Developing insecticide management for Insnesia glabrascuta (Caldwell) (Homoptera: Psyllidae) on young ifit trees on Guam

Publication Type:Journal Article
Year of Publication:2004
Authors:R. H. Miller
Journal:Micronesica
Volume:37
Issue:1
Pagination:37–48
ISSN:0026-279X
Keywords:avermectin, dimethoate, Insnesia glabrascuta, Intsia bijuga, mortality, pesticide, psyllid, spinosad, suppression, thiamethoxam
Abstract:

The effects of four pesticides on populations of the psyllid, Insnesia glabrascuta (Caldwell), were examined on ifit trees, Intsia bijuga (Colebr.) O. Kuntze. The pesticides tested were Cygon®, a commercial over-the-counter formulation of dimethoate; Avid®, a commercial formulation of avermectin; Actara®, a commercial formulation of thiamethoxam; and Conserve®, a commercial formulation of spinosad. All pesticides caused initial mortality to psyllids. However, psyllid populations rapidly rebounded to pre-treatment levels in the Cygon® spray and drench treatments, while densities remained below pre-treatment levels longest in the highest concentrations of Actara®, Conserve®, and Avid® spray treatments. Psyllid population suppression was probably linked to residual activity characteristic of the different compounds and to physiological changes in tree leaves induced by feeding psyllids.
Implications for the use of these pesticides for psylla management on ifit trees in Guam’s tropical insular environment are discussed.

URL:http://mangilao.uog.edu/up/micronesica/abstracts{\_}37/pdfs{\_}37/37-48{%}20Miller{%}2037(1).pdf
Taxonomic name: 
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith