{"id":492,"date":"2023-04-23T04:33:05","date_gmt":"2023-04-23T04:33:05","guid":{"rendered":"https:\/\/vattutrongtrot.net\/?p=492"},"modified":"2023-04-23T04:33:05","modified_gmt":"2023-04-23T04:33:05","slug":"ky-thuat-trong-va-cham-soc-cay-cha-la","status":"publish","type":"post","link":"https:\/\/vattutrongtrot.net\/index.php\/2023\/04\/23\/ky-thuat-trong-va-cham-soc-cay-cha-la\/","title":{"rendered":"K\u1ef8 THU\u1eacT TR\u1ed2NG V\u00c0 CH\u0102M S\u00d3C C\u00c2Y CH\u00c0 L\u00c0"},"content":{"rendered":"

I.Quy tr\u00ecnh tr\u1ed3ng c\u00e2y ch\u00e0 l\u00e0 \u1edf \u0111\u00f4 th\u1ecb \u0111\u01b0\u1eddng ph\u1ed1 v\u00e0 resort \u2026 :<\/strong><\/p>\n

\u2013 B\u01b0\u1edbc 1. \u0110\u1ecbnh v\u1ecb v\u1ecb tr\u00ed tr\u1ed3ng c\u00e2y:<\/em><\/strong><\/p>\n

* \u0110\u1ed1i v\u1edbi c\u00e1c tuy\u1ebfn ph\u1ed1\u00a0tr\u1ed3ng m\u1edbi tr\u00ean to\u00e0n tuy\u1ebfn:<\/em><\/p>\n

\u2013 X\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed c\u00e2y tr\u1ed3ng \u0111\u1ea7u h\u00e0ng v\u00e0 c\u00e2y tr\u1ed3ng cu\u1ed1i h\u00e0ng theo thi\u1ebft k\u1ebf, d\u00f9ng d\u00e2y \u0111\u1ec3 c\u0103ng th\u1eb3ng, s\u1eed d\u1ee5ng th\u01b0\u1edbc \u0111o chia kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c c\u00e2y \u0111\u1ea3m b\u1ea3o \u0111\u1ec1u nhau (t\u1eeb 3m \u2013 8m).<\/p>\n

\u2013 \u0110\u1ecbnh v\u1ecb x\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed s\u01a1 \u0111\u1ed3 tr\u1ed3ng c\u00e2y c\u1ee7a t\u1eebng tuy\u1ebfn (\u0111\u00e1nh d\u1ea5u s\u01a1n ho\u1eb7c \u0111\u00f3ng c\u1ecdc) \u0111\u1ea3m b\u1ea3o c\u00e2y tr\u1ed3ng \u0111\u01b0\u1ee3c th\u1eb3ng h\u00e0ng, kho\u1ea3ng c\u00e1ch \u0111\u1ec1u, \u0111\u1ed1i x\u1ee9ng nhau (n\u1ebfu tr\u1ed3ng th\u00e0nh 2 h\u00e0ng tr\u1edf l\u00ean) t\u1ea1o c\u1ea3nh quan \u0111\u1ec1u, \u0111\u1eb9p m\u1eaft.<\/p>\n

\u2013 Tr\u1ed3ng theo thi\u1ebft k\u1ebf v\u00e0 h\u1ed1 tr\u1ed3ng c\u1ee7a d\u1ef1 \u00e1n (\u0111\u1ed1i v\u1edbi d\u1ef1 \u00e1n \u0111\u00e3 thi c\u00f4ng c\u00f3 s\u1eb5n h\u1ed1).<\/p>\n

* \u0110\u1ed1i v\u1edbi vi\u1ec7c tr\u1ed3ng b\u1ed5 sung c\u00e2y v\u00e0o h\u1ed1 tr\u1ed1ng, v\u1ecb tr\u00ed tr\u1ed1ng:<\/em><\/p>\n

\u2013 Th\u1ef1c hi\u1ec7n tr\u1ed3ng th\u1eb3ng h\u00e0ng, kho\u1ea3ng c\u00e1ch t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u1ed3ng \u0111\u1ec1u nhau v\u1edbi c\u00e2y li\u1ec1n k\u1ec1 tr\u00ean tuy\u1ebfn ph\u1ed1 v\u00e0 theo th\u1ef1c t\u1ebf m\u1eb7t b\u1eb1ng.<\/p>\n

