Population Dynamics of Alfalfa Blotch Leafminer, Agromyza frontella (Diptera: Agromyzidae), in Eastern Ontario: Analysis of Numerical Change During the Colonization Phase

Harcourt, D. G.; Guppy, J. C.; Drolet, Jacques; McNeil, Jeremy N.

doi:10.1093/ee/16.1.145

Cited by 5 publications

(2 citation statements)

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“…During the late 1970s and early 1980s the exotic parasite Cyrtogaster vulgaris Walker was among several indigenous species recorded from the alfalfa blotch leafminer, Agromyzafrontella (Rondani), in Ontario (Guppy et al 1984;Coote and Ellis 1986). Parasitism was consistently low, and although all three host generations were attacked, peak incidence averaged 3.5%, or less, annually during an &year period (Harcourt et al 1987(Harcourt et al , 1988.…”

Section: Introductionmentioning

confidence: 98%

NOTE ONCYRTOGASTER VULGARISWALKER (HYMENOPTERA: PTEROMALIDAE), A SECONDARY PARASITE OF THE ALFALFA BLOTCH LEAFMINER (DIPTERA: AGROMYZIDAE), WITH DESCRIPTIONS OF THE IMMATURE STAGES

Guppy

Meloche

1989

Can Entomol

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Can. Ent. 121: 929-932 (1989) Cyrtogaster vulgaris Walker, a pupal parasite of the alfalfa blotch leafminer, Agromyza frontella (Rondani), acts as a secondary agent as well. The adults, which deposit their eggs within host puparia, apparently do not discriminate between healthy leafminers and those parasitized by Dacnusa dryas (Nixon). The egg and larval cephalic structures of C. vulgaris are described and illustrated and the final-instar larval skins of the two parasite species are compared. ResumeCyrtogaster vulgaris Walker, parasite de la pupe de I'agromyze de la luzerne, Agromyza frontella (Rondani), se manifeste Bgalement comme agent secondaire. Les adultes, qui pondent leurs oeufs h l'interieur du puparium de l'hBte, ne semblent pas pouvoir distinguer les agromyzes sains de ceux parasites par Dacnusa dryas (Nixon). Les auteurs presentent une description et des figures de l'oeuf et des structures cephaliques larvaires de C. vulgaris, et comparent les cuticules du dernier stade larvaire des deux es@ces parasites.

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Section: Introductionmentioning

confidence: 98%

NOTE ONCYRTOGASTER VULGARISWALKER (HYMENOPTERA: PTEROMALIDAE), A SECONDARY PARASITE OF THE ALFALFA BLOTCH LEAFMINER (DIPTERA: AGROMYZIDAE), WITH DESCRIPTIONS OF THE IMMATURE STAGES

Guppy

Meloche

1989

Can Entomol

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“…This quotient is an unbiased estimate of the number of individuals entering the stage if there is no mortality in the stage or it occurs only at the end of the stage (SouTHWOOD, 1978). In practice, this technique has been applied to insects where these restrictions are not met (e.g., GARGIULLO and BERISFORD, 1983;PEDIGO et al, 1983;ABBAS and NAKAMURA, 1985;HAINZE and BENJAMIN, 1985;HARCOURT et al, 1987). Mortality causes the area under the stage-frequency plot to underestimate the numbers entering the stage, as not all individuals entering the stage survive to their next molt.…”

Section: Introductionmentioning

confidence: 99%

Extensions to Southwood and Jepson's graphical method of estimating numbers entering a stage for calculating mortality due to parasitism

1989

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Summary Seven methods of estimating percentage parasitism using graphical estimates of host or parasitoid recruitment are presented. Biases affecting these percentage parasitism estimates arise from the effect of mortality on graphical estimates of numbers entering a stage. These biases result in underestimation of parasitism in some of the methods examined and overestimation in others. The methods and their biases are discussed and illustrated with reference to data from four generations of Pieris rapae (L.) parasitized by Cotesia glomerata (L.). The general impact of these biases are discussed with reference to situations where the methods might be applied.

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Parasitism of Natural Populations of Liriomyza helianthi Spencer and Calycomyza platyptera (Thomson) (Diptera: Agromyzidae)

Gratton

Welter

2001

Biological Control

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Population Dynamics of Alfalfa Blotch Leafminer, Agromyza frontella (Diptera: Agromyzidae), in Eastern Ontario: Analysis of Numerical Change During the Colonization Phase

Cited by 5 publications

References 0 publications

NOTE ONCYRTOGASTER VULGARISWALKER (HYMENOPTERA: PTEROMALIDAE), A SECONDARY PARASITE OF THE ALFALFA BLOTCH LEAFMINER (DIPTERA: AGROMYZIDAE), WITH DESCRIPTIONS OF THE IMMATURE STAGES

NOTE ONCYRTOGASTER VULGARISWALKER (HYMENOPTERA: PTEROMALIDAE), A SECONDARY PARASITE OF THE ALFALFA BLOTCH LEAFMINER (DIPTERA: AGROMYZIDAE), WITH DESCRIPTIONS OF THE IMMATURE STAGES

Extensions to Southwood and Jepson's graphical method of estimating numbers entering a stage for calculating mortality due to parasitism

Parasitism of Natural Populations of Liriomyza helianthi Spencer and Calycomyza platyptera (Thomson) (Diptera: Agromyzidae)

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