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.

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.

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.

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.

OBSERVATIONS ON ATHRYCIA CINEREA (DIPTERA: TACHINIDAE), A PARASITE OF MAMESTRA CONFIGURATA (LEPIDOPTERA: NOCTUIDAE)

1977 ◽  
Vol 109 (5) ◽  
pp. 747-754 ◽  
Author(s):  
H.G. Wylie
Keyword(s):  
Life History ◽  
Mamestra Configurata ◽  
Lower Capacity ◽  
Lepidoptera Noctuidae ◽  
Athrycia Cinerea ◽  
Common Parasite ◽  
Bertha Armyworm ◽  
Prairie Provinces

AbstractAthrycia cinerea (Coq.) is a univoltine parasite of bertha armyworm, Mamestra configurata Wlk., on rapeseed in the Prairie Provinces of Canada. Details of the parasite’s seasonal life history are presented. Females oviposit on third, fourth, fifth, and sixth instars of bertha armyworm, and the parasite larvae usually develop gregariously and mature on the fifth and sixth instars. Supernumerary parasite larvae on superparasitized hosts starve; surviving larvae develop more rapidly, form smaller pupae with a lower capacity for survival, and eventually produce a consistently though not significantly smaller percentage of female adults than parasites that develop on non-superparasitized hosts. Larvae of A. cinerea are often killed if they compete with larvae of Banchus flavescens Cress., the only other common parasite of bertha armyworm, and a small percentage of the pupae of A. cinerea are killed by a hyperparasitic ichneumonid, Phygadeuon subfuscus Cress.

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.

BIOLOGICAL OBSERVATIONS AND LARVAL DESCRIPTIONS OF ENARGIA DECOLOR (LEPIDOPTERA: NOCTUIDAE) ON TREMBLING ASPEN IN NORTHERN ALBERTA

1976 ◽  
Vol 108 (11) ◽  
pp. 1213-1220 ◽  
Author(s):  
H. R. Wong ◽  
J. C. E. Melvin
Keyword(s):  
Life History ◽  
Larval Instar ◽  
Immature Stages ◽  
Trembling Aspen ◽  
Larval Instars ◽  
Northern Alberta ◽  
Lepidoptera Noctuidae

AbstractThe life history and the immature stages, especially the ultimate larval instar, of Enargia decolor (Walker), are described and illustrated. This insect has only one generation a year in northern Alberta. It overwinters in the egg stage. The first two larval instars roll leaves and feed on the mesophyll. The last four larval instars feed on the edge of the leaves, and construct flat cases by webbing two leaves together. Pupation occurs in the soil during July. Adults emerge from late July until late August; the eggs are laid in August. Fifteen species of parasites and one species of hyperparasite were reared from larvae of E. decolor. Five of the parasites are known to have issued from other lepidopterous species feeding on aspen.

DESCRIPTIONS OF THE IMMATURE STAGES AND ADULT REPRODUCTIVE SYSTEMS OF ATHRYCIA CINEREA (COQ.) (DIPTERA: TACHINIDAE), A NATIVE PARASITOID OF MAMESTRA CONFIGURATA (WALK.) (LEPIDOPTERA: NOCTUIDAE)

1989 ◽  
Vol 121 (12) ◽  
pp. 1117-1123 ◽  
Author(s):  
A.P. Arthur ◽  
Yvonne M. Powell
Keyword(s):  
Immature Stages ◽  
Reproductive Systems ◽  
Mamestra Configurata ◽  
Male And Female ◽  
Larval Instars ◽  
Lepidoptera Noctuidae ◽  
Athrycia Cinerea

AbstractThe immature stages of Athrycia cinerea (Coq.) including the egg, three larval instars, and the puparium are described and illustrated. The male and female reproductive systems are also illustrated and described and notes on oogenesis are provided.

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.

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