B\u01b0\u1edbc 2:<\/em><\/strong>\u00a0Chu\u1ea9n b\u1ecb m\u1eb7t b\u1eb1ng, v\u1eadt li\u1ec7u tr\u1ed3ng c\u00e2y g\u1ed3m \u0111\u1ea5t m\u00e0u, gi\u00e1 th\u1ec3 x\u01a1 d\u1eeba, m\u00f9n h\u1eefu c\u01a1 (ph\u00e2n b\u00f2), bao t\u1ea3i, ph\u00e2n h\u1eefu c\u01a1\u2026v\u00e0 c\u00e1c d\u1ee5ng c\u1ee5 lao \u0111\u1ed9ng, m\u00e1y m\u00f3c thi c\u00f4ng tr\u01b0\u1edbc khi tr\u1ed3ng c\u00e2y.<\/p>\n

B\u01b0\u1edbc\u00a03. \u0110\u00e0o h\u1ed1\u00a0tr\u1ed3ng c\u00e2y:<\/em><\/strong><\/p>\n

\u2013 Ti\u1ebfn h\u00e0nh: T\u1eeb v\u1ecb tr\u00ed tim h\u1ed1, ng\u01b0\u1eddi c\u00f4ng nh\u00e2n \u0111\u00e0o h\u1ed1 h\u00ecnh vu\u00f4ng c\u00f3 c\u1ea1nh t\u1ed1i thi\u1ec3u L(m) = K\u00edch th\u01b0\u1edbc b\u1ea7u c\u00e2y + 0,2m. \u0110\u00e0o h\u1ed1 \u0111\u1ebfn chi\u1ec1u s\u00e2u h\u01a1n k\u00edch th\u01b0\u1edbc chi\u1ec1u cao b\u1ea7u c\u00e2y t\u1ed1i thi\u1ec3u 0,3m \u0111\u1ed1i v\u1edbi m\u1eb7t b\u1eb1ng tr\u1ed3ng c\u00e2y c\u00f3 \u0111\u1ea5t t\u1ef1 nhi\u00ean ph\u00f9 h\u1ee3p cho c\u00e2y tr\u1ed3ng.<\/p>\n

\u2013 Trong tr\u01b0\u1eddng h\u1ee3p \u0111\u1ea5t kh\u00f4ng \u0111\u1ea3m b\u1ea3o (\u0111\u1ea5t b\u00f9n s\u00e9t, c\u00e1t, tr\u1ea1c v\u1eefa, b\u1ea1c m\u00e0u\u2026), v\u1eadn chuy\u1ec3n \u0111\u1ea5t ph\u1ebf th\u1ea3i v\u00e0 \u0111\u00e0o r\u1ed9ng h\u1ed1 \u0111\u1ec3 b\u1ed5 sung \u0111\u1ea5t m\u00e0u, m\u00f9n h\u1eefu c\u01a1, gi\u00e1 th\u1ec3 x\u01a1 d\u1eeba, ph\u00e2n h\u1eefu c\u01a1 (ph\u00e2n b\u00f2)\u2026 ph\u00f9 h\u1ee3p \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o cho s\u1ef1 sinh tr\u01b0\u1edfng, ph\u00e1t tri\u1ec3n c\u1ee7a c\u00e2y.<\/p>\n

B\u01b0\u1edbc 4.\u00a0C\u00f4ng t\u00e1c v\u1eadn chuy\u1ec3n:<\/em><\/strong><\/p>\n

\u2013 S\u1eed d\u1ee5ng \u00f4 t\u00f4 ho\u1eb7c xe c\u1ea9u v\u1eadn chuy\u1ec3n c\u00e2y \u0111\u1ebfn n\u01a1i tr\u1ed3ng. Qu\u00e1 tr\u00ecnh v\u1eadn chuy\u1ec3n ph\u1ea3i \u0111\u1ea3m b\u1ea3o b\u1ea7u c\u00e2y kh\u00f4ng b\u1ecb n\u1ee9t, v\u1ee1. D\u00f9ng bao t\u1ea3i b\u00f3 quanh th\u00e2n c\u00e2y \u0111\u1ec3 b\u1ea3o v\u1ec7 th\u00e2n c\u00e2y trong qu\u00e1 tr\u00ecnh v\u1eadn chuy\u1ec3n v\u00e0 gi\u1ea3m tho\u00e1t h\u01a1i n\u01b0\u1edbc, (n\u1ebfu c\u1ea7n).<\/p>\n

