Chigawo cha Marin chinali chopanda ziro chifukwa cha imfa yadzidzidzi ya thundu, choncho ndizoyenera kuti Marin atsogolere kuthetsa tizilombo toyambitsa matenda omwe amayambitsa matenda omwe awononga nkhalango za oak ku California ndi Oregon. Asayansi ku National Ornamental Research Site yazaka zitatu ku Dominican University ku San Rafael adavumbulutsa luso la "green" lomwe apanga pogwiritsa ntchito chowotcha wamba chamalonda kutenthetsa dothi mpaka madigiri 122, kupha tizilombo toyambitsa matenda a oak mwadzidzidzi. Pitirizani kuwerenga nkhaniyi Pano.
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