NOTE ON CYRTOGASTER VULGARIS WALKER (HYMENOPTERA: PTEROMALIDAE), A SECONDARY PARASITE OF THE ALFALFA BLOTCH LEAFMINER (DIPTERA: AGROMYZIDAE), WITH DESCRIPTIONS OF THE IMMATURE STAGES

1989 ◽  
Vol 121 (11) ◽  
pp. 929-932 ◽  
Author(s):  
J.C. Guppy ◽  
F. Meloche
Keyword(s):  
Parasite Species ◽  
Immature Stages ◽  
Secondary Parasite ◽  
Pupal Parasite ◽  
Alfalfa Blotch Leafminer ◽  
Agromyza Frontella

AbstractCyrtogaster 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.

LIFE HISTORY AND DESCRIPTION OF THE IMMATURE STAGES OF DACNUSA DRYAS (NIXON) (HYMENOPTERA: BRACONIDAE), A EUROPEAN PARASITE OF THE ALFALFA BLOTCH LEAFMINER (DIPTERA: AGROMYZIDAE) IN EASTERN CANADA

1987 ◽  
Vol 119 (3) ◽  
pp. 281-285 ◽  
Author(s):  
J.C. Guppy ◽  
F. Meloche
Keyword(s):  
Life History ◽  
Immature Stages ◽  
Eastern Canada ◽  
Mature Larva ◽  
Alfalfa Blotch Leafminer ◽  
Agromyza Frontella

AbstractDacnusa dryas (Nixon), a multivoltine parasite of the alfalfa blotch leafminer, Agromyza frontella (Rondani), has become established in eastern Canada. Adults deposit their eggs singly in the hemocoel of the actively feeding host larvae. A trophamnion forms between the chorion and the embryo and the elliptical egg swells, becoming spherical and transparent. On hatching, the trophamnion adheres to the 1st instar throughout its development. The first moult occurs in the newly formed puparium where development of the parasite is completed. Winter is passed as a mature larva within the soil-borne host. Descriptions of the immature stages are given.

ALFALFA BLOTCH LEAFMINER, AGROMYZA FRONTELLA (DIPTERA: AGROMYZIDAE), EFFECTS ON ALFALFA IN VERMONT

1982 ◽  
Vol 114 (8) ◽  
pp. 673-680 ◽  
Author(s):  
G. B. MacCollom ◽  
G. L. Baumann ◽  
N. L. Gilroy ◽  
J. G. Welch
Keyword(s):  
Native Species ◽  
Parasite Species ◽  
Fiber Quality ◽  
Field Evaluation ◽  
Dry Weight ◽  
Economic Threshold ◽  
Acid Detergent Fiber ◽  
Leaf Mining ◽  
Alfalfa Blotch Leafminer ◽  
Agromyza Frontella

AbstractSeven years of field evaluation has shown the alfalfa blotch leafminer, Agromyza frontella (Rondani), to be of minor economic importance in Vermont. Although response to certain insecticidal treatments resulted in highly significant reduction in leaf mining at time of cut, no other differences were shown. Analyses of fiber content as measured by lignin, cell wall constituents, acid detergent fiber, quality as measured by % protein and % digestibility, and yields in dry weight (kg/ha) showed no significant differences. Comparison of leaflet dehiscence from field-cured and baled samples failed to indicate differences between blotched and healthy alfalfa.Two imported parasite species, Chrysocharis punctifacies Delucchi and Dacnusa dryas (Nixon), are established within the state; we predict that these parasites combined with native species will effect a decline in alfalfa blotch leafminer levels below any conceivable economic threshold.

Identification of female sex pheromone in alfalfa blotch leafminer,Agromyza frontella (Rondani)(Diptera: Agromyzidae)

1988 ◽  
Vol 14 (3) ◽  
pp. 947-956 ◽  
Author(s):  
Yves Carri�re ◽  
Jocelyn G. Millar ◽  
Jeremy N. McNeil ◽  
David Miller ◽  
E. W. Underbill
Keyword(s):  
Sex Pheromone ◽  
Female Sex Pheromone ◽  
Female Sex ◽  
Alfalfa Blotch Leafminer ◽  
Agromyza Frontella

Size influences male mating success in the alfalfa blotch leafminer (Diptera: Agromyzidae)

2001 ◽  
Vol 133 (5) ◽  
pp. 717-719 ◽  
Author(s):  
Arild Andersen ◽  
Jeremy N. McNeil
Keyword(s):  
Reproductive Success ◽  
Male Mating ◽  
Female Size ◽  
Larval Competition ◽  
Female Reproduction ◽  
Male Size ◽  
Female Life History ◽  
Males And Females ◽  
Alfalfa Blotch Leafminer ◽  
Agromyza Frontella

Male size is an important parameter in mate choice for many species and has been associated with such female life-history parameters as increased fecundity or fertility and larger progeny (Phelan and Baker 1986; Savalli and Fox 1998, 1999; Brown 1999). In the alfalfa blotch leafminer, Agromyza frontella (Rondani), intraspecific larval competition may significantly influence the size of both males and females (Quiring and McNeil 1984a). The influence of female size on female reproductive success has been studied (Quiring and McNeil 1984b, 1984c), but to date, no attention has been given to the possible effects of male size. The objectives of this study were to determine if differences in male size, the result of intraspecific larval competition, affected male longevity and reproductive success, as well as various parameters of female reproduction.

