{"id":792,"date":"2024-07-26T15:31:19","date_gmt":"2024-07-26T08:31:19","guid":{"rendered":"https:\/\/bacte.vn\/ky-thuat-xu-ly-dut-diem-nam-phytophthora-gay-hai-tren-cay-sau-rieng\/"},"modified":"2026-07-17T13:31:22","modified_gmt":"2026-07-17T06:31:22","slug":"5-ky-thuat-xu-ly-nam-phytophthora-tren-cay-sau-rieng","status":"publish","type":"post","link":"https:\/\/bacte.vn\/en\/5-ky-thuat-xu-ly-nam-phytophthora-tren-cay-sau-rieng\/","title":{"rendered":"5 K\u1ef9 thu\u1eadt x\u1eed l\u00fd d\u1ee9t \u0111i\u1ec3m n\u1ea5m PHYTOPHTHORA tr\u00ean c\u00e2y s\u1ea7u ri\u00eang"},"content":{"rendered":"

N\u1ea5m Phytophthora tr\u00ean c\u00e2y s\u1ea7u ri\u00eang<\/strong> th\u01b0\u1eddng g\u00e2y th\u1ed1i r\u1ec5, x\u00ec m\u1ee7, ch\u1ea3y nh\u1ef1a v\u00e0 n\u1ee9t th\u00e2n. \u0110\u1ec3 ph\u00f2ng b\u1ec7nh, b\u00e0 con c\u1ea7n nh\u1eadn bi\u1ebft s\u1edbm tri\u1ec7u ch\u1ee9ng khi m\u1edbi ch\u1edbm. Ph\u00f2ng ng\u1eeba hi\u1ec7u qu\u1ea3 nh\u1edd k\u1ebft h\u1ee3p bi\u1ec7n ph\u00e1p sinh h\u1ecdc v\u00e0 h\u00f3a h\u1ecdc. N\u1ebfu x\u1eed l\u00fd ch\u1eadm, n\u1ea5m d\u1ec5 b\u00f9ng ph\u00e1t m\u1ea1nh v\u00e0 g\u00e2y h\u1ea1i tr\u00ean di\u1ec7n r\u1ed9ng. N\u1ea5m Phytophthora tr\u00ean c\u00e2y s\u1ea7u ri\u00eang c\u00f3 th\u1ec3 t\u1ea5n c\u00f4ng th\u00e2n, l\u00e1, hoa, qu\u1ea3 v\u00e0 c\u1ea3 r\u1ec5 \u1edf m\u1ecdi giai \u0111o\u1ea1n.<\/p>\n

1. Bi\u1ec3u hi\u1ec7n n\u1ea5m Phytophthora tr\u00ean c\u00e2y s\u1ea7u ri\u00eang khi b\u1ecb t\u1ea5n c\u00f4ng:<\/h2>\n

1.1. Bi\u1ec3u hi\u1ec7n c\u1ee7a b\u1ec7nh khi n\u1ea5m Phytophthora <\/strong>tr\u00ean c\u00e2y s\u1ea7u ri\u00eang <\/strong>t\u1ea5n c\u00f4ng \u1edf r\u1ec5:<\/h3>\n

\u0110\u1ea5t \u1ea9m th\u1ea5p, tho\u00e1t n\u01b0\u1edbc k\u00e9m<\/strong> l\u00e0 \u0111i\u1ec1u ki\u1ec7n thu\u1eadn l\u1ee3i \u0111\u1ec3 n\u1ea5m Phytophthora tr\u00ean c\u00e2y s\u1ea7u ri\u00eang<\/strong> ph\u00e1t tri\u1ec3n m\u1ea1nh.
\nBan \u0111\u1ea7u, n\u1ea5m t\u1ea5n c\u00f4ng r\u1ec5 non<\/strong>, l\u00e0m th\u1ed1i v\u00e0 ch\u1ebft r\u1ec5<\/strong>, khi\u1ebfn c\u00e2y ch\u1eadm ph\u00e1t tri\u1ec3n.
\nSau \u0111\u00f3, n\u1ea5m lan l\u00ean th\u00e2n v\u00e0 l\u00e1<\/strong>, g\u00e2y ch\u1ea3y nh\u1ef1a, v\u00e0ng l\u00e1<\/strong> v\u00e0 l\u00e0m c\u00e2y suy ki\u1ec7t, ch\u1ebft d\u1ea7n<\/strong>.<\/p>\n

1.2. Tr\u00ean th\u00e2n c\u00e0nh:<\/h3>\n
\"x\u1eed
Phytophthora tr\u00ean c\u00e2y s\u1ea7u ri\u00eang<\/span><\/figcaption><\/figure>\n

