Authors: REIMER, NEIL J.; BEARDSLEY, J. W.

Source: Environmental Entomology, Volume 18, Number 6, December 1989 , pp. 1141-1146(6)

Publisher: Entomological Society of America

Abstract:

The effectiveness of Liothrips urichi Karny introduced to control the noxious weed Clidemia hirta (L.) D. Don was studied at three sites on Oahu, Hawaii. Vegetative C. hirta infested with L. urichi showed greater mortality after 1 mo and significantly shorter internode diameters among the survivors at 4 mo than uninfested plants. L. urichi had no effect on plant height in the field but stunted the growth of young potted C. hirta in greenhouse studies and caused a significant increase in terminal leaf drop. No effect on production of floral buds, flowers, or berries occurred at any field site over 11 mo. L. urichi was restricted to sunny or partly sunny sites and never occurred in heavily shaded areas. Higher thrips infestations occurred during the fall and winter and lower infestations during the summer. Percentage of damaged tips also fluctuated seasonally, but the degree of damage to individual leaves was not seasonal.

Document Type: Research article

Publication date: 1989-12-01

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• Environmental Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes reports on the interaction of insects with the biological, chemical, and physical aspects of their environment and is divided into the following sections: physiological ecology; chemical ecology; population ecology; quantitative ecology; community and ecosystem ecology; biological control­-parasitoids and predators; biological control--microbials; biological control--weeds; behavior; pest management; sampling; plant-insect interactions; molecular ecology and evolution; transgenic plants and insects. In addition to research papers, Environmental Entomology publishes Letters to the Editor, interpretive articles in a Forum section, and Book Reviews.
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