Erythrina gall wasp, Quadrastichus erythrinae (Hymenoptera: Eulophidae) in Florida, and susceptibility of Erythrina herbacea (Fabaceae)

Forrest W. Howard, Robert R. Pemberton, Hong Liu

Abstract


Erythrina gall wasp (EGW), Quadrastichus erythrinae Kim, and the extent of its galling and associated damage to Erythrina spp. hosts were observed in a research nursery and in natural and landscaped areas in southern Florida. In the research nursery, galling and resultant damage to Erythrina herbacea L., a native plant, were highly variable on four dates during a 1-year period. On one examination date, when the susceptibility levels of three species of Erythrina were compared, there was a higher mean percentage of galled leaves on Erythrina variegata L. than on Erythrina herbacea, and minimal galling on Erythrina humeana Sprengel. Based on several criteria, E. variegata was the most susceptible of these hosts. Preliminary field observations on the behavior of EGW are reported. Erythrina amazonica Krukoff is reported as a new host of EGW.

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Proc. Fla. State Hort. Soc.     ISSN 0886-7283