{"id":4761,"date":"2020-03-25T10:43:10","date_gmt":"2020-03-25T03:43:10","guid":{"rendered":"http:\/\/hoinongdanhp.org.vn\/?p=4761"},"modified":"2020-03-25T10:43:10","modified_gmt":"2020-03-25T03:43:10","slug":"benh-dao-on-hai-lua-va-cach-tri-hieu-qua","status":"publish","type":"post","link":"https:\/\/hoinongdanhp.org.vn\/index.php\/2020\/03\/25\/benh-dao-on-hai-lua-va-cach-tri-hieu-qua\/","title":{"rendered":"B\u1ec7nh \u0111\u1ea1o \u00f4n h\u1ea1i l\u00faa v\u00e0 c\u00e1ch tr\u1ecb hi\u1ec7u qu\u1ea3"},"content":{"rendered":"

L\u00faa l\u00e0 c\u00e2y tr\u1ed3ng ch\u00ednh v\u00e0 quan tr\u1ecdng trong s\u1ea3n xu\u1ea5t n\u00f4ng nghi\u1ec7p n\u01b0\u1edbc ta. Tuy nhi\u00ean, m\u1ed9t khi \u0111\u01b0\u1ee3c th\u00e2m canh t\u0103ng n\u0103ng su\u1ea5t v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng, nhi\u1ec1u lo\u1ea1i d\u1ecbch h\u1ea1i xu\u1ea5t hi\u1ec7n.<\/strong><\/p>\n

 <\/p>\n

\"\"<\/p>\n

B\u1ec7nh \u0111\u1ea1o \u00f4n l\u00e0 m\u1ed9t trong nh\u1eefng d\u1ecbch h\u1ea1i nguy hi\u1ec3m l\u00e0m \u1ea3nh h\u01b0\u1edfng l\u1edbn \u0111\u1ebfn n\u0103ng su\u1ea5t v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng l\u00faa. Tr\u01b0\u1edbc \u0111\u00e2y, b\u1ec7nh \u0111\u1ea1o \u00f4n ch\u1ec9 xu\u1ea5t hi\u1ec7n trong v\u1ee5 l\u00faa \u0111\u00f4ng xu\u00e2n. Tuy nhi\u00ean, trong nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y, b\u1ec7nh \u0111\u1ea1o \u00f4n \u0111\u00e3 g\u00e2y h\u1ea1i h\u1ea7u h\u1ebft c\u00e1c v\u1ee5 l\u00faa trong n\u0103m, nh\u1ea5t l\u00e0 c\u00e1c t\u1ec9nh ph\u00eda Nam. B\u1ec7nh \u0111\u1ea1o \u00f4n \u0111\u00e3 g\u00e2y kh\u00f3 kh\u0103n cho ngh\u1ec1 s\u1ea3n xu\u1ea5t l\u00faa v\u00e0 l\u00e0m m\u1ea5t th\u00eam chi ph\u00ed ph\u00f2ng tr\u1eeb.<\/p>\n

