Xadhkaha goos gooska ee polyfagous (SHB), Euwallacea sp.iyo Fusarium ayaa dib u dhimanaya, Fusarium euwallaceae, waa cayayaan cusub: cudur kakan oo dhaawac iyo dhimasho u geysta geedo iyo geedo adag iyo geedo yaryar oo badan oo ku yaal koonfurta California. Beetle ambrosia waxay leedahay tiro badan oo martigelin ah waxayna dhamaystiri kartaa horumarinta> 20 nooc, oo ay ku jiraan avocado, Americana Persea, maple bigleaf, Acer macrophyllum, odayga sanduuqa California, acer negundo Waxaa. californicum, Sikamore California, Platanus racemosa, xeebta nool geed geed, Quercus agrifolia, castorbean, Risinus communis, safsaf cas, Salix laebigata, iyo alder cad, Alnus rhombifolia.
Gobolka Adeegga Kaymaha 5 Ilaalinta Caafimaadka Kaymaha ayaa dhawaan abuurtay dukumeenti muujinaya calaamadaha dhaawaca uu sameeyay SHB. Riix halkan si aad u soo dejiso dukumeentiga.