B\u01b0\u1edbc 5. B\u00f3n ph\u00e2n v\u00e0 \u0111\u1ea5t tr\u1ed3ng c\u00e2y:<\/em><\/strong><\/p>\n

\u2013 Cho \u0111\u1ea5t m\u00e0u \u0111\u01b0\u1ee3c tr\u1ed9n l\u1eabn m\u00f9n, gi\u00e1 th\u1ec3 x\u01a1 d\u1eeba, ph\u00e2n h\u1eefu c\u01a1 (ph\u00e2n b\u00f2)\u2026xu\u1ed1ng h\u1ed1 \u0111\u1ec3 \u0111\u1ed9 cao ph\u00f9 h\u1ee3p. Sau khi c\u1ea9u c\u00e2y tr\u1ed3ng \u0111\u01b0a xu\u1ed1ng h\u1ed1 tr\u1ed3ng ph\u1ea3i th\u00e1o b\u1ecf bao b\u1ea7u c\u00e2y (\u0111\u1ed1i v\u1edbi v\u1ecf b\u1ea7u kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng t\u1ef1 ph\u00e2n h\u1ee7y), c\u1eaft h\u1ebft d\u00e2y bu\u1ed9c, \u0111\u1eb7t b\u1ea7u c\u00e2y v\u00e0o ch\u00ednh gi\u1eefa h\u1ed1 \u0111\u1ea3m b\u1ea3o c\u00e2y tr\u1ed3ng th\u1eb3ng \u0111\u1ee9ng (ki\u1ec3m tra theo 2 h\u01b0\u1edbng: song song v\u00e0 vu\u00f4ng g\u00f3c v\u1edbi v\u1ec9a h\u00e8) \u0111\u1eb7t c\u00e2y sao cho c\u1ed5 r\u1ec5 th\u1ea5p h\u01a1n cao \u0111\u1ed9 m\u1eb7t h\u00e8.<\/p>\n

\u2013 \u0110i\u1ec1u ch\u1ec9nh cho c\u00e2y th\u1eb3ng \u0111\u1ee9ng, khi \u0111\u00e3 \u0111\u1ea1t y\u00eau c\u1ea7u cho \u0111\u1ea5t m\u00e0u tr\u1ed9n gi\u00e1 th\u1ec3 x\u01a1 d\u1eeba\u00a0 + ph\u00e2n h\u1eefu c\u01a1 (ph\u00e2n b\u00f2) v\u00e0o h\u1ed1, l\u1ea5p \u0111\u1ebfn qu\u00e1 n\u1eeda h\u1ed1 r\u1ed3i n\u00e8n ch\u1eb7t xung quanh b\u1ea7u, t\u01b0\u1edbi nh\u1eb9 n\u01b0\u1edbc (\u0111\u00e3 \u0111\u01b0\u1ee3c pha ch\u1ea5t k\u00edch th\u00edch ra r\u1ec5) \u0111\u1ec1u quanh b\u1ea7u c\u00e2y.<\/p>\n

\u2013 Ti\u1ebfp t\u1ee5c l\u1ea5p \u0111\u1ea5t xung quanh b\u1ea7u c\u00e2y v\u00e0 l\u00e8n ch\u1eb7t \u0111\u1ebfn mi\u1ec7ng h\u1ed1. Ti\u1ebfn h\u00e0nh t\u01b0\u1edbi \u0111\u1eabm n\u01b0\u1edbc v\u00e0 l\u00e0m v\u1eebng xung quanh g\u1ed1c \u0111\u1ec3 gi\u1eef n\u01b0\u1edbc kh\u00f4ng tr\u00e0n ra ngo\u00e0i h\u1ed1 tr\u1ed3ng.<\/p>\n

