THE DYNAMICS OF <i>APHIS POMI</i> DE GEER (HOMOPTERA: APHIDIDAE) AND ITS PREDATOR, <i>APHIDOLETES APHIDIMYZA</i> (RONDANI) (DIPTERA: CECIDOMYIIDAE), ON APPLE IN NOVA SCOTIA

Stewart, Heather Christine; Walde, Sandra J.

doi:10.4039/ent129627-4

Cited by 20 publications

(16 citation statements)

References 19 publications

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“…D. plantaginea and E. lanigerum reappeared in November but with in very small numbers. In apple orchards in Wisconsin, California and Nova Scotia, A. pomi population showed a more or less similar fluctuation to that recorded in the present study (Oatman and Legner 1961, Westigard and Madsen 1965, Braun 1991, Stewart and Walde 1997. In Ohio apple orchards A. pomi population showed a peak in July as occured in our study, but D. plantaginea fluctuation was different than in our study, as it was conspicuous in June and reached a peak on August 1 (Holdsworth 1970).…”

Section: Discussionsupporting

confidence: 76%

“…Bouchard et al (1986) referred 60 predators and parasitoids active against A. pomi while in California apple orchards, the main predator was the coccinellid Coccinella novemnotata Herbst. (Oatman and Legner 1961) and in Quebec the midge Aphidoletes aphidimyza (Rondani) (Stewart and Walde 1997). In central Washington 39 predators and 2 parasitoids were recorded (Carrol and Hoyt 1984) and in Ohio apple orchards, syrphids, hemerobiids, coccinellids and in low numbers the anthocorid Orius insidiosus (Say) (Holdsworth 1970).…”

Section: Discussionmentioning

confidence: 99%

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Temporal asynchrony, spatial segregation and seasonal abundance of aphids on apple trees

Perdikis

Lykouressis

Mitropoulou

et al. 2017

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The species composition and seasonal abundance of aphids and their natural enemies were investigated in an apple orchard located in central Peloponnese. For that purpose shoots were collected at weekly intervals. The aphid species Aphis pomi De Geer (Hemiptera: Aphididae), Dysaphis plantaginea (Passerini) (Hemiptera: Aphididae) and Eriosoma lanigerum (Hausmann) (Hemiptera: Eriosomatidae) were recorded. In both years of the study, A. pomi developed higher populations than the other two species. The population of A. pomi was high in June and July. D. plantaginea was present in April and May, with high numbers mainly in May, whilst E. lanigerum was recorded in low numbers from May to July. The number of aphids was not found to differ significantly between samples collected from the northern and southern part of the trees. The species composition of aphid population on each sampled shoot, documented spatial segregation between A. pomi and D. plantaginea. It was proved that the eggs were more commonly laid near the buds of the central part of the twigs. The natural enemies found were predators belonging to the families of Coccinellidae, Chrysopidae, Syrphidae and Anthocoridae. Generally, their numbers were low.

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Section: Discussionsupporting

confidence: 76%

Section: Discussionmentioning

confidence: 99%

Temporal asynchrony, spatial segregation and seasonal abundance of aphids on apple trees

Perdikis

Lykouressis

Mitropoulou

et al. 2017

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“…albipuncta eggs are usually laid in group of 2-3 under apple leaves in New Hampshire. As for A. aphidimyza (Kozár et al, 1994;Stewart & Walde, 1997;Brown, 2004;Fréchette et al, 2008), their abundance is highly correlated with aphid density (Tracewski, 1983). In many systems Leucopis spp.…”

Section: Introductionmentioning

confidence: 99%

Leucopis annulipes larvae (Diptera: Chamaemyiidae) use a furtive predation strategy within aphid colonies

Fréchette¹,

Larouche²,

Lucas³

2008

Eur. J. Entomol.