Tri\u1ec7u ch\u1ee9ng v\u00e0 t\u00e1c nh\u00e2n g\u00e2y h\u1ea1i: B\u1ec7nh do n\u1ea5m Pyricularia oryzae g\u00e2y ra. N\u00e2\u0301m b\u1ec7nh c\u00f3 th\u1ec3 t\u00e2\u0301n c\u00f4ng tr\u00ean l\u00e1, th\u00e2n, c\u1ed5 b\u00f4ng, c\u00f4\u0309 gi\u00e9 ho\u0103\u0323c h\u1ea1t l\u00faa. Tr\u00ean l\u00e1, ban \u0111\u1ea7u v\u1ebft b\u1ec7nh r\u1ea5t nh\u1ecf, nh\u01b0ng \u1edf gi\u1eefa v\u1ebft b\u1ec7nh, ph\u1ea7n t\u1ebf b\u00e0o l\u00e1 \u0111\u00e3 b\u1ecb ho\u1ea1i t\u1eed v\u00e0 kh\u00f4 x\u00e1m, sau \u0111\u00f3 v\u1ebft b\u1ec7nh l\u1edbn d\u1ea7n v\u00e0 c\u00f3 h\u00ecnh thoi, \u0111\u00e2y l\u00e0 v\u1ebft b\u1ec7nh \u0111\u1eb7c tr\u01b0ng c\u1ee7a \u0111\u1ea1o \u00f4n. Khi b\u1ec7nh n\u1eb7ng, nhi\u1ec1u v\u1ebft b\u1ec7nh li\u00ean k\u1ebft v\u1edbi nhau l\u00e0m cho to\u00e0n l\u00e1 b\u1ecb “ch\u00e1y”. Nguy hi\u1ec3m nh\u1ea5t l\u00e0 khi n\u1ea5m t\u1ea5n c\u00f4ng tr\u00ean c\u1ed5 b\u00f4ng v\u00e0 c\u1ed5 gi\u00e9, l\u00e0m cho to\u00e0n b\u1ed9 b\u00f4ng ho\u1eb7c gi\u00e9 b\u1ecb kh\u00f4 v\u00e0 g\u00e3y g\u1ee5c…<\/p>\n

\u0110i\u1ec1u ki\u1ec7n ph\u00e1t sinh ph\u00e1t tri\u1ec3n: Trong \u0111i\u1ec1u ki\u1ec7n tr\u1eddi m\u00e2y \u00e2m u, \u00edt n\u1eafng, th\u1eddi ti\u1ebft m\u00e1t, \u1ea9m \u0111\u1ed9 cao, k\u1ebft h\u1ee3p \u0111\u00eam c\u00f3 s\u01b0\u01a1ng m\u00f9 nhi\u1ec1u th\u00ec b\u1ec7nh ph\u00e1t tri\u1ec3n m\u1ea1nh. B\u1ec7nh c\u0169ng th\u01b0\u1eddng g\u00e2y h\u1ea1i n\u1eb7ng tr\u00ean nh\u1eefng ru\u1ed9ng s\u1eed d\u1ee5ng gi\u1ed1ng l\u00faa nhi\u1ec5m b\u1ec7nh, gieo s\u1ea1 d\u00e0y, b\u00f3n ph\u00e2n th\u1eeba \u0111\u1ea1m…<\/p>\n

M\u1ed9t s\u1ed1 bi\u1ec7n ph\u00e1p qu\u1ea3n l\u00fd b\u1ec7nh \u0111\u1ea1o \u00f4n \u0111\u00e3 \u0111\u01b0\u1ee3c b\u00e0 con n\u00f4ng d\u00e2n \u00e1p d\u1ee5ng \u0111\u1ea1t hi\u1ec7u qu\u1ea3:<\/p>\n

– S\u1eed d\u1ee5ng gi\u1ed1ng kh\u00e1ng b\u1ec7nh ho\u1eb7c \u00edt nhi\u1ec5m \u0111\u1ec3 gieo tr\u1ed3ng.<\/p>\n

– X\u1eed l\u00fd h\u1ea1t gi\u1ed1ng tr\u01b0\u1edbc khi gieo s\u1ea1.<\/p>\n

– Tr\u01b0\u1edbc khi gieo tr\u1ed3ng, v\u1ec7 sinh \u0111\u1ed3ng ru\u1ed9ng, d\u1ecdn s\u1ea1ch t\u00e0n d\u01b0 c\u00e2y b\u1ec7nh v\u1ee5 tr\u01b0\u1edbc (tr\u1ee5c v\u00e0 d\u00ecm k\u1ef9 g\u1ed1c r\u1ea1), d\u1ecdn s\u1ea1ch c\u1ecf d\u1ea1i quanh b\u1edd…<\/p>\n

