Uncaged larvae elicit a combination of local and integrated growth responses within mountain birch crown

Article Abstract:

Various experimental trees are subjected to long-lasting defoliation by uncaged insect larvae study the herbivore-elicited changes in the growth of the branching hierarchy within the crowns of mountain birch at all the levels. The results show that the source-sink interactions highly affect the control of resource allocation within a larger scale, as a plant's responses to localized herbivory involves both localized, as well as integrated components.

Physiological aspects, Defoliation

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Sources of variability in plant resistance against insects: free caterpillars show strongest effects

Article Abstract:

Research on the effects of Epirrita autumnata caterpillar larvae on Betula pubescens mountain birch is presented, contrasting laboratory and caged tests with uncaged tests. The disappearance rate of uncaged larvae was correlated with young age of stems and previous defoliation. In general, isappearance rate changes were larger than consumption and growth rate changes.

Statistical Data Included, Plants, Insect-plant relationships, Caterpillars, Plant hardiness

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Crowding-induced responses in a geometrid moth revisited: a field experiment

Article Abstract:

The specific nature of crowding effects of Epirrita autumnata in the field is investigated. The magnitude, density threshold and adaptiveness of the responses for crowded larvae are examined.

Science & research, Research, Study and teaching, Animal life cycles, Larvae

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