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16 results for “phytophagous insect”
Рис. 1. КоΛичество макрокониΑий грибов роΑа Fusarium (% от общего чисΛа эΛементов морфоΛогии) на органах и в физиоΛогических жиΑкостях картофеΛьной коровки Fig. 1. Number of macroconidia of fungus species from the genus Fusarium (% of the total number of morphological elements) on organs and in physiological fluids of the potato ladybird beetle in On the vector characteristics of the potato ladybird beetle Henosepilachna Vigintioctomaculata (Motsch.) (Coleoptera, Coccinellidae) in the system "phytophagous insect - plant pathogen - plant"
Рис. 1. КоΛичество макрокониΑий грибов роΑа Fusarium (% от общего чисΛа эΛементов морфоΛогии) на органах и в физиоΛогических жиΑкостях картофеΛьной коровки Fig. 1. Number of macroconidia of fungus species from the genus Fusarium (% of the total number of morphological elements) on organs and in physiological fluids of the potato ladybird beetle
Examining the potential effects of phytophagous insect frass on forest nitrogen cycling at the Coweeta Hydrologic Laboratory from 1999 to 2001
Human alteration of the global nitrogen cycle has increased the importance of understanding the major sources, sinks, and fluxes of the cycle within natural ecosystems. One poorly understood component of the nitrogen cycle in forest ecosystems is the contribution of phytophagous insect frass on soil N-cycling dynamics. This study proposes to investigate the influence of frass on (1) the dynamics of soil N-cycling; (2) the loss of N from the ecosystem via leaching; (3) the slow cycle decomposition of post-herbivore leaf litter; and (4) the overall potential of soil near the Coweeta Hydrologic Laboratory to retain nitrogen. Red Oak (Quercus rubra [Fagaceae]) saplings will be subjected to defoliation by the seasonal phytophagous insect larvae of the White-Marked Tussock Moth (Orgyia leucostigma [Lepidoptera: Lymantriidae]) and the frass added to the soil in a factorial, controlled experimental design. Soil nutrient concentrations, leachate nutrient concentrations, "soil" respiration, and leaf quality will be measured. The project is expected to increase our understanding of the complex relationship between above-ground and below-ground nitrogen cycling dynamics as well as inform the current debate concerning the relative impacts and importance of human versus natural alterations to the nitrogen cycle.
Hectares of Alaskan Forested Ecosystems Infested by Phytophagous and Phloeophagus Insects, 1955-2008
This dataset reports hectares of Alaskan Forested Ecosystems Infested by Phytophagous and Phloeophagus Insects (including various beetles, budworms, moths, sawflies, and leaf miners), collected from 1955 to 2008.
Using semiochemicals to predict biotic resistance and facilitation of invading phytophagous insects
<p>Invasive species are leading causes of biodiversity loss and economic damage. Allocating limited resources towards prevention and management of invasions requires risk assessments based on ecological knowledge for species of potential concern. Interactions of potentially invasive species with heterospecifics in a novel community will contribute to biotic resistance and facilitation experienced by the invader, and thus the likelihood of establishment. To experimentally predict heterospecific interactions, we conducted field experiments using synthetic aggregation-pheromone lures to measure the response of ecologically relevant species (possible predators, competitors, and facilitators) to the simulated presence of two potentially invasive spruce bark beetles, the North American <em>Dendroctonus rufipennis</em> (tested in Norway) and the European <em>Ips typographus</em> (tested in eastern Canada). The Canadian beetle community responded strongly to <em>I. typographus</em> lures, suggesting potential for considerable biotic resistance, whereas <em>D. rufipennis</em> lures prompted little response by the Norwegian beetle community. <em>D. rufipennis</em> was attracted to <em>I. typographus </em>lures, suggesting potential facilitation between these species through cooperative mass attack on trees. Our findings will inform invasive-species risk assessments for <em>I. typographus</em> and <em>D. rufipennis</em> and highlight useful methods for assessing interactions among other taxa that rely heavily on semiochemical communication.</p>
FIGURE 2 in Kalanchoe ×sogae (Crassulaceae subfam. Kalanchooideae) derived from Kalanchoe lateritia × K. sexangularis, with notes on the inheritance of hairiness and resistance against phytophagous insects in Kalanchoe hybrids
FIGURE 2. Kalanchoe ×sogae. A. At flowering maturity plants of this shrubby nothospecies reach a height 0.5–1.0 m. B. Leaves are puberulous and mid-green to most often distinctly red or strongly crimson red-infused. C. Apart from being intensely reddish-infused, virtually all the plant parts are puberulous. In bud, the flowers are bright orange-red apically. Flowers are borne erectly to slanted sideways—never pendent. Excepting the adaxial surface of the corolla lobes, the flowers, too, are conspicuously puberulous throughout. D. Especially the basal swollen part of the corolla tube is light green and distinctly 4-angled-fluted. E. Flowers, here in lateral view, of K. ×sogae (centre) are intermediate between those of K. lateritia (left, one of the parents of K. ×sogae) and K. sexangularis (right, the other parent of K. ×sogae); rounded when viewed from below; gradually narrowly cylindrical above; and with the angles distinctly and strongly orange-infused to yield a green-orange-striped appearance. F. Corolla lobes of K. ×sogae (centre) are bright yellow to strongly bright orange-infused, rather similar to those of K. lateritia (left) but differs from the bright yellow, faintly brown-tipped ones of K. sexangularis (right). All photographs taken by Gideon F. Smith.
