Ko te whakangao poka pupuhi polyphagous (SHB), Euwallacea sp., me te mate o Fusarium, Fusarium euwallaceae, he pepeke hou: he uaua nga mate e whara ana, e mate ana te maha o nga rakau maariki me nga rakau whakapaipai i te tonga o California. He whanui te tini o te pokai namu ambrosia, a ka taea e ia te whakaoti te whanaketanga i roto i nga momo momo 20, tae atu ki te awhekātō, Persea Amerika, maple rau nui, Macrophyllum Acer, kaumatua pouaka California, Acer Negundo var. californicum, California hikamora, Platanus racemosa, takutai ora oki, Quercus agrifolia, castorbean, Ricinus communis, wirou whero, Salix laevigata, me te alder ma, Alnus rhombifolia.
US Forest Service Region 5 Forest Health Protection i hangaia he tuhinga e whakaatu ana i nga tohu whara i hangaia e te SHB. Paatohia a konei ki te tango i te tuhinga.