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Abstract.A laboratory experiment was conducted to determine whether the predation strategy of larvae of the aphidophagous silver fly Leucopis annulipes Zetterstedt (Diptera: Chamaemyiidae) is furtive, as are larvae of the aphidophagous midge Aphidoletes aphidimyza Rondani (Diptera: Cecidomyiidae), or active like aphidophagous ladybird beetle larvae (Coleoptera: Coccinellidae). The impact of L. annulipes larvae on pea aphid, Acyrthosiphon pisum (Harris) (Hemiptera: Aphididae), colony disturbance was evaluated and compared with that of the furtive predator A. aphidimyza and the active-searching ladybird beetle Harmonia axyridis Pallas. Results indicate that aphids showed significantly fewer defensive acts (dropping, walking away, wriggling) in the presence of L. annulipes larvae than of ladybird beetle larvae. Furthermore, the impact of L. annulipes larvae on aphid colony disturbance was similar to that of A. aphidimyza and to a control treatment without predators. These results clearly indicate that L. annulipes larvae use a furtive predation strategy.

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“…Aphidoletes aphidimyza has several times been observed as the numerically dominant species of aphid predators in North American apple orchards (Haley & Hogue, 1990;Kozár et al, 1994;Stewart & Walde, 1997;Brown, 2004). According to Bouchard et al (1982), A. aphidimyza may be present in Quebec orchards from late May or early June.…”

Section: Discussionmentioning

confidence: 99%

“…In our experiment, however, A. aphidimyza larvae were abundant in mid-June 2006 and only from early to mid August 2005 when aphid populations peaked. Stewart & Walde (1997) suggested that A. aphidimyza could have a great impact on apple aphid colonies in northern climates (such as in Canada) due to the fact that it begins its activities while aphid colonies are still at low density. Our results suggest that even if A. aphidimyza adults are present early in the season, females will not lay eggs in aphid colonies until they reach high densities.…”

Section: Discussionmentioning

confidence: 99%

Apple aphid, Aphis spp. (Hemiptera: Aphididae), and predator populations in an apple orchard at the non-bearing stage: The impact of ground cover and cultivar

Fréchette¹,

Cormier²,

Chouinard³

et al. 2008

Eur. J. Entomol.

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Apple aphid, Aphis spp. (Hemiptera: Aphididae), and predator populations in an apple orchard at the non-bearing stage: The impact of ground cover and cultivar BRUNO Abstract.A two-year field experiment was conducted to determine whether a conservation biological control strategy could be applied to enhance the biological control of green apple aphids, Aphis spp., in a high-density and scab-resistant apple orchard at the non-bearing stage. The natural occurrence of aphid predators and their impact on aphid populations were evaluated in 2005. The impact of predation on aphid densities was evaluated by comparing a predator exclusion treatment with a control. In 2006, the possibility to enhance predator abundance/performance and aphid biological control with a flowering ground cover was tested: trees were grown either with a flowering ground cover of phacelia, Phacelia tanacetifolia Bentham, and buckwheat, Fagopyrum esculentum Moench, or with a conventional ground cover of mixed Poaceae species. In 2006, it was also determined whether aphid densities differ between Liberty and Topaz, 2 scab-resistant cultivars. Results indicate that the predatory arthropod community was dominated by Coccinellidae, Cecidomyiidae, and various spider species. The ladybird community was dominated by the exotic species Harmonia axyridis Pallas, and the abundance of this species was correlated with aphid density. Naturally occurring predators had little impact on aphid abundance, although the proportion of trees with aphid colonies was greater in the predator exclusion treatment on two consecutive dates in 2005. Ground cover types had no impact on aphid densities. The oviposition response of Cecidomyiidae to aphid density was greater in Liberty trees with flowering ground cover than with the conventional ground cover. Conversely, the response of ladybird adults to aphid density was more important in Topaz trees with the conventional ground cover than with the flowering ground cover. Finally, no difference occurred in aphid abundance between Liberty and Topaz trees. Those results are discussed from a biological control and ecological point of view.

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THE DYNAMICS OF APHIS POMI DE GEER (HOMOPTERA: APHIDIDAE) AND ITS PREDATOR, APHIDOLETES APHIDIMYZA (RONDANI) (DIPTERA: CECIDOMYIIDAE), ON APPLE IN NOVA SCOTIA

Cited by 20 publications

References 19 publications

Temporal asynchrony, spatial segregation and seasonal abundance of aphids on apple trees

Temporal asynchrony, spatial segregation and seasonal abundance of aphids on apple trees

Leucopis annulipes larvae (Diptera: Chamaemyiidae) use a furtive predation strategy within aphid colonies

Apple aphid, Aphis spp. (Hemiptera: Aphididae), and predator populations in an apple orchard at the non-bearing stage: The impact of ground cover and cultivar

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