B\u01b0\u1edbc 6. C\u1ecdc ch\u1ed1ng cho c\u00e2y:<\/em><\/strong><\/p>\n

\u2013 D\u00f9ng c\u1ecdc g\u1ed7 ch\u1ed1ng gi\u1eef c\u00e2y tr\u1ed3ng lu\u00f4n \u0111\u01b0\u1ee3c th\u1eb3ng \u0111\u1ee9ng kh\u00f4ng b\u1ecb nghi\u00eang, \u0111\u1ed5 do gi\u00f3 v\u00e0 \u1ed5n \u0111\u1ecbnh b\u1ed9 \u0111\u01b0\u1ee3c r\u1ec5.<\/p>\n

\u2013 Chi\u1ec1u cao c\u1ee7a c\u1ecdc ch\u1ed1ng sau khi \u0111\u00e3 l\u1eafp gh\u00e9p (tr\u00ean m\u1eb7t \u0111\u1ea5t) t\u1ed1i thi\u1ec3u b\u1eb1ng 1\/3 chi\u1ec1u cao c\u00e2y tr\u1edf l\u00ean.<\/p>\n

\u2013 V\u1ecb tr\u00ed ch\u1ed1ng c\u1ecdc v\u00e0o th\u00e2n c\u00e2y c\u00e1ch g\u1ed1c kho\u1ea3ng 1\/3 chi\u1ec1u cao c\u00e2y v\u1edbi \u0111\u1ed9 nghi\u00eang g\u00f3c ch\u1ed1ng t\u1ed1i \u01b0u t\u1eeb 30\u00b0- 40\u00b0. Ch\u00e2n c\u1ecdc \u0111\u00f3ng s\u00e2u xu\u1ed1ng \u0111\u1ea5t t\u1ed1i thi\u1ec3u 5cm \u0111\u1ec3 c\u00f3 \u0111i\u1ec3m ch\u1ed1ng.<\/p>\n

\u2013 Trong tr\u01b0\u1eddng h\u1ee3p kh\u00f4ng th\u1ec3 \u0111\u1eb7t ch\u00e2n c\u1ecdc g\u1ecdn trong h\u1ed1 tr\u1ed3ng c\u00e2y do g\u00f3c ch\u1ed1ng h\u1eb9p kh\u00f4ng \u0111\u1ea3m b\u1ea3o vi\u1ec7c ch\u1ed1ng gi\u1eef c\u00e2y c\u00f3 th\u1ec3 \u0111\u1eb7t v\u1ecb tr\u00ed ch\u00e2n c\u1ecdc n\u1eb1m tr\u00ean v\u1ec9a h\u00e8 s\u00e2u xu\u1ed1ng \u0111\u1ea5t t\u1ed1i thi\u1ec3u 5cm.<\/p>\n

\u2013 Th\u1eddi gian s\u1eed d\u1ee5ng c\u1ecdc ch\u1ed1ng cho c\u00e2y:<\/p>\n

+ \u0110\u1ed1i v\u1edbi c\u00e2y \u0111\u01b0\u1eddng k\u00ednh t\u1eeb <15 cm: T\u1ed1i thi\u1ec3u 2 n\u0103m.<\/p>\n

+ \u0110\u1ed1i v\u1edbi c\u00e2y c\u00f3 \u0111\u01b0\u1eddng k\u00ednh t\u1eeb 15cm tr\u1edf l\u00ean: T\u1ed1i thi\u1ec3u 3 n\u0103m. C\u00f3 th\u1ec3 d\u00f9ng c\u1ecdc ch\u1ed1ng c\u00f3 tu\u1ed5i th\u1ecd cao (theo thi\u1ebft k\u1ebf \u0111\u01b0\u1ee3c duy\u1ec7t) \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n l\u00e2u d\u00e0i cho c\u00e2y. Ph\u1ea7n c\u1ecdc ti\u1ebfp x\u00fac v\u1edbi th\u00e2n c\u00e2y \u0111\u01b0\u1ee3c \u0111\u1ec7m l\u00f3t \u0111\u1ec3 tr\u00e1nh x\u00e2y, x\u01b0\u1edbc ho\u1eb7c tr\u00f3c v\u1ecf c\u00e2y. S\u1eed d\u1ee5ng 1 ho\u1eb7c 2 t\u1ea7ng g\u00f4ng \u0111\u1ec3 li\u00ean k\u1ebft 4 c\u1ecdc ch\u1ed1ng; h\u00e0n ch\u1ebft ho\u1eb7c k\u1ebft h\u1ee3p \u0111\u1ec7m cao su c\u00f3 li\u00ean k\u1ebft bul\u00f4ng d\u1ec5 n\u1edbi l\u1ecfng khi c\u00e2y ph\u00e1t tri\u1ec3n.<\/p>\n

