Mtundu wa polyphagous shot hole borer (SHB), Euwallacea sp.matenda a Fusarium, Fusarium euwallaceae, ndi tizilombo tatsopano: matenda owopsa omwe amayambitsa kuvulala ndi kufa kwa mitengo yambiri yamitengo yolimba komanso yokongola kum'mwera kwa California. Kachikumbu ka ambrosia kamakhala ndi mitundu yambiri ya mbalame ndipo imatha kukula mu >20 mitundu, kuphatikizapo mapeyala, Persea americana, tsamba lalikulu la mapulo, Acer macrophyllum, California box mkulu, acer negundo Pali. California, mkuyu waku California, Platanus racemosa, m'mphepete mwa nyanja, Quercus agrifolia, kastorbean, Common Mafunso, msondodzi wofiira, Salix laevigata, ndi white alder, Alnus rhombifolia.
US Forest Service Region 5 Forest Health Protection posachedwapa inapanga chikalata chosonyeza zizindikiro zovulaza zomwe SHB imapangidwira. Dinani apa kuti mutsitse chikalatacho.