{"id":9004,"date":"2009-04-20T08:14:28","date_gmt":"2009-04-20T01:14:28","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2009\/04\/xac-dinh-co-che-gay-benh-chet-thong-ma-vi-cua-to-hop-nam-xanh-ophiostoma-sp-va-mot-so-loai-mot-tai-vuon-quoc-gia-tam-dao\/"},"modified":"2013-10-06T09:01:03","modified_gmt":"2013-10-06T02:01:03","slug":"xac-dinh-co-che-gay-benh-chet-thong-ma-vi-cua-to-hop-nam-xanh-ophiostoma-sp-va-mot-so-loai-mot-tai-vuon-quoc-gia-tam-dao","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/xac-dinh-co-che-gay-benh-chet-thong-ma-vi-cua-to-hop-nam-xanh-ophiostoma-sp-va-mot-so-loai-mot-tai-vuon-quoc-gia-tam-dao\/","title":{"rendered":"X\u00e1c \u0111\u1ecbnh c\u01a1 ch\u1ebf g\u00e2y b\u1ec7nh ch\u1ebft Th\u00f4ng m\u00e3 v\u0129 c\u1ee7a t\u1ed5 h\u1ee3p N\u1ea5m xanh (Ophiostoma sp) v\u00e0 m\u1ed9t s\u1ed1 lo\u1ea1i m\u1ecdt t\u1ea1i V\u01b0\u1eddn Qu\u1ed1c gia Tam \u0110\u1ea3o"},"content":{"rendered":"\n

Nguy\u1ec5n Th\u1ecb Thu\u00fd Nga<\/strong> <\/p>\n

Ph\u1ea1m Quang Thu<\/strong> <\/p>\n

Ph\u00f2ng Nghi\u00ean c\u1ee9u B\u1ea3o v\u1ec7 Th\u1ef1c v\u1eadt r\u1eebng<\/em> <\/p>\n