BIONOMICS OF THE ALFALFA BLOTCH LEAFMINER, AGROMYZA FRONTELLA (DIPTERA: AGROMYZIDAE), IN EASTERN ONTARIO

1981 ◽  
Vol 113 (7) ◽  
pp. 593-600 ◽  
Author(s):  
J. C. Guppy
Keyword(s):  
Lower Epidermis ◽  
Thermal Requirements ◽  
Linear Relationships ◽  
Developmental Rates ◽  
Eastern Ontario ◽  
Highly Correlated ◽  
Alfalfa Blotch Leafminer ◽  
Agromyza Frontella

AbstractThe alfalfa blotch leafminer, Agromyza frontella (Rondani), typically develops through three complete generations a year. It overwinters as a partially developed pupa that completes its development in mid-May. Three distinct adult flight periods occur: mid-May to mid-June, late June to late July, and early to late August. Eggs are deposited singly in alfalfa leaflets beneath the lower epidermis and on hatching, the larvae move toward the upper leaflet surface where they feed on the mesophyll and develop through three instars to form blotch mines, each representing about 27% of the leaflet area. The mature larvae emerge from the mines and drop to the soil to form light brown puparia, mainly in the top 2.5 cm of soil.Duration of each stage decreased with rise in temperature up to 25° but none of the stages survived 30°C. Developmental rates plotted against temperature gave highly correlated linear relationships for all stages. The theoretical threshold for the egg, larva, and pupa was 7°, 3°, and 4°C, respectively; thermal requirements for these stages were 55, 123, and 333°D, respectively.Survival of the larvae was higher in leaflets with solitary mines than in those with multiple mines; only 25% of the leaflets with two mines gave rise to two mature larvae. Three larvae seldom survived in a single leaflet.

Stereoselective syntheses of isomers of 3,7-dimethylnonadecane, a sex pheromone of the alfalfa blotch leafminer (Agromyza frontella (Rondani))

1991 ◽  
Vol 69 (7) ◽  
pp. 1100-1106 ◽  
Author(s):  
David Miller ◽  
François Bilodeau ◽  
Robert H. Burnell
Keyword(s):  
Optical Properties ◽  
Sex Pheromone ◽  
Key Words ◽  
Stereoselective Synthesis ◽  
Starting Material ◽  
The Other ◽  
Stereogenic Center ◽  
Stereoselective Syntheses ◽  
Alfalfa Blotch Leafminer ◽  
Agromyza Frontella

Two related stereoselective syntheses of 3,7-dimethylnonadecane, a sex pheromone of the alfalfa leafminer, are described to show that pulegone can serve as a useful starting material for the preparation of chiral aliphatic isoprenoid compounds. The schemes are designed to place the stereogenic center of pulegone at C.3 in one synthesis and at C.7 in the other so that the optical properties of the products can be compared with one another and with the values calculated using Brewster's rules. Key words: chiral hydrocarbons, stereoselective synthesis, pheromone, Agromyza frontella.

PRIMARY AND SECONDARY PARASITES OF AN ALFALFA-INFESTING APHID, THERIOAPHIS SP., IN MANITOBA

1987 ◽  
Vol 119 (9) ◽  
pp. 857-858
Author(s):  
H.G. Wylie ◽  
H.E. Bisdee
Keyword(s):  
Medicago Sativa ◽  
North American ◽  
Parasite Species ◽  
North American Species ◽  
Gelatin Capsules ◽  
Secondary Species ◽  
Parasite Larva ◽  
Secondary Parasite

In 1984 and 1985 a total of 51 mummies of the genus Therioaphis sp. (Hornoptera: Aphididae) were collected on alfalfa, Medicago sativa L., in several localities in southern Manitoba: Glenlea, Oakbank, Rosenort, St. Adolphe, and Ste. Agathe [status of North American species of Therioaphis is uncertain; some workers regard Therioaphis on alfalfa and those on clover as different species, whereas others regard those found on alfalfa as merely strains of the species from clover (A.G. Robinson, personal comrnunication)]. The mummies were held in gelatin capsules at 20°C and a 16L:8D cycle, and 44 parasite adults that emerged were identified. Two primary parasites pecies. Praon exsolelurn (Nees) and Binodoxys sp. (Hymenoptera: Aphidiidae), were recorded (Table 1). Cocoons from which adults of P. exsoleturn emerged were formed between the mummy and the substratum, whereas cocoons of the two Binodoxys specimens were inside the mummies. The three secondary parasite species (Table 1) emerged only from the hosts with external cocoons and presumably had developed on P. exsoleturn. Each of the seven hosts from which no parasites emerged had an external cocoon which contained a decomposed parasite larva, either P. exsoletum or one of the secondary species.

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