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Erythrina gall wasp (Quadrastichus erythrinae)

Image Number: 26302A

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Caption:

Erythrina gall wasp (Quadrastichus erythrinae). Eulophid wasps (gall-forming wasps) insert / lay eggs into young tissue of certain types of trees. The Erythrina gall wasp lays eggs in to leaf and stem tissue of the Indian coral tree (Erythrina variegata and related species; also known as tigers claw and wiliwili-haole). The wasp larvae, which develop within the plant tissue, induce the formation of galls in leaflets, leaves, petioles and new shoots. Leaves curl and appear deformed while petioles and shoots become swollen. After feeding is complete, larvae pupate within the leaf and stem tissue. After pupation adult wasps emerge by cutting exit holes through to the outside. Heavily galled leaves and stems result in a loss of growth and in severe infestations can cause defoliation and death of the tree. Since its discovery on Oahu, Hawaii in April 2005, it has spread rapidly to the other islands of Hawaii.

Keywords:

| 26302A 03.01.07 insects gall wasp wasp plant pathogen plant disease Quadrastichus Hawaii Eulophidae insect Fabaceae coral tree Indian coral tree wiliwili wiliwili-haole wiliwili haole tiger's claw tigers claw Erythrina Erythrina variegata gall-forming gall-forming wasp gall forming gall forming wasp larva larvae plant pest pupa pupae wasp larvae defoliation leaf gall leaf galls petiole petiole gall petiole galls stem gall stem galls tree death agricultural pest agriculture pest plant infestation severe infestation pupate erythrina gall wasp Quadrastichus erythrinae SEM |

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