– Kh\u00f4ng gieo s\u1ea1 qu\u00e1 d\u00e0y \u0111\u1ec3 c\u00e2y l\u00faa \u0111\u01b0\u1ee3c kh\u1ecfe m\u1ea1nh, kh\u00e1ng \u0111\u01b0\u1ee3c b\u1ec7nh (\u00e1p d\u1ee5ng theo l\u01b0\u1ee3ng gi\u1ed1ng khuy\u1ebfn c\u00e1o c\u1ee7a ch\u01b0\u01a1ng tr\u00ecnh IPM, kho\u1ea3ng 120kg\/ha, n\u1ebfu s\u1ea1 h\u00e0ng th\u00ec l\u01b0\u1ee3ng gi\u1ed1ng c\u00f2n \u00edt h\u01a1n).<\/p>\n

– B\u00f3n ph\u00e2n c\u00e2n \u0111\u1ed1i h\u1ee3p l\u00fd, kh\u00f4ng b\u00f3n th\u1eeba \u0111\u1ea1m, n\u00ean s\u1eed d\u1ee5ng ph\u00e2n b\u00f3n theo b\u1ea3ng so m\u00e0u l\u00e1 l\u00faa. (khi l\u00faa b\u1ecb th\u1eeba \u0111\u1ea1m, l\u00e1 c\u00f3 m\u00e0u xanh \u0111\u1eadm v\u00e0 phi\u1ebfn l\u00e1 s\u1ebd kh\u00f4ng \u0111\u1ee9ng th\u1eb3ng m\u00e0 n\u1eb1m ngang).<\/p>\n

– Khi \u0111i\u1ec1u ki\u1ec7n th\u1eddi ti\u1ebft ph\u00f9 h\u1ee3p cho b\u1ec7nh ph\u00e1t sinh, ph\u00e1t tri\u1ec3n (nh\u01b0 \u0111\u00e3 n\u00eau \u1edf tr\u00ean), th\u00ec ch\u1ee7 \u0111\u1ed9ng ph\u00f2ng ng\u1eeba tr\u01b0\u1edbc nh\u01b0 h\u1ea1n ch\u1ebf ph\u00e2n \u0111\u1ea1m, t\u0103ng c\u01b0\u1eddng ph\u00e2n kali. C\u00f3 th\u1ec3 ch\u1ee7 \u0111\u1ed9ng phun thu\u1ed1c ph\u00f2ng ng\u1eeba tr\u01b0\u1edbc n\u1ebfu ru\u1ed9ng \u0111\u01b0\u1ee3c gieo s\u1ea1 d\u00e0y b\u1eb1ng gi\u1ed1ng nhi\u1ec5m v\u00e0 \u0111\u00e3 b\u1ecb d\u01b0 \u0111\u1ea1m.<\/p>\n

– Theo d\u00f5i ru\u1ed9ng th\u01b0\u1eddng xuy\u00ean, nh\u1ea5t l\u00e0 nh\u1eefng giai \u0111o\u1ea1n c\u00e2y l\u00faa m\u1eabn c\u1ea3m v\u1edbi b\u1ec7nh (t\u1eeb giai \u0111o\u1ea1n l\u00faa con g\u00e1i \u0111\u1ebfn \u0111\u00f2ng tr\u1ed5). Khi th\u1ea5y b\u1ec7nh ch\u1edbm xu\u1ea5t hi\u1ec7n tr\u00ean \u0111\u1ed3ng th\u00ec ng\u1eebng s\u1eed d\u1ee5ng ph\u00e2n \u0111\u1ea1m v\u00e0 c\u1ea7n phun ho\u1eb7c r\u1ea3i m\u1ed9t trong c\u00e1c lo\u1ea1i thu\u1ed1c sau:<\/p>\n

+ Phun Trizole 400SC\/75WP\/WDG, ho\u1eb7c Saipan 2SL, hay L\u00faa v\u00e0ng 20WP. \u0110\u1eb7c bi\u1ec7t, Trizole 400SC l\u00e0 s\u1ea3n ph\u1ea9m m\u1edbi d\u1ea1ng n\u01b0\u1edbc, r\u1ea5t d\u1ec5 s\u1eed d\u1ee5ng, v\u1edbi li\u1ec1u l\u01b0\u1ee3ng 0,5 – 0,6 l\u00edt\/ha cho hi\u1ec7u qu\u1ea3 tr\u1eeb b\u1ec7nh r\u1ea5t cao. Saipan 2SL v\u1eeba ph\u00f2ng tr\u1eeb \u0111\u01b0\u1ee3c b\u1ec7nh \u0111\u1ea1o \u00f4n v\u00e0 ch\u00e1y b\u00eca l\u00e1 l\u00faa (b\u1ea1c l\u00e1).<\/p>\n

