Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Effect of γ-irradiation treatment on development and reproduction of erythrina gall wasp, Quadrastichus erythrinae Kim (Hymenoptera:Eulophidae).

Abstract

The erythrina gall wasp, Quadrastichus erythrinae, a new invasive important quarantine pest, has been reported to damage Erythrina spp. seriously. To find out the method of quarantine treatment, the effects of the development and reproduction of erythrina gall wasp with γ-irradiation treatment were studied. The wasps were treated for 20 minutes with 0.05, 0.1, 0.2, 0.3 and 0.4 kGy γ-irradiation. The results showed that the percentage of pupation and emergence were reduced notably. The adult longevity was shortened. Their mating times and fecundity were decreased with the dosage increase. The wasps crawling out of emergence holes were notably decreased with the increasing dosage. The percentage of mortality of male was higher than that of the female with same dosage of γ-irradiation treatment. The sex ratio was interrelated with the treatment dosage.