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Guides

• Hoplocampa testudinea

  apple sawfly, European apple sawfly

  Hoplocampa testudinea is a sawfly species in the family Tenthredinidae that is a significant pest of apple orchards. Native to Europe, it was accidentally introduced to North America in 1939 and has since become invasive across the northeastern United States and Canada. The larvae develop inside developing apple fruitlets, causing characteristic ribbon scars or fruit drop, while adults are active during apple bloom and oviposit into the calyx of flowers.

  pestinvasiveagricultureorchardbiological-controldiapauseHymenopteraTenthredinidaeMalusapple-productionparasitoid-interactions