\u2013 Th\u01b0\u1eddng xuy\u00ean ki\u1ec3m tra b\u1ea3o d\u01b0\u1ee1ng \u0111\u1ed1i v\u1edbi c\u1ecdc s\u1eaft; thay th\u1ebf c\u1ecdc g\u1ed7 b\u1ecb g\u1eaby h\u1ecfng.<\/p>\n

B\u01b0\u1edbc 7:<\/em><\/strong>\u00a0Ch\u0103m s\u00f3c c\u00e2y sau khi tr\u1ed3ng:<\/p>\n

\u2013 K\u1ef9 thu\u1eadt ch\u0103m s\u00f3c c\u00e2y sau khi tr\u1ed3ng: Sau khi tr\u1ed3ng, \u0111\u01a1n v\u1ecb thi c\u00f4ng tr\u1ed3ng c\u00e2y c\u00f3 tr\u00e1ch nhi\u1ec7m ch\u0103m s\u00f3c, b\u1ea3o d\u01b0\u1ee1ng c\u00e2y t\u1ed1i thi\u1ec3u 03 th\u00e1ng tr\u01b0\u1edbc khi b\u00e0n giao cho \u0111\u01a1n v\u1ecb qu\u1ea3n l\u00fd, duy tr\u00ec c\u00e2y trong 02 n\u0103m \u0111\u1ea7u theo quy \u0111\u1ecbnh.<\/p>\n

\u2013 T\u01b0\u1edbi n\u01b0\u1edbc: T\u01b0\u1edbi \u0111\u1eabm \u0111\u1ea5t xung quanh g\u1ed1c c\u00e2y, th\u1eddi gian t\u01b0\u1edbi v\u00e0o s\u00e1ng s\u1edbm ho\u1eb7c chi\u1ec1u t\u1ed1i (kh\u00f4ng t\u01b0\u1edbi khi tr\u1eddi n\u1eafng g\u1eaft). T\u00f9y theo th\u1eddi ti\u1ebft v\u00e0 \u0111\u1ed9 \u1ea9m c\u1ee7a \u0111\u1ea5t \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh ch\u1ebf \u0111\u1ed9 t\u01b0\u1edbi, l\u01b0\u1ee3ng n\u01b0\u1edbc t\u01b0\u1edbi. Vi\u1ec7c t\u01b0\u1edbi n\u01b0\u1edbc kh\u00f4ng \u0111\u01b0\u1ee3c l\u00e0m x\u00f3i m\u00f2n \u0111\u1ea5t xung quanh g\u1ed1c nh\u01b0ng v\u1eabn t\u1ea1o \u0111\u1ee7 \u0111\u1ed9 \u1ea9m cho c\u00e2y.<\/p>\n

+ Th\u1eddi ch\u0103m s\u00f3c: 90 ng\u00e0y.<\/p>\n

+ S\u1ed1 l\u1ea7n t\u01b0\u1edbi:<\/p>\n

* 15 ng\u00e0y \u0111\u1ea7u t\u01b0\u1edbi li\u00ean t\u1ee5c: 1 ng\u00e0y\/1 l\u1ea7n.<\/p>\n

* 30 ng\u00e0y sau t\u01b0\u1edbi 2 ng\u00e0y\/l\u1ea7n.<\/p>\n

* C\u00e1c ng\u00e0y ti\u1ebfp theo (45 ng\u00e0y) t\u01b0\u1edbi trung b\u00ecnh: 3 ng\u00e0y \/l\u1ea7n.<\/p>\n

+ L\u01b0\u1ee3ng n\u01b0\u1edbc t\u01b0\u1edbi: 17 l\u00edt\/ l\u1ea7n t\u01b0\u1edbi.<\/p>\n

\u2013 Theo d\u00f5i t\u00ecnh h\u00ecnh ph\u00e1t tri\u1ec3n c\u1ee7a c\u00e2y \u0111\u1ec3 x\u1eed l\u00fd, n\u1ebfu ph\u00e1t hi\u1ec7n s\u00e2u b\u1ec7nh ph\u1ea3i phun thu\u1ed1c ngay, l\u00e0m c\u1ecf d\u1ea1i xung quanh g\u1ed1c c\u00e2y.<\/p>\n