Vi\u1ec7n khoa h\u1ecdc L\u00e2m Nghi\u1ec7p Vi\u1ec7t <\/em>Nam<\/em> <\/p>\n

T\u00d3M T\u1eaeT<\/strong> <\/p>\n

V\u01b0\u1eddn qu\u1ed1c gia Tam \u0110\u1ea3o c\u00f3 di\u1ec7n t\u00edch r\u1eebng th\u00f4ng b\u1ecb nhi\u1ec5m b\u1ec7nh v\u00e0 ch\u1ebft \u0111\u00e3 l\u00ean t\u1edbi 15,0ha v\u00e0 \u0111ang c\u00f3 chi\u1ec1u h\u01b0\u1edbng gia t\u0103ng ph\u1ea1m vi d\u1ecbch b\u1ec7nh. C\u00e2y th\u00f4ng c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng v\u00e0ng l\u00e1, h\u00e9o d\u1ea7n r\u1ed3i ch\u1ebft trong th\u1eddi gian r\u1ea5t ng\u1eafn. Sau khi c\u00e2y ch\u1ebft, v\u1ecf c\u00e2y bong th\u00e0nh t\u1eebng m\u1ea3nh, r\u1ea5t d\u1ec5 b\u00f3c. T\u00e1ch l\u1edbp v\u1ecf c\u00e2y bong l\u00ean thu \u0111\u01b0\u1ee3c c\u00e1c lo\u1ea1i m\u1ecdt kh\u00e1c nhau. T\u1eeb c\u00e1c lo\u1ea1i m\u1ecdt n\u00e0y ph\u00e2n l\u1eadp \u0111\u01b0\u1ee3c N\u1ea5m xanh (Ophiostoma <\/em>sp). T\u1eeb c\u00e1c m\u1ea3nh g\u1ed7 b\u1ecb b\u1ec7nh c\u0169ng ph\u00e2n l\u1eadp \u0111\u01b0\u1ee3c N\u1ea5m xanh (Ophiostoma <\/em>sp). Nh\u01b0 v\u1eady, N\u1ea5m xanh \u0111\u00e3 th\u00e2m nh\u1eadp v\u00e0o th\u00e2n c\u00e2y th\u00f4ng qua v\u00e9c t\u01a1 truy\u1ec1n b\u1ec7nh l\u00e0 c\u00e1c lo\u00e0i m\u1ecdt h\u1ea1i v\u1ecf c\u00e2y s\u1ed1ng. Sau khi N\u1ea5m xanh th\u00e2m nh\u1eadp v\u00e0o th\u00e2n c\u00e2y, ch\u00fang n\u1ea3y m\u1ea7m v\u00e0 ph\u00e1t tri\u1ec3n nhanh trong th\u00e2n c\u00e2y, b\u1ecbt to\u00e0n b\u1ed9 m\u1ea1ch d\u1eabn n\u01b0\u1edbc l\u00ean t\u00e1n v\u00e0 l\u00e1 c\u00e2y d\u1eabn \u0111\u1ebfn t\u00ecnh tr\u1ea1ng l\u00e1 c\u00e2y b\u1ecb h\u00e9o d\u1ea7n, v\u00e0ng l\u00e1 do thi\u1ebfu n\u01b0\u1edbc v\u00e0 c\u00e2y ch\u1ebft d\u1ea7n. Ngo\u00e0i ra c\u00e1c lo\u00e0i m\u1ecdt v\u00e0 s\u00e2u non c\u1ee7a m\u1ecdt t\u1ea1o ra c\u00e1c \u0111\u01b0\u1eddng v\u00f2ng quanh th\u00e2n c\u00e2y, d\u1eabn \u0111\u1ebfn c\u00e2y m\u1ea5t kh\u1ea3 n\u0103ng d\u1eabn nh\u1ef1a luy\u1ec7n nu\u00f4i c\u00e2y v\u00e0 c\u00e2y c\u0169ng ch\u1ebft d\u1ea7n. Nh\u01b0 v\u1eady, c\u01a1 ch\u1ebf g\u00e2y b\u1ec7nh ch\u1ebft th\u00f4ng l\u00e0 do t\u1ed5 h\u1ee3p N\u1ea5m xanh (Ophiostoma <\/em>sp) v\u00e0 m\u1ed9t s\u1ed1 lo\u1ea1i m\u1ecdt h\u1ea1i v\u1ecf c\u00e2y s\u1ed1ng. <\/p>\n

T\u1eeb kh\u00f3a<\/strong> : N\u1ea5m xanh (Ophiostoma <\/em>sp), m\u1ecdt h\u1ea1i v\u1ecf c\u00e2y s\u1ed1ng <\/p>\n

\u0110\u1eb6T V\u1ea4N \u0110\u1ec0<\/strong> <\/p>\n

T\u00e0i nguy\u00ean r\u1eebng ng\u00e0y c\u00e0ng b\u1ecb suy gi\u1ea3m c\u1ea3 v\u1ec1 s\u1ed1 l\u01b0\u1ee3ng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng do nhu c\u1ea7u v\u1ec1 l\u00e2m s\u1ea3n v\u00e0 \u0111\u1ea5t canh t\u00e1c c\u1ee7a con ng\u01b0\u1eddi ng\u00e0y c\u00e0ng cao, k\u00e9o theo h\u00e0ng lo\u1ea1t c\u00e1c \u1ea3nh h\u01b0\u1edfng x\u1ea5u v\u1ec1 m\u00f4i tr\u01b0\u1eddng sinh th\u00e1i. Theo Manraud, tr\u01b0\u1edbc n\u0103m 1945, t\u1ef7 l\u1ec7 che ph\u1ee7 c\u1ee7a r\u1eebng n\u01b0\u1edbc ta chi\u1ebfm 43% t\u1ed5ng di\u1ec7n t\u00edch \u0111\u1ea5t \u0111ai c\u1ee7a c\u1ea3 n\u01b0\u1edbc nh\u01b0ng theo s\u1ed1 li\u1ec7u th\u1ed1ng k\u00ea n\u0103m 2005, t\u1ef7 l\u1ec7 che ph\u1ee7 \u0111\u00f3 ch\u1ec9 c\u00f2n l\u1ea1i x\u1ea5p x\u1ec9 37%. V\u00ec v\u1eady, kh\u00f4i ph\u1ee5c v\u00e0 ph\u00e1t tri\u1ec3n t\u00e0i nguy\u00ean r\u1eebng l\u00e0 m\u1ed9t y\u00eau c\u1ea7u quan tr\u1ecdng v\u00e0 c\u1ea5p thi\u1ebft. <\/p>\n

