THE BERTHA ARMYWORM (<i>MAMESTRA CONFIGURATA</i>) (LEPIDOPTERA: NOCTUIDAE) IN WESTERN CANADA

Mason, Peter G.; Arthur, A. P.; Olfert, O.; Erlandson, Martin A.

doi:10.4039/ent130321-3

Cited by 38 publications

(33 citation statements)

References 48 publications

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“…Mamestra configurata (bertha armyworm) is a Noctuid moth native to western North America and is a serious, sporadic pest of oilseed rapes (Brassica napus and Brassica rapa) and other crops (Turnock, 1985;Mason et al, 1998). A common theme in developing alternate pest control strategies has been to disrupt insect midgut physiology and/or digestive biochemistry.…”

Section: Introductionmentioning

confidence: 99%

Modeling the structure of the Type I peritrophic matrix: characterization of a Mamestra configurata intestinal mucin and a novel peritrophin containing 19 chitin binding domains

Shi

Chamankhah

Visal-Shah

et al. 2004

Insect Biochemistry and Molecular Biology

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Section: Introductionmentioning

confidence: 99%

Modeling the structure of the Type I peritrophic matrix: characterization of a Mamestra configurata intestinal mucin and a novel peritrophin containing 19 chitin binding domains

Shi

Chamankhah

Visal-Shah

et al. 2004

Insect Biochemistry and Molecular Biology

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“…Mamestra configurata (bertha armyworm) is a Noctuid moth native to western North America and has become a serious, sporadic pest of oilseed rapes (Brassica napus and Brassica rapa) and other crops (Turnock, 1985;Mason et al, 1998). A common theme in developing alternate pest control strategies has been to disrupt insect midgut physiology and/or digestive biochemistry.…”

Section: Introductionmentioning

confidence: 99%

Midgut proteases from Mamestra configurata (Lepidoptera: Noctuidae) larvae: Characterization, cDNA cloning, and expressed sequence tag analysis

Hegedus

Baldwin

O’Grady

et al. 2003

Arch Insect Biochem Physiol

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The activities of digestive protease within the midgut of Mamestra configurata (bertha armyworm) larvae were examined using specific substrates and protease inhibitors. The bulk of the activity was associated with serine proteases comprising trypsin-, chymotrypsin-, and elastase-like enzymes. At least 10-15 serine protease isozymes were detected using one-dimension gelatin gel electrophoresis. Cysteine or aspartic protease activities were not present; however, amino- and carboxypeptidase activities were associated with the midgut extract. Midgut proteases were active in the pH range of 5.0-12.0 with peaks at pH 7.5 and 11.0. In general, the middle region of the midgut exhibited a higher pH (approximately 8.0) than either the posterior or anterior regions (approximately 7.3-7.7). Moulting larvae possessed a neutral gut pH that was 0.5-1.5 units below that of feeding larvae. Degenerate PCR and expressed sequence tag (EST)-based approaches were used to isolate 30 distinct serine protease encoding cDNAs from a midgut-specific cDNA library including 8 putative trypsins, 9 chymotrypsins, 1 elastase, and 12 whose potential activities could not be determined. cDNAs encoding three amino- and two carboxypeptidases were also identified. Larvae feeding upon artificial diet containing 0.2% soybean trypsin inhibitor experienced a significant delay in development.

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“…Outbreaks are infrequent and localized (Mason et al 1998). Growers are notified of possible outbreaks based on the results of regional monitoring of adult moths in pheromone traps, which accurately determine the presence of adults but do not predict pest levels in a particular field (Turnock 1987).…”

Section: Introductionmentioning

confidence: 98%

Sequential decision plan for controlling Mamestra configurata in spring canola

2009

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A sequential decision plan was developed for controlling larvae of the bertha armyworm, Mamestra configurata Walker (Lepidoptera: Noctuidae), in canola (Brassica napus L. and B. rapa L., Brassicaceae), using 0.25 and 0.5 m 2 sampling units. Fields in Manitoba were sampled from 1980 to 1994 to determine minimum sample sizes and upper and lower cumulative larval counts at three economic thresholds. Taylor's power law described most of the variation between mean larval density and variance for 0.25 m 2 (r 2 5 0.926) and 0.5 m 2 (r 2 5 0.924) samples. Larvae were found to have a moderately clumped distribution in canola (b 5 1.42). Levels of precision (D 0 ) varying from 0.15 to 0.25 caused minimum sample sizes to vary between 6 and 21 for the 0.5 m 2 samples to between 9 and 31 for the 0.25 m 2 samples, for an economic threshold of 16-24 larvae/m 2 (P 5 0.20). Mean sampling times ranged from 40-108 for the 0.25 m 2 samples to 49-126 min for the 0.5 m 2 samples. The sampling plan for the 0.25 m 2 samples was verified in 18 fields in 2006 and 2007. A correct decision was made in 87% (D 0 5 0.25), 91% (D 0 5 0.20), and 94% (D 0 5 0.15) of the fields when the recommendation was to spray if a decision could not be reached after a second sampling. The mean number of samples needed for making a decision was 14 (D 0 5 0.25), 19 (D 0 5 0.20), and 32 (D 0 5 0.15).We recommend that growers use a precision level of 0.20 to minimize error rates and sampling effort. In most years, the minimum number of 0.25 m 2 samples per field that growers would need to take is 14-17.

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THE BERTHA ARMYWORM (MAMESTRA CONFIGURATA) (LEPIDOPTERA: NOCTUIDAE) IN WESTERN CANADA

Cited by 38 publications

References 48 publications

Modeling the structure of the Type I peritrophic matrix: characterization of a Mamestra configurata intestinal mucin and a novel peritrophin containing 19 chitin binding domains

Modeling the structure of the Type I peritrophic matrix: characterization of a Mamestra configurata intestinal mucin and a novel peritrophin containing 19 chitin binding domains

Midgut proteases from Mamestra configurata (Lepidoptera: Noctuidae) larvae: Characterization, cDNA cloning, and expressed sequence tag analysis

Sequential decision plan for controlling Mamestra configurata in spring canola

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