Exclusion of natural enemies as a tool in managing rare plant species

Article Abstract:

Natural enemies such as native insect herbivores can limit the survival, growth, and reproduction of threatened plant species like Pitcher's thistle. Insecticides are applied cautiously in a rigorous, controlled, and small-scale experiment. The chronic herbivory by coevolved insect herbivores limits the population density and fitness of the other species.

Pesticide and Other Agricultural Chemical Manufacturing, Vegetable Crop Insecticides, Usage, Influence, Growth, Phytophagous insects, Company growth, Pitcher plants, Crop insecticides

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Invasiveness of some biological control insects and adequacy of their ecological risk assessment and regulation

Article Abstract:

Biological control through the release of natural enemies carries unanticipated ecological risks. The ecological risks due to the deliberate introduction of weevil (Rhinocyllus conicus) and an adventitious weevil (Larinus planus) for the biological control of exotic thistles are reviewed.

United States, Venture Analysis, Risk assessment, Risk factors, Environmental aspects, Ecology, Weevils

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Protection from natural enemies in managing rare plant species

Article Abstract:

Protecting rare plants from their natural predators can enhance their ability to thrive. Protecting juvenile Pitcher's thistle from insects led to a 53% drop in juvenile plant mortality and a 10-fold increase in seed production.

Methods, Management, Plant conservation, Rare plants

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