-Ndị Associated Press
Edepụtara: 10 / 4 / 2010
Mahadum California, ndị ọkà mmụta sayensị Berkeley na-achọ enyemaka ọha na eze n'ịchọpụta ọrịa na-egbu osisi oak.
N'ime afọ abụọ gara aga, ndị ọkà mmụta sayensị na-atụ aro ka ndị bi na ha na-anakọta ihe atụ osisi ma ziga ha na ụlọ nyocha nke Forest Pathology na Mycology Laboratory. Ha ejirila ozi ahụ mepụta maapụ na-akpa nkata mgbasa nke ọnwụ osisi oak na mberede.
Achọpụtara pathogen dị omimi na Mill Valley na 1995 wee gbuo ọtụtụ iri puku osisi na ugwu California na ndịda Oregon. Ndị ọkà mmụta sayensị na-eme atụmatụ na ọrịa a, nke a na-ebute site na osisi na mmiri, nwere ike igbu ihe ruru pasenti 90 nke osisi oak na osisi ojii dị na California n'ime afọ 25.
Ọrụ nke eserese ahụ, nke ndị ọrụ US Forest Service kwadoro, bụ mbọ mbụ dabere na obodo iji luso ọnwụ osisi oak ọgụ na mberede. O nwere ihe dị ka ndị sonyere 240 na-anakọta ihe karịrị 1,000 sample n'afọ gara aga, Matteo Garbelotto, onye UC Berkeley na-ahụ maka ọrịa anụ ọhịa na onye ọkachamara kachasị na mba ahụ na ọnwụ osisi oak na mberede.
"Nke a bụ akụkụ nke ngwọta," Garbelotto gwara San Francisco Chronicle. "Ọ bụrụ na anyị kụziere ma tinye aka na ndị nwe ụlọ, anyị nwere ike ime nnukwu mgbanwe."
Ozugbo achọpụtara ebe a na-emebi emebi, ndị nwe ụlọ nwere ike wepụ osisi ndị ọbịa, nke nwere ike ịbawanye ọnụọgụ ndụ osisi oak fọrọ nke nta ka ọ bụrụ okpukpu iri. A na-adụkwa ndị bi ebe ahụ ọdụ ka ha ghara ịrụ nnukwu ọrụ nke nwere ike imebi ala na osisi n'oge mmiri ozuzo n'ihi na ọ nwere ike inye aka gbasaa ọrịa ahụ.
Garbelotto kwuru, "Ogbe ọ bụla matara na ha nwere ọnwụ osisi oak na mberede na mpaghara ha kwesịrị ịsị, 'Hey a ga m eme ihe,' n'ihi na mgbe ị chọpụtara na osisi ndị ahụ na-anwụ, ọ dịla anya," Garbelotto kwuru.
Pịa ebe a maka nkọwa zuru ezu na mbọ Berkeley iji soro Ọnwụ Oak mberede.