C\u00e2y nhi\u1ec5m b\u1ec7nh c\u00f3 l\u00e1 v\u00e0ng, m\u1ea5t b\u00f3ng m\u01b0\u1ee3t<\/strong>, sau \u0111\u00f3 r\u1ee5ng theo t\u1eebng c\u00e0nh ho\u1eb7c m\u1ed9t ph\u00eda c\u00e2y<\/strong>.
\nB\u1ed9 r\u1ec5 b\u1ecb th\u1ed1i<\/strong>, th\u00e2n xu\u1ea5t hi\u1ec7n nh\u1ef1a n\u00e2u \u01b0\u1edbt<\/strong> ch\u1ea3y ra tr\u00ean v\u1ecf.
\nN\u1ea5m t\u1ea5n c\u00f4ng quanh g\u1ed1c v\u00e0 c\u00e0nh<\/strong> khi\u1ebfn c\u00e2y suy y\u1ebfu nhanh.
\nKhi c\u1ea1o l\u1edbp v\u1ecf<\/strong>, th\u1ea5y \u0111\u01b0\u1eddng n\u00e2u s\u1eabm ch\u1ea1y d\u1ecdc trong g\u1ed7<\/strong>.
\nC\u00e2y b\u1ecb b\u1ec7nh n\u1eb7ng s\u1ebd ng\u1eebng ph\u00e1t tri\u1ec3n v\u00e0 ch\u1ebft d\u1ea7n<\/strong>.<\/p>\n

\"x\u1eed
\nX\u00ec m\u1ee7 th\u00e2n do P.palmivora g\u00e2y ra<\/em><\/span><\/p>\n

1.3. Tr\u00ean l\u00e1:<\/h3>\n

V\u1ebft b\u1ec7nh \u0111\u1ea7u ti\u00ean l\u00e0 nh\u1eefng \u0111\u1ed1m \u0111en n\u00e2u nh\u1ecf tr\u00ean m\u1eb7t l\u00e1 v\u00e0 lan r\u1ea5t nhanh, sau 2 ng\u00e0y l\u00e1 chuy\u1ec3n th\u00e0nh m\u00e0u n\u00e2u v\u00e0 b\u00e0o t\u1eed n\u1ea5m l\u00e2y sang l\u00e1 k\u1ebf c\u1eadn, l\u00e1 b\u1ecb nh\u0169ng r\u1ed3i kh\u00f4 d\u1ea7n v\u00e0 s\u1ebd r\u1ee5ng sau v\u00e0i ng\u00e0y, khi c\u00f3 m\u01b0a k\u00e8m theo gi\u00f3 m\u1ea1nh s\u1ebd l\u00e0 \u0111i\u1ec1u ki\u1ec7n t\u1ed1t cho b\u1ec7nh l\u00e2y lan kh\u1eafp c\u1ea3 v\u01b0\u1eddn.<\/p>\n

\"t\u00ecnh
\n\u0110\u1ed1m l\u00e1 do n\u1ea5m Phytophthora tr\u00ean c\u00e2y s\u1ea7u ri\u00eang<\/em><\/span><\/p>\n

1.4. Tr\u00ean tr\u00e1i:<\/h3>\n

V\u1ebft b\u1ec7nh kh\u1edfi \u0111\u1ea7u l\u00e0 ch\u1ea5m nh\u1ecf n\u00e2u \u0111en<\/strong> xu\u1ea5t hi\u1ec7n t\u1eeb cu\u1ed1ng tr\u00e1i lan xu\u1ed1ng xung quanh, hi\u1ebfm khi \u1edf cu\u1ed1i tr\u00e1i.
\nSau \u0111\u00f3, v\u1ebft b\u1ec7nh loang tr\u00f2n m\u00e0u n\u00e2u<\/strong> tr\u00ean v\u1ecf tr\u00e1i.
\nKhi tr\u00e1i gi\u00e0, v\u1ebft b\u1ec7nh n\u1ee9t, th\u1ecbt th\u1ed1i<\/strong>, xu\u1ea5t hi\u1ec7n s\u1ee3i n\u1ea5m tr\u1eafng<\/strong> v\u00e0 l\u00e0m tr\u00e1i r\u1ee5ng s\u1edbm tr\u01b0\u1edbc khi ch\u00edn<\/strong>.<\/p>\n

\"t\u00ecnh<\/p>\n

1.5. \u0110\u1eb7c \u0111i\u1ec3m ph\u00e1t sinh v\u00e0 ph\u00e1t tri\u1ec3n c\u1ee7a n\u1ea5m Phytophthora tr\u00ean c\u00e2y s\u1ea7u ri\u00eang palmivora<\/h3>\n

– N\u1ea5m Phytophthora palmivora ph\u00e1t tri\u1ec3n m\u1ea1nh trong kho\u1ea3ng nhi\u1ec7t \u0111\u1ed9 t\u1eeb 16 \u0111\u1ebfn 32 \u0111\u1ed9 C, \u1ea9m \u0111\u1ed9 kh\u00f4ng kh\u00ed t\u1eeb 80 \u0111\u1ebfn 95 %, nh\u1ea5t l\u00e0 trong m\u00f9a m\u01b0a.<\/p>\n

