Aphelinus Perpallidus Parasitism of Monellia Caryella Populations in Far West Texas1

Bueno, R.; Stone, Jay D.

doi:10.18474/0749-8004-20.3.325

Cited by 6 publications

(8 citation statements)

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“…Pecan aphids have many predators (Tedders, 1976 ;Edelson & Estes, 1981 ;Liao et al, 1984) but few parasites (Tedders, 1978 ;Watterson & Stone, 1982 ;Liao et al, 1984 ;Bueno & Stone, 1985). Liao et al (1984Liao et al ( , 1985 reported that aphid predators (chrysopids, spiders) play an important role in maintaining aphid populations at low levels.…”

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confidence: 99%

Seasonal abundance of the crapemyrtle aphid,Sarucallis kahawaluokalani, in relation to the pecan aphids,Monellia caryella andMonelliopsis pecanis and their common predators

Mizell

Schiffhauer

1987

Entomophaga

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The seasonal abundance of the crapemyrtle aphid, Sarucallis kahawaluokalani (Kirkaldy), and the majority of its predators that are common with the yellow pecan aphid, Monelliopsis pecanis Bissel, and the blackmargined aphid, Monellia caryella (Fitch), were determined in norh Florida. S. kahawaluokalani populations were tri -and bimodal in the 2 years studied and peak populations ofS. kahawaluokalani preceeded those of the pecan aphid complex. Peaks in predator populations consisting of Coccinellidae, Syrphidae, Chrysopidae and Anthocoridae, either coincided with or occurred just after S. kahawaluokalani peaks.The implications of the findings with respect to use ofS. kahawaluokalani as an alternate host of predators of pecan aphids and the potential for manipulation of the system to enhance biological control in pecan are discussed. The use of this system is advocated for augmentation and manipulation of generalist predators in other crop systems.

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confidence: 99%

Seasonal abundance of the crapemyrtle aphid,Sarucallis kahawaluokalani, in relation to the pecan aphids,Monellia caryella andMonelliopsis pecanis and their common predators

Mizell

Schiffhauer

1987

Entomophaga

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“…V iggiani (1984) reported that aphelinid wasps have high host‐searching ability. Therefore, although aphelinid have a moderate impact on their host aphids in the field (B ueno and S tone , 1985), they are an important biological control agent in greenhouses ( van L enteren et al., 1997). In addition, because both of virgin and mated females of A. gossypii showed similar biological performances, it is convenient using virgin females as a multiple‐releasing agent to control aphids.…”

Section: Discussionmentioning

confidence: 99%

Age‐specific survival and fecundity and their effects on the intrinsic rate of increase of Aphelinus gossypii (Hym., Aphelinidae), a parasitoid of Aphis gossypii (Hom., Aphididae)

Perng

Liu

2002

J Applied Entomology

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The age-specific survival and fecundity of female adults of the aphidophagous parasitoid, Aphelinus gossypii Timberlake (Hym., Aphelinidae), were determined at a host density of 50 Aphis gossypii Glover (Hom., Aphididae) per leaf of Ageratum houstonianum Mill each day at 25degreesC. The age-specific mummy production, emergence rate and sex ratio of progeny were calculated. The implication of these results in terms of potential population growth of A. gossypii and related species is discussed. The age-specific survival curve (l(x)) of females exhibited a Type I pattern, which resulted in little difference between Sigmam(x) and Sigmal(x) m(x). The l(x) curve of males exhibited a Type II pattern, and their survival time was much shorter than that of females. Each mated female produced on average 598.9 +/- 64.0 aphid mummies, and preyed on 87.9 +/- 6.2 aphids. Most of the biological performance parameters were not different significantly between mated and virgin females. The highly female-biased sex ratio of offspring produced by mated females soon after their emergence resulted in a high fecundity rate (m(x)) during the early reproductive period. Therefore, although the sex ratio of progeny was male-biased during the entire reproductive period, the intrinsic rate of increase estimated using age-specific sex ratios was larger than that estimated using a constant sex ratio of 0.5. These results indicate that the high survival and the adaptation of producing mostly female offspring during the early reproductive period contribute much to the population increase potential of this parasitoid

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“…Pecans, unlike other tree crops, host the season-long (and often concurrent) occurrence of 3 aphid species of economic concern: yellow pecan aphid, Monelliopsis pecanis Bissell, blackmargined aphid, Monellia caryella (Fitch), and black pecan aphid, Melanocallis caryaefoliae (Davis) (Hemiptera: Aphididae) ( Tedders 1978 , Cottrell et al 2009 , Paulsen et al 2013 ). Within the pecan orchard system, at least one primary parasitoid species, Aphelinus perpallidus Gahan (Hymenoptera: Aphelinidae), is known to specialize on the pecan aphid complex where it parasitizes M. pecanis , M. caryella , and, to a much lesser extent, M. caryaefoliae ( Bueno and Stone 1983 , 1985 ). Previous research also recognizes the occurrence of other aphid parasitoid and hyperparasitoid species in the pecan system ( Bueno and Stone 1983 , Slusher et al 2021 ), suggesting the existence of complex trophic links that remain unresolved by conventional rearing and observation.…”

Section: Introductionmentioning

confidence: 99%

A molecular approach to unravel trophic interactions between parasitoids and hyperparasitoids associated with pecan aphids

Slusher,

Cottrell,

Gariepy

et al. 2024

Journal of Insect Science

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Advances in molecular ecology can overcome many challenges in understanding host–parasitoid interactions. Genetic characterization of the key-players in systems helps to confirm species and identify trophic linkages essential for ecological service delivery by biological control agents; however, relatively few agroecosystems have been explored using this approach. Pecan production consists of a large tree perennial system containing an assortment of seasonal pests and natural enemies. As a first step to characterizing host–parasitoid associations in pecan food webs, we focus on aphid species and their parasitoids. Based on DNA barcoding of field-collected and reared specimens, we confirmed the presence of 3 species of aphid, one family of primary parasitoids, and 5 species of hyperparasitoids. By applying metabarcoding to field-collected aphid mummies, we were able to identify multiple species within each aphid mummy to unravel a complex food web of 3 aphids, 2 primary parasitoids, and upward of 8 hyperparasitoid species. The results of this study demonstrate that multiple hyperparasitoid species attack a single primary parasitoid of pecan aphids, which may have negative consequences for successful aphid biological control. Although further research is needed on a broader spatial scale, our results suggest multiple species exist in this system and may suggest a complex set of interactions between parasitoids, hyperparasitoids, and the 3 aphid species. This was the first time that many of these species have been characterized and demonstrates the application of novel approaches to analyze the aphid-parasitoid food webs in pecans and other tree crop systems.

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Aphelinus Perpallidus Parasitism of Monellia Caryella Populations in Far West Texas1

Cited by 6 publications

References 0 publications

Seasonal abundance of the crapemyrtle aphid,Sarucallis kahawaluokalani, in relation to the pecan aphids,Monellia caryella andMonelliopsis pecanis and their common predators

Seasonal abundance of the crapemyrtle aphid,Sarucallis kahawaluokalani, in relation to the pecan aphids,Monellia caryella andMonelliopsis pecanis and their common predators

Age‐specific survival and fecundity and their effects on the intrinsic rate of increase of Aphelinus gossypii (Hym., Aphelinidae), a parasitoid of Aphis gossypii (Hom., Aphididae)

A molecular approach to unravel trophic interactions between parasitoids and hyperparasitoids associated with pecan aphids

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