Leaf Pubescence Affects Distribution and Abundance of Generalist Slug Caterpillars (Lepidoptera: Limacodidae)

Lill, John T.; Marquis, Robert J.; Corff, Josiane Le; Holmberg, Nels; Barber, Nicholas A.

doi:10.1603/0046-225x-35.3.797

Cited by 38 publications

(30 citation statements)

References 51 publications

(54 reference statements)

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“…This is consistent with the Þndings of Young andSmith (1980), Pé rez-Estrada et al (2000), McGuire and Agrawal (2005), but contradicts those of Lill et al (2006). In the current study, the inhibitory effect of trichomes on feeding by C. hybrida is shown by the signiÞcant increase of beetle feeding after trichome removal in the three Solanum species (S. lichtensteinii, S. melongena, and S. mauritianum).…”

Section: Discussionsupporting

confidence: 92%

“…Less attention has been given to morphological traits such as trichome density, and results often were not deÞnitive (Bentz 2003, Guerra et al 2010. Some studies indicated a reduction in leaf trichome density under shade conditions (Young and Smith 1980, Pé rez-Estrada et al 2000, McGuire and Agrawal 2005, Diaz et al 2011, whereas others found an increase in density (Lill et al 2006). Furthermore, the effect of trichomes on herbivores may be positive, negative, or nonexistent depending on the plant or herbivore species (Southwood 1986, Moran 1986.…”

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confidence: 99%

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Abiotically-Induced Plant Morphological Changes and Host-Range Expansion in Quarantine Evaluations of Candidate Weed Biocontrol Agents: The Case StudyConchyloctenia hybrida(Coleoptera: Chrysomelidae)

et al. 2014

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Plant morphological changes mediated by growth conditions are linked to changes in host preference of herbivores. Understanding how these morphological changes inßuence herbivore feeding is critical in the interpretation of results of host evaluation of candidate weed biocontrol agents in quarantine and improvement of the evaluation system. We determined the effect of plant growth conditions on leaf trichomes and host choice of Conchyloctenia hybrida Boheman, an insect adapted to the removal of trichomes before feeding. The study included four Solanum species: Solanum lichtensteinii Willdenow (natural host of C. hybrida), Solanum mauritianum Scopoli, Solanum melongena L., and Solanum tuberosum L.. Plants were grown in either full sun, shade, a glasshouse, or in a growth-chamber. Plants grown in full sun had a higher leaf trichome density than those in shade or controlled environments. S. mauritianum had the highest trichome density and thickness of trichome layer. In a multiple-choice test using excised leaves, feeding by C. hybrida was higher on Solanum plants grown in the controlled environment as compared with full sun. Trichome removal from leaf surfaces of plants grown in full sun, using adhesive tape, was effective for S. lichtensteinii, S. mauritianum, and S. melongena, but not S. tuberosum. Leaf consumption by C. hybrida increased signiÞcantly where manual trichome removal using adhesive tape was effective. Structurally, leaves of S. tuberosum have simple trichomes with basal cells sunken into the mesophyll tissue. When using forceps to remove trichomes of S. tuberosum, mesophyll and vascular tissue remained attached to the trichomes. Generally, the type, density, and mat-thickness of leaf trichomes determined feeding by C. hybrida, but varied with plant species and growth conditions.

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Section: Discussionsupporting

confidence: 92%

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confidence: 99%

Abiotically-Induced Plant Morphological Changes and Host-Range Expansion in Quarantine Evaluations of Candidate Weed Biocontrol Agents: The Case StudyConchyloctenia hybrida(Coleoptera: Chrysomelidae)

et al. 2014

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“…In addition, plants may undergo significant changes in leaf nutrient content and defensive chemistry during leaf senescence ( Lee et al , 2003;Milla et al , 2004 ), affecting late season feeding species. For example, some temperate Lepidoptera, such as most Limacodidae and many Notodontidae, feed late in the growing season when the quality of foliage is low ( Wagner, 2005;Lill et al , 2006 ). Insects adapted to exploit these lowquality leaves may show similarly large population fluctuations as spring-feeding species if their development is mistimed relative to autumnal leaf abscission ( Waddell et al , 2001 ).…”

