Host Location by Apterous Aphids After Escape Dropping from the Plant

Gish, Moshe; Inbar, Moshe

doi:10.1007/s10905-005-9009-9

Cited by 50 publications

(37 citation statements)

References 18 publications

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“…temperature increase). Dropping off means that the aphids have to endure food deprivation and spend energy relocating within the host plant (Gish and Inbar, 2006;Nelson et al, 2004;Nelson, 2007). Therefore, when encountering high temperatures, the aphids may face a trade-off between potential heat stress and energy consumption.…”

Section: Do the Aphids Drop Off Host Plants To Avoid Heat Stress?mentioning

confidence: 99%

“…This is likely related to the low mobility of nymphs. The dropping nymphs may spend more time and energy relocating within host plant than adults because of their slower walking speed (Gish and Inbar, 2006). Therefore, nymphs may endure higher heat stress risk to avoiding energy loss.…”

Section: Effects Of Short-term Temperature Acclimation and Starvationmentioning

confidence: 99%

“…Therefore, nymphs may endure higher heat stress risk to avoiding energy loss. The proportion of nymphal aphids of A. pisum and Uroleucon sonchi dropping their host plant is lower than that of adults (Chau and Mackauer, 1997;Gish and Inbar, 2006), also indicating that nymphs are likely to endure higher environmental risk (predation) to reduce the potential physiological risk (energy loss).…”

Section: Effects Of Short-term Temperature Acclimation and Starvationmentioning

confidence: 99%

“…Previous studies have shown that aphid dropping behavior is mainly a response to the presence of predators (Brodsky and Barlow, 1986;Francke et al, 2008;Losey and Denno, 1998;Myers, 1979), parasitoids (McAllister andRoitberg, 1987;Villagra et al, 2002) and herbivorous mammals (Gish et al, 2010(Gish et al, , 2011. In addition, dropping behavior differs between aphids species (Niku, 1975), varies among developmental stages (Chau and Mackauer, 1997;Gish and Inbar, 2006), and is affected by body colour (Braendle and Weisser, 2001), predation type (Day et al, 2006) and host nutrition (Villagra et al, 2002). All of these studies have been linked to dropping off behavior as a way of minimizing predation risk Gish et al, 2011;Nelson et al, 2004;Stacey and Fellowes, 2002) and the importance of dropping off as a response to high temperatures has largely been ignored.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Climate warming may increase aphids’ dropping probabilities in response to high temperatures

2012

Journal of Insect Physiology

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Section: Do the Aphids Drop Off Host Plants To Avoid Heat Stress?mentioning

confidence: 99%

Section: Effects Of Short-term Temperature Acclimation and Starvationmentioning

confidence: 99%

Section: Effects Of Short-term Temperature Acclimation and Starvationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Climate warming may increase aphids’ dropping probabilities in response to high temperatures

2012

Journal of Insect Physiology

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“…The parasitoid-induced movements resulting from the aphid escape response are small-scale ''vegetative'' movements rather than true migration and are generally restricted to the vicinity of the source plant (Jeger 1999;Reynolds et al 2006). In a field situation, the time taken by viruliferous aphids to find a new (uninfected) host plant, and their exposure to epigeal arthropod predators whilst on the ground, would also impact on the rate of disease proliferation (Losey and Denno 1998b, c;Gish and Inbar 2006;Grez et al 2007). If a biocontrol agent of an insect pest/vector is included in epidemiological models it would generally be assumed to reduce numbers of the target vector species and consequently decrease the incidence of disease.…”

Section: Synopsis: Complex Interactions and Consequences For Epidemiomentioning

confidence: 99%

Complex interactions between a plant pathogen and insect parasitoid via the shared vector-host: consequences for host plant infection

Hodge

Powell

2008

Oecologia

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Plant viruses modify the development of their aphid vectors by inducing physiological changes in the shared host plant. The performance of hymenopterous parasitoids exploiting these aphids can also be modified by the presence of the plant pathogen. We used laboratory and glasshouse microcosms containing beans (Vicia faba) as the host plant to examine the interactions between a plant virus (pea enation mosaic virus; PEMV) and a hymenopterous parasitoid (Aphidius ervi) that share the aphid vector/host Acyrthosiphon pisum. Neither PEMV-infection of V. faba, nor the carriage of PEMV virions by A. pisum, affected the growth or morphology of the aphid, or the oviposition behaviour and development of A. ervi. The presence of developing Aphidius ervi larvae within Acyrthosiphon pisum did not affect the ability of the aphids to transmit PEMV. However, by reducing their longevity, parasitism ultimately decreased the time viruliferous aphids were able to inoculate plants. In terms of virus dispersal, parasitized aphids exhibited more movement around experimental arenas than unparasitized controls, causing a slight increase in the proportion of beans infected with PEMV. Exposure to adult Aphidius ervi caused Acyrthosiphon pisum to rapidly drop off bean plants and disperse to new hosts, resulting in considerably higher plant infection rates (70%) than that seen in control arenas (25%). The results of this investigation demonstrate that when parasitoids are added to a plant-pathogen-vector system, benefits to the host plant due to reduced herbivore infestation must be balanced against the consequences of parasitoid-induced aphid dispersal and a subsequent increase in the level of plant infection.

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Rh6 gene modulates the visual mechanism of host utilization in fruit fly Bactrocera minax

Wang

Andongma

Dong

et al. 2018

Pest Management Science

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BACKGROUND Vision plays a critical role in host location and oviposition behavior for herbivorous insects. However, the molecular mechanisms underlying visual regulation in host recognition and oviposition site selection in insects remains unknown. The aim of this study was to explore the key visual genes that are linked to the host plant location of the fruit fly, Bactrocera minax. RESULTS Using a host specialist fruit fly, B. minax, which lays eggs only into immature green citrus fruit, we undertook behavioral, transcriptomic, and RNAi research to identify the molecular basis for host fruit color recognition. In laboratory and field assays we found that adults prefer green over other colors, and this preference is significantly increased in sexually mature over immature flies. Furthermore, we identified that the Rh6 gene, responsible for green spectral sensitivity, has elevated expression in mature flies over immature flies. RNAi suppression of Rh6 eliminated the preference for green, resulting in a significant decrease in the number of eggs laid by B. minax in green unripe citrus. CONCLUSION These results show that the Rh6 gene modulates the visual mechanism of host utilization in B. minax, providing a genetic basis for visual host location in a non‐model insect herbivore. © 2018 Society of Chemical Industry

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Host Location by Apterous Aphids After Escape Dropping from the Plant

Cited by 50 publications

References 18 publications

Climate warming may increase aphids’ dropping probabilities in response to high temperatures

Climate warming may increase aphids’ dropping probabilities in response to high temperatures

Complex interactions between a plant pathogen and insect parasitoid via the shared vector-host: consequences for host plant infection

Rh6 gene modulates the visual mechanism of host utilization in fruit fly Bactrocera minax

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