– Tuy nhi\u00ean, \u1edf nhi\u1ec7t \u0111\u1ed9 d\u01b0\u1edbi 10 \u0111\u1ed9 C hay tr\u00ean 35 \u0111\u1ed9 C n\u1ea5m ng\u1eebng ph\u00e1t tri\u1ec3n.<\/p>\n

– N\u1ea5m Phytophthora palmivora th\u01b0\u1eddng l\u01b0u t\u1ed3n trong \u0111\u1ea5t d\u01b0\u1edbi d\u1ea1ng b\u00e0o t\u1eed v\u00e1ch d\u1ea7y ch\u00fang c\u00f3 kh\u1ea3 n\u0103ng th\u00edch \u1ee9ng.<\/p>\n

– T\u1ed3n t\u1ea1i trong \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng kh\u00f4ng thu\u1eadn l\u1ee3i. Ngo\u00e0i ra, s\u1ee3i n\u1ea5m v\u00e0 b\u00e0o t\u1eed c\u00f2n l\u01b0u t\u1ed3n trong c\u00e1c v\u1ebft b\u1ec7nh tr\u00ean th\u00e2n, tr\u00ean c\u00e0nh, tr\u00ean l\u00e1, tr\u00e1i b\u1ecb b\u1ec7nh v\u00e0 c\u00e1c x\u00e1c b\u1ea3 th\u1ef1c v\u1eadt, t\u1eeb \u0111\u00e2y n\u1ea5m d\u1ec5 d\u00e0ng ph\u00e1t t\u00e1n khi g\u1eb7p \u0111i\u1ec1u ki\u1ec7n thu\u1eadn l\u1ee3i.<\/p>\n

1.6. Ngu\u1ed3n b\u1ec7nh v\u00e0 l\u00e2y lan:<\/h3>\n

– T\u1eeb ngu\u1ed3n b\u1ec7nh ban \u0111\u1ea7u khi g\u1eb7p \u0111i\u1ec1u ki\u1ec7n th\u00edch h\u1ee3p nh\u01b0 nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, m\u01b0a nhi\u1ec1u th\u00ec b\u00e0o t\u1eed v\u00e1ch d\u1ea7y c\u00f3 kh\u1ea3 n\u0103ng sinh s\u1ea3n \u0111\u1ed9ng b\u00e0o t\u1eed<\/p>\n

– Ch\u00fang c\u00f3 th\u1ec3 b\u01a1i l\u1ed9i trong n\u01b0\u1edbc t\u1ef1 do \u0111\u1ebfn v\u1ecb tr\u00ed r\u1ec5 v\u00e0 l\u00f4ng h\u00fat \u0111\u1ec3 g\u00e2y h\u1ea1i nh\u1edd c\u00f3 2 l\u00f4ng roi.<\/p>\n

– T\u1eeb c\u00e1c v\u1ebft b\u1ec7nh ban \u0111\u1ea7u c\u00e1c s\u1ee3i n\u1ea5m s\u1ebd sinh s\u1ea3n r\u1ea5t nhi\u1ec1u b\u00e0o t\u1eed v\u00e0 l\u00e2y lan r\u1ea5t nhanh trong \u0111i\u1ec1u ki\u1ec7n c\u00f3 gi\u00f3, m\u01b0a hay b\u1ecb l\u0169 l\u1ee5t.<\/p>\n

– Ngu\u1ed3n n\u01b0\u1edbc t\u01b0\u1edbi trong v\u01b0\u1eddn c\u0169ng l\u00e0 y\u1ebfu t\u1ed1 l\u00e0m cho n\u1ea5m ph\u00e1t t\u00e1n, l\u00e2y lan r\u1ea5t nhanh trong v\u01b0\u1eddn v\u00e0 trong c\u00f9ng khu v\u1ef1c.<\/p>\n

– Ngo\u00e0i ra, con ng\u01b0\u1eddi v\u00e0 c\u00f4n tr\u00f9ng nh\u01b0 m\u1ed1i, ki\u1ebfn, ngu\u1ed3n c\u00e2y gi\u1ed1ng c\u0169ng l\u00e0 nh\u1eefng t\u00e1c nh\u00e2n g\u00f3p ph\u1ea7n l\u00e0m l\u00e2y lan v\u00e0 ph\u00e1t t\u00e1n ngu\u1ed3n b\u1ec7nh.<\/p>\n

2. C\u00e1ch ph\u00f2ng ng\u1eeba ng\u1ea5m Phytophthora tr\u00ean c\u00e2y s\u1ea7u ri\u00eang:<\/h2>\n

\u0110\u1ec3 ng\u1eeba ng\u1ea5m Phytophthora tr\u00ean c\u00e2y s\u1ea7u ri\u00eang khi b\u1ecb nhi\u1ec5m \u1edf m\u1ee9c \u0111\u1ed9 nh\u1eb9 h\u00e3y \u00e1p d\u1ee5ng nh\u1eefng bi\u1ec7n ph\u00e1p sau<\/p>\n

2.1. Canh t\u00e1c:<\/h3>\n