+ R\u1ea3i thu\u1ed1c h\u1ea1t Kisaigon 10H.<\/p>\n

+ N\u1ebfu b\u1ec7nh ph\u00e1t tri\u1ec3n m\u1ea1nh th\u00ec c\u00f3 th\u1ec3 phun l\u1ea1i sau 5 – 7 ng\u00e0y. K\u1ebft h\u1ee3p r\u1ea3i thu\u1ed1c h\u1ea1t.<\/p>\n\n\n\n
Ch\u00fa \u00fd khi phun x\u1ecbt thu\u1ed1c: Phun \u0111\u1ee7 l\u01b0\u1ee3ng n\u01b0\u1edbc v\u1edbi bec phun t\u01a1i s\u01b0\u01a1ng, phun khi ru\u1ed9ng \u0111\u00e3 r\u00e1o s\u01b0\u01a1ng ho\u1eb7c r\u00e1o n\u01b0\u1edbc sau m\u01b0a. C\u00f3 th\u1ec3 phun ng\u1eeba tr\u01b0\u1edbc khi l\u00faa tr\u1ed5 ho\u1eb7c sau khi l\u00faa \u0111\u00e3 tr\u1ed5 \u0111\u1ec1u.<\/em><\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

Tr\u01b0\u01a1ng Th\u1ecb L\u00e0nh – Trung t\u00e2m TTDN&HTND. S\u01b0u t\u1ea7m nongnghiep.vn<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

L\u00faa l\u00e0 c\u00e2y tr\u1ed3ng ch\u00ednh v\u00e0 quan tr\u1ecdng trong s\u1ea3n xu\u1ea5t n\u00f4ng nghi\u1ec7p n\u01b0\u1edbc ta. Tuy nhi\u00ean, m\u1ed9t khi \u0111\u01b0\u1ee3c th\u00e2m canh t\u0103ng n\u0103ng su\u1ea5t v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng, nhi\u1ec1u lo\u1ea1i d\u1ecbch h\u1ea1i xu\u1ea5t hi\u1ec7n.   B\u1ec7nh \u0111\u1ea1o \u00f4n l\u00e0 m\u1ed9t trong nh\u1eefng d\u1ecbch h\u1ea1i nguy hi\u1ec3m l\u00e0m \u1ea3nh h\u01b0\u1edfng l\u1edbn \u0111\u1ebfn n\u0103ng su\u1ea5t v\u00e0 ch\u1ea5t […]<\/p>\n","protected":false},"author":12,"featured_media":4762,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"tdm_status":"","tdm_grid_status":"","footnotes":""},"categories":[27,25],"tags":[],"class_list":{"0":"post-4761","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-khoa-hoc-ky-thuat","8":"category-nha-nong-can-biet"},"_links":{"self":[{"href":"https:\/\/hoinongdanhp.org.vn\/index.php\/wp-json\/wp\/v2\/posts\/4761","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hoinongdanhp.org.vn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hoinongdanhp.org.vn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hoinongdanhp.org.vn\/index.php\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/hoinongdanhp.org.vn\/index.php\/wp-json\/wp\/v2\/comments?post=4761"}],"version-history":[{"count":0,"href":"https:\/\/hoinongdanhp.org.vn\/index.php\/wp-json\/wp\/v2\/posts\/4761\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hoinongdanhp.org.vn\/index.php\/wp-json\/wp\/v2\/media\/4762"}],"wp:attachment":[{"href":"https:\/\/hoinongdanhp.org.vn\/index.php\/wp-json\/wp\/v2\/media?parent=4761"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hoinongdanhp.org.vn\/index.php\/wp-json\/wp\/v2\/categories?post=4761"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hoinongdanhp.org.vn\/index.php\/wp-json\/wp\/v2\/tags?post=4761"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}