Results 181 to 190 of about 7,606 (223)
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On optimal oviposition behavior in phytophagous insects
Theoretical Population Biology, 1978Abstract A model is developed that predicts when an insect should oviposit on a potential larval host plant when it is encountered. Optimal behavior depends upon the suitability of this plant for larval development and on the probability of finding a more suitable host in the available time.
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Plant Phenols Utilized as Nutrients by a Phytophagous Insect
Science, 1982Phenols are commonly regarded as feeding deterrents for phytophagous insects, but the tree locust Anacridium melanorhodon survives better and grows faster when certain phenols are added to a food plant that is relatively low in both protein and phenols. The phenols are at high concentration in the common host plants.
E A, Bernays, S, Woodhead
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Diversity and composition of phytophagous insect guilds on Brassicaceae
Oecologia, 1998We investigated the guild structure of phytophagous insects on Brassicaceae in Poland and the influence of host-plant parameters (e.g. sampling effort, geographical distribution, taxonomic isolation, nitrogen indicator values) on the species richness of these guilds. The data were extracted from a study published by Lipa et al.
M, Frenzel, R, Brandl
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Ecological Constraints on Female Fitness in a Phytophagous Insect
The American Naturalist, 2012Although understanding female reproduction is crucial for population demography, determining how and to what relative extent it is constrained by different ecological factors is complicated by difficulties in studying the links between individual behavior, life history, and fitness in nature.
David, Berger +4 more
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Mechanisms for regulating oxygen toxicity in phytophagous insects
Free Radical Biology and Medicine, 1990The antioxidant enzymatic defense of insects for the regulation of oxygen toxicity was investigated. Insect species examined were lepidopterous larvae of the cabbage looper (Trichoplusia ni), southern armyworm (Spodoptera eridania), and black swallowtail (Papilio polyxenes).
S, Ahmad, R S, Pardini
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PHYTOPHAGOUS INSECT–MICROBE MUTUALISMS AND ADAPTIVE EVOLUTIONARY DIVERSIFICATION
Evolution, 2008Adaptive diversification is a process intrinsically tied to species interactions. Yet, the influence of most types of interspecific interactions on adaptive evolutionary diversification remains poorly understood. In particular, the role of mutualistic interactions in shaping adaptive radiations has been largely unexplored, despite the ubiquity of ...
Janson, Eric M. +3 more
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Effects of hostplant age on phytophagous insects
Entomologia Experimentalis et Applicata, 1969In Colorado beetle females fed with physiologically aged potato leaves, an inhibition or even a standstill of reproduction occurs, followed by diapause.In such beetles, the volume of the corpora allata is reduced and the medial cerebral neurosecretory cells do not transport their neurosecretory material.
de Wilde, J. +2 more
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The Sympatric Origin of Phytophagous Insects
1997Global estimates of the number of insect species now range from 10 to 30 million and the tally keeps growing. This means that roughly 75–95% of all living eukaryotic organisms are insects. No matter which figure you care to choose, the numbers are impressively large.
Guy L. Bush, James J. Smith
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Phytophagous Insect Associations with Cucurbita in Illinois
Environmental Entomology, 1976Phytophagous insect associations with 5 cultivated and 14 mesophytic and xerophytic wild Cucurbita spp. were recorded for 4 consecutive years. Overwintering striped cucumber beetles, Acalymma vittata (Fab.) were most attracted to the young growth of the Maxima and Ficifolia groups and the wild xerophytic Digitata group.
W. L. Howe, A. M. Rhodes
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Adaptive genetic structure in phytophagous insect populations
Trends in Ecology & Evolution, 1996Genetic variation in insect populations is frequently structured into discrete groups, or demes, that form in response to stochastic forces or natural selection. Because host-plant populations are often highly heterogeneous, phytophagous insects may form demes that are adapted to the unique traits of individual plants. Recent field experiments indicate
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