C\u1eadp nh\u1eadt t\u1ea1i \u0111\u00e2y<\/strong> <\/p>\n","protected":false},"excerpt":{"rendered":"

\nV\u01b0\u1eddn qu\u1ed1c gia Tam \u0110\u1ea3o có di\u1ec7n tích r\u1eebng thông b\u1ecb nhi\u1ec5m b\u1ec7nh và ch\u1ebft \u0111ã lên t\u1edbi 15,0ha và \u0111ang có chi\u1ec1u h\u01b0\u1edbng gia t\u0103ng ph\u1ea1m vi d\u1ecbch b\u1ec7nh. Cây thông có hi\u1ec7n t\u01b0\u1ee3ng vàng lá, héo d\u1ea7n r\u1ed3i ch\u1ebft trong th\u1eddi gian r\u1ea5t ng\u1eafn. Sau khi cây ch\u1ebft, v\u1ecf cây bong thành t\u1eebng m\u1ea3nh, r\u1ea5t d\u1ec5 bóc. Tách l\u1edbp v\u1ecf cây bong lên thu \u0111\u01b0\u1ee3c các lo\u1ea1i m\u1ecdt khác nhau. T\u1eeb các lo\u1ea1i m\u1ecdt này phân l\u1eadp \u0111\u01b0\u1ee3c N\u1ea5m xanh (Ophiostoma <\/em>sp). T\u1eeb các m\u1ea3nh g\u1ed7 b\u1ecb b\u1ec7nh c\u0169ng phân l\u1eadp \u0111\u01b0\u1ee3c N\u1ea5m xanh (Ophiostoma <\/em>sp). Nh\u01b0 v\u1eady, N\u1ea5m xanh \u0111ã thâm nh\u1eadp vào thân cây thông qua véc t\u01a1 truy\u1ec1n b\u1ec7nh là các loài m\u1ecdt h\u1ea1i v\u1ecf cây s\u1ed1ng. Sau khi N\u1ea5m xanh thâm nh\u1eadp vào thân cây, chúng n\u1ea3y m\u1ea7m và phát tri\u1ec3n nhanh trong thân cây, b\u1ecbt toàn b\u1ed9 m\u1ea1ch d\u1eabn n\u01b0\u1edbc lên tán và lá cây d\u1eabn \u0111\u1ebfn tình tr\u1ea1ng lá cây b\u1ecb héo d\u1ea7n, vàng lá do thi\u1ebfu n\u01b0\u1edbc và cây ch\u1ebft d\u1ea7n. Ngoài ra các loài m\u1ecdt và sâu non c\u1ee7a m\u1ecdt t\u1ea1o ra các \u0111\u01b0\u1eddng vòng quanh thân cây, d\u1eabn \u0111\u1ebfn cây m\u1ea5t kh\u1ea3 n\u0103ng d\u1eabn nh\u1ef1a luy\u1ec7n nuôi cây và cây c\u0169ng ch\u1ebft d\u1ea7n. Nh\u01b0 v\u1eady, <\/span>c\u01a1 ch\u1ebf gây b\u1ec7nh ch\u1ebft thông là do t\u1ed5 h\u1ee3p N\u1ea5m xanh (Ophiostoma <\/em>sp) và m\u1ed9t s\u1ed1 lo\u1ea1i m\u1ecdt h\u1ea1i v\u1ecf cây s\u1ed1ng.<\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[18],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9004"}],"collection":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/comments?post=9004"}],"version-history":[{"count":1,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9004\/revisions"}],"predecessor-version":[{"id":10460,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9004\/revisions\/10460"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=9004"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=9004"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=9004"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}