Temperature-sensitive
Guides
Boreioglycaspis
Boreioglycaspis is a genus of psyllids in the family Aphalaridae, containing species that specialize on Melaleuca and related Myrtaceae. The genus includes Boreioglycaspis melaleucae, introduced to Florida in 2002 as a classical biological control agent against the invasive tree Melaleuca quinquenervia. Species in this genus are characterized by their narrow host specificity and association with Australian native plants.
Myzocallis coryli
Hazel Aphid, Filbert Aphid
Myzocallis coryli, commonly known as the hazel aphid or filbert aphid, is a specialist phloem-feeding aphid that exclusively infests species of the genus Corylus (hazelnuts). Native to Europe, it has established populations in North America and was first recorded in Tasmania in 2019 as a recent introduction. The species is a significant agricultural pest in hazelnut orchards, particularly in Oregon and Turkey, where heavy infestations can stunt nut development and reduce commercial viability. Population dynamics are strongly temperature-dependent, with optimal development around 22°C and decline above 25°C.