. Mated females resumed calling after a refractory period of about 2 days. Once calling was resumed after copulation, most females laid eggs and called nightly, with egg laying occurring during the first 5–6 h and calling during the last 2–3 h of the scotophase. Mated females called for a shorter period during each scotophase than virgin females of the same age (1–3 h vs. 4–6 h). In virgin females, the diel periodicity of calling was advanced and the length of the daily calling period was increased with age until the seventh scotophase after emergence; thereafter, both remained relatively unchanged.

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