Factors influencing the aggregative response of the blue willow beetle, <i>Phratora vulgatissima</i>

Peacock, Lori; Lewis, Mervyn J.; Herrick, S.

doi:10.1046/j.1570-7458.2001.00774.x

Cited by 21 publications

(18 citation statements)

References 12 publications

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“…There was also no evidence that beetles were choosing trees on the basis of leaf number, as there were very few associations between beetle damage and leaves per tree. Beetles may be responding to other factors, such as conspecifics or kairomones, as shown previously (Peacock, Lewis & Herrick 2001). This plant choice behaviour makes predictions of insect movement, especially in relation to configuration of genotypes within a plantation, very difficult.…”

Section: Discussionmentioning

confidence: 87%

Does host genotype diversity affect the distribution of insect and disease damage in willow cropping systems?

Peacock

Hunter

Turner

et al. 2001

Journal of Applied Ecology

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Summary1. Planting of willow genotype mixtures for biomass production has been suggested as a non-chemical strategy for pest management. Basic information on spatial dynamics of important insects and pathogens is necessary for the effective deployment of host genotypes in a plantation. In 1998 and 1999 the degree and spatial distribution of damage by Melampsora spp. and Phratora vulgatissima were studied concurrently in a field trial containing monocultures of willow Salix genotypes with different willow rust and beetle susceptibilities, and two design mixtures (random or regular) of three or five genotypes. 2. For both years, there was more rust and beetle damage on plants in monocultures than in mixtures. There were significant differences in the vertical distribution of beetle damage along stems between plantation designs for the 2 years, yet only in 1999 for rust. Rust severity along stems was significantly correlated between leaves, indicating localized spread of disease. In contrast, beetle damage severity along stems was weakly correlated between alternate leaves and leaves farther apart, suggesting beetle movement from tree to tree. 3. In 1998, spatial distribution of rust was aggregated in 67% of plots studied and in 40% for beetles. There was no significant difference in the distribution of beetle damage between planting design, but rust was aggregated in 75% of mixtures and 33% of monocultures. While beetle damage distribution was similar between years, rust was aggregated in all monoculture plots but in only 8% of mixtures in 1999. The difference between years and design for rust was probably because of the later stage of rust development in 1999 and the delaying effect of mixtures on this development. 4. In 1998, there were significant negative correlations between the extent of rust and beetle damage on individual trees. However, only 20% of plots showed a significant spatial dissociation between these two types of damage. There were fewer discernible interactions in 1999. 5. Plantation design provides the basis for integrated control of rust and beetle damage within willow cropping systems by delaying the spread and development of both organisms. Both pest and disease can be assessed successfully simultaneously under field conditions, a major saving in human resources. Initial selection of willow mixture configuration should primarily take into account the effects of spatial design on rust development.

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Section: Discussionmentioning

confidence: 87%

Does host genotype diversity affect the distribution of insect and disease damage in willow cropping systems?

Peacock

Hunter

Turner

et al. 2001

Journal of Applied Ecology

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“…Adults emerge in August, feed quickly, and find hibernation sites. Adults probably excrete pheromones that attract other individuals (Peacock et al 2001).…”

Section: Methodsmentioning

confidence: 99%

“…How this species evaluates occupancy is not fully understood. Herbivory combined with beetle presence attracts other adults, suggesting that plant volatiles and pheromones are involved (Peacock et al 2001), but other cues might also help determine occupancy (Fernandez andHilker 2007, Dicke andBaldwin 2010). Early eggs probably contributed more to the final number of eggs on a plant than later eggs because females probably laid fewer eggs as they encountered more eggs on a plant over the course of the experiment.…”

Section: Fig 1 (A)mentioning

confidence: 99%

How far away is the next basket of eggs? Spatial memory and perceived cues shape aggregation patterns in a leaf beetle

Stephan

Stenberg

Björkman

2015

Ecology

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Abstract. Gregarious organisms need to handle the trade-off between increasing food competition and the positive effects of group living, and this is particularly important for ovipositing females. We hypothesized that insect females consider how many conspecifics previously visited a host plant. In a no-choice assay, we show that the gregarious blue willow leaf beetle (Phratora vulgatissima) laid the most eggs and the largest clutches on plants where a sequence of few individual females was released, compared to plants where one or many different females were repeatedly released. Therefore, this species is more sensitive to the indirectly perceived number of conspecifics than the directly perceived number of eggs on a plant. We further hypothesized that females adjust their own intra-plant egg clutch distribution to that of conspecifics and discovered a new behavioral component, i.e., the modulation of distances between clutches. Females adjusted these distances in ways indicating the use of spatial memory, because the largest distance increases were observed on plants with their own clutches, compared to plants with clutches from conspecifics. However, adjustment of aggregation level and distance between clutches occurred only on a suitable, and not on an unsuitable, Salix genotype. We conclude that both behaviors should reduce competition between sibling and non-sibling larvae.

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“…It has already been reported that behavioral responses of arthropods to plant volatiles can be affected by gender and hunger levels (Landolt et al 1999;Shimoda and Dicke 2000;Peacock et al 2001). For example, olfactory responses of the predatory mite Phytoseiulus persimilis to odor from lima bean plants infested by their prey, Tetranychus urticae, depend on the hunger levels of the predatory mites (Sabelis and van de Baan 1983;Shimoda and Dicke 2000).…”

Section: Introductionmentioning

confidence: 99%

“…For example, olfactory responses of the predatory mite Phytoseiulus persimilis to odor from lima bean plants infested by their prey, Tetranychus urticae, depend on the hunger levels of the predatory mites (Sabelis and van de Baan 1983;Shimoda and Dicke 2000). Also, females, but not males, of chrysomelid leaf beetles, such as Phratora vulgatissima and Leptinotarsa decemlineata, are attracted to odor from plants infested by conspecifics (Landolt et al 1999;Peacock et al 2001). Thus, to test our hypothesis, we focused on hunger levels and gender of P. versicolora.…”

Section: Introductionmentioning

confidence: 99%

Do adult leaf beetles (Plagiodera versicolora) discriminate between odors from intact and leaf-beetle-infested willow shoots?

Yoneya

Kugimiya

Takabayashi

2009

Journal of Plant Interactions

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We investigated how adults of willow leaf beetle Plagiodera versicolora find shoots with new leaves that were suitable food resources for them by focusing on shoot odor. Female and male beetles (starved and satiated) preferred the odor from intact shoots of Salix eriocarpa to clean air. Starved females preferred odor from shoots with leaves infested by conspecifics to odor from intact shoots. However, satiated females as well as starved and satiated males showed no significant discrimination between the two odors. Pooling of the preference data revealed that starved individuals of females and males preferred odor from infested shoots to an extent that was significantly different from satiated individuals, while the distribution of starved and satiated females was not significantly different from that of males. These olfactory responses would provide an explanation for the host plant finding behavior of this specialist herbivore in the field.

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Factors influencing the aggregative response of the blue willow beetle, Phratora vulgatissima

Cited by 21 publications

References 12 publications

Does host genotype diversity affect the distribution of insect and disease damage in willow cropping systems?

Does host genotype diversity affect the distribution of insect and disease damage in willow cropping systems?

How far away is the next basket of eggs? Spatial memory and perceived cues shape aggregation patterns in a leaf beetle

Do adult leaf beetles (Plagiodera versicolora) discriminate between odors from intact and leaf-beetle-infested willow shoots?

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