Section: Introductionmentioning

confidence: 99%

Timing is everything? Phenological synchrony and population variability in leaf‐chewing herbivores of Quercus

Forkner

Marquis

Lill

et al. 2008

Ecological Entomology

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Specialization on ephemeral resources (e.g. new leaves) should produce large annual variation in herbivore population size when the timing of availability of those resources is unpredictable. Despite considerable evidence for impacts of synchrony with budburst on survival of larval Lepidoptera, previous studies of adult Geometridae and Noctuidae found no correlations between insect phenology and population variability.2.# We surveyed larval Lepidoptera feeding on Quercus alba and Q. velutina in Missouri from 1993 to 2003 and examined population variability, measured as the coefficient of variation of population density (CV), in a subset of abundant species. We compared CV values among species whose larvae feed only in spring, early summer, mid-summer, late summer, or all season. We predicted that univoltine species whose larvae eclose and complete development in spring during leaf expansion would have higher variability than species feeding later in the season, having multiple generations, or having longer development times.3.#As predicted and consistent with hypotheses, spring-feeding species had CV values 32% higher than species feeding in summer months. Coefficients of variation were also 34% higher in leaf-rolling and mining guilds compared with free-feeders, suggesting that mobile species may compensate for asynchrony with budburst by dispersing to higher quality plants or plant parts. Multivoltine species, however, did not differ from univoltine species in population variability.4.#Our results suggest that asynchrony with plant phenology and factors that might exacerbate it, such as climate change, will have the largest impacts on the dynamics of spring-feeding Lepidoptera, particularly species with limited mobility

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“…For example, plants that use ants as defense can have reduced leaf pubescence, presumably to facilitate ant movement (Davidson et al 1989). In the absence of ants, however, pubescence may serve as a mechanical defense against herbivores (Schoener 1988;Lill et al 2006). An implicit assumption is that some or all of these traits are costly.…”

Section: Introductionmentioning

confidence: 99%

Population variation in plant traits associated with ant attraction and herbivory in Chamaecrista fasciculata (Fabaceae)

2008

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The benefits of ant-plant-herbivore interactions for the plant depend on the abundance of ants and herbivores and the selective pressures these arthropods exert. In plants bearing extrafloral nectaries (EFN), different mean trait values may be selected for by different populations in response to local herbivore pressure, ultimately resulting in the evolution of differences in plant traits that attract ants as defensive agents against herbivory. To determine if variation in traits that mediate ant-plant interactions reflect herbivore selective pressures, we quantified intra- and inter-population variation in plant traits for eight populations of the EFN-bearing annual Chamaecrista fasciculata (Michx.) (Fabaceae). Censuses in rural and urban areas of Missouri and Illinois (USA) showed population differences in ant attendance and herbivore pressure. Seeds were collected from each population, and plants were grown in a common greenhouse environment to measure sugar production, nectar volume and composition, EFN size and time of emergence, leaf pubescence, and leaf quality throughout plant development. Populations varied mainly in terms of nectary size, sugar production, and nectar volume, but to a lesser degree in leaf pubescence. Populations of C. fasciculata within urban areas (low in insect abundance) had small nectaries and the lowest nectar production. There was a positive correlation across populations between herbivore density and leaf damage by those herbivores on the one hand and sugar production and nectar volume on the other. These results, in conjunction with lack of evidence for maternally based environmental effects, suggest that population differences in herbivore damage have promoted differential evolution of EFN-related traits among populations.

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Leaf Pubescence Affects Distribution and Abundance of Generalist Slug Caterpillars (Lepidoptera: Limacodidae)

Cited by 38 publications

References 51 publications

Abiotically-Induced Plant Morphological Changes and Host-Range Expansion in Quarantine Evaluations of Candidate Weed Biocontrol Agents: The Case StudyConchyloctenia hybrida(Coleoptera: Chrysomelidae)

Abiotically-Induced Plant Morphological Changes and Host-Range Expansion in Quarantine Evaluations of Candidate Weed Biocontrol Agents: The Case StudyConchyloctenia hybrida(Coleoptera: Chrysomelidae)

Timing is everything? Phenological synchrony and population variability in leaf‐chewing herbivores of Quercus

Population variation in plant traits associated with ant attraction and herbivory in Chamaecrista fasciculata (Fabaceae)

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