FIGURE 1 in Kalanchoe ×sogae (Crassulaceae subfam. Kalanchooideae) derived from Kalanchoe lateritia × K. sexangularis, with notes on the inheritance of hairiness and resistance against phytophagous insects in Kalanchoe hybrids
FIGURE 1. Kalanchoe lateritia (A–B) and K. sexangularis (C–D), the parents of K. ×sogae (see Fig. 2). A. Leaves of K. lateritia are pubescent and light green to yellowish or brownish green. B. Flowers of K. lateritia have bright yellow to strongly bright orange-infused corolla lobes. C. Leaves of K. sexangularis turn a bright crimson red when exposed to high levels of solar irradiation. D. Flowers of K. sexangularis have a greenish yellow corolla tube and generally bright yellow corolla lobes that could be faintly brown-tipped. All photographs taken by Gideon F. Smith.
FIGURE 3. A in Kalanchoe ×sogae (Crassulaceae subfam. Kalanchooideae) derived from Kalanchoe lateritia × K. sexangularis, with notes on the inheritance of hairiness and resistance against phytophagous insects in Kalanchoe hybrids
FIGURE 3. A. The indigenous South African weevil Sternuchopsis sedi (Coleoptera: Curculionidae: Molytinae: Mecysolobini) on a leaf of K. sexangularis. The weevil is 7 mm long. B. The weevil deposits its eggs in the stems of kalanchoes where the hatched larvae feed on the internal tissues, usually leaving only a hollowed out and very much weakened tube that will easily snap off. Both photographs taken by Gideon F. Smith.
Data from: Phytophagous insect oviposition shifts in response to probability of flower abortion owing to the presence of basal fruits
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Data from: Specialization and generalization in the diversification of phytophagous insects: tests of the musical chairs and oscillation hypotheses
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Data from: Phytophagous insects on native and non-native host plants: combining the community approach and the biogeographical approach
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Data from: Defensive symbionts mediate species coexistence in phytophagous insects
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Using semiochemicals to predict biotic resistance and facilitation of invading phytophagous insects
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Data from: Female fecundity variation affects reproducibility of experiments on host plant preference and acceptance in a phytophagous insect
Reproducibility is a scientific cornerstone. Many recent studies, however, describe a reproducibility crisis and call for assessments of reproducibility across scientific domains. Here, we explore the reproducibility of a classic ecological experiment—that of assessing female host plant preference and acceptance in phytophagous insects, a group in which host specialization is a key driver of diversification. We exposed multiple cohorts of Pieris napi butterflies from the same population to traditional host acceptance and preference tests on three Brassicaceae host species. Whereas the host plant rank order was highly reproducible, the propensity to oviposit on low-ranked hosts varied significantly even among cohorts exposed to similar conditions. Much variation could be attributed to among-cohort variation in female fecundity, a trait strongly correlated both to female size and to the size of the nuptial gift a female receives during mating. Small males provide small spermatophores, and in our experiment small females that mated with small males had a disproportionally low propensity to oviposit on low-ranked hosts. Hence, our results provide empirical support to the theoretical prediction that female host utilization is strongly affected by non-genetic, environmental variation, and that such variation can affect the reproducibility of ecological experiments even under seemingly identical conditions.
A soil fungus confers plant resistance against a phytophagous insect by disrupting the symbiotic role of its gut microbiota
<p>Dataset related to the manuscript titled "A hidden interkingdom competition underlies plant-insect interactions".</p> <p>Please, read the README.txt file for more info about zipped data content. </p>
Data from: Ecological constraints on female fitness in a phytophagous insect
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Data from: Female fecundity variation affects reproducibility of experiments on host plant preference and acceptance in a phytophagous insect
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