\u2013 C\u1eaft t\u1ec9a c\u00e1c ch\u1ed3i, c\u00e0nh m\u1ecdc l\u00e0m l\u1ec7ch t\u00e1n \u0111\u1ec3 \u0111\u1ecbnh h\u01b0\u1edbng ph\u00e1t tri\u1ec3n t\u00e1n c\u00e2y c\u00e2n \u0111\u1ed1i.<\/p>\n

\u2013 Th\u01b0\u1eddng xuy\u00ean ki\u1ec3m tra c\u1ecdc ch\u1ed1ng v\u00e0 b\u1ed5 sung k\u1ecbp th\u1eddi cho c\u00e2y m\u1edbi tr\u1ed3ng, n\u1ebfu c\u00e2y nghi\u00eang ph\u1ea3i d\u1ef1ng l\u1ea1i ngay th\u1eb3ng.<\/p>\n

II. S\u00e2u b\u1ec7nh h\u1ea1i v\u00e0 bi\u1ec7n ph\u00e1p ph\u00f2ng tr\u1eeb :<\/strong><\/p>\n

    \n
  1. Con \u0110u\u00f4ng:<\/strong><\/li>\n<\/ol>\n

    \u00a0<\/strong>\u0110u\u00f4ng l\u00e0 c\u00f4n tr\u00f9ng g\u00e2y h\u1ea1i nguy hi\u1ec3m nh\u1ea5t b\u1edfi v\u00ec r\u1ea5t kh\u00f3 ph\u00e1t hi\u1ec7n khi n\u00f3 b\u1eaft \u0111\u1ea7u t\u1ea5n c\u00f4ng \u0111\u1ecdt non, \u0111\u1ebfn khi ph\u00e1t hi\u1ec7n ra th\u00ec \u0111\u1ec9nh sinh tr\u01b0\u1edfng \u0111\u00e3 b\u1ecb ph\u00e1 h\u1ee7y, c\u00e2y ch\u1ebft m\u00e0 kh\u00f4ng th\u1ec3 c\u1ee9u \u0111\u01b0\u1ee3c. Ngo\u00e0i ra, \u0111\u1ed1i v\u1edbi c\u00e2y c\u00f2n t\u01a1 hay c\u00e2y s\u1eafp v\u01b0\u01a1n l\u00f3ng \u0111u\u00f4ng c\u0169ng c\u00f3 th\u1ec5 t\u1ea5n c\u00f4ng \u1edf g\u1ed1c th\u00e2n.<\/p>\n

    \u00a0<\/strong>V\u00f2ng \u0111\u1eddi c\u1ee7a \u0111u\u00f4ng tr\u1ea3i qua 4 giai \u0111o\u1ea1n l\u00e0 tr\u1ee9ng, \u1ea5u tr\u00f9ng, nh\u1ed9ng v\u00e0 th\u00e0nh tr\u00f9ng. Trong \u0111\u00f3, ch\u1ec9 c\u00f3 \u1ea5u tr\u00f9ng g\u00e2y h\u1ea1i c\u00e2y.<\/p>\n

    – Tr\u1ee9ng:<\/strong>\u00a0M\u1ed9t con \u0111u\u00f4ng c\u00e1i c\u00f3 th\u1ec3 \u0111\u1ebb trung b\u00ecnh 240 tr\u1ee9ng, tr\u1ee9ng n\u1edf sau 3-5 ng\u00e0y. N\u00f3 \u0111\u1ebb tr\u1ee9ng tr\u00ean v\u1ebft n\u1ee9t, n\u01a1i b\u1ecb t\u1ed5n th\u01b0\u01a1ng c\u1ee7a th\u00e2n v\u00e0 ng\u1ecdn c\u00e2y g\u00e2y ra b\u1edfi con ng\u01b0\u1eddi, \u0111\u1ed9ng v\u1eadt kh\u00e1c ho\u1eb7c c\u00f4n tr\u00f9ng, v\u00ed d\u1ee5 nh\u01b0 ki\u1ebfn v\u01b0\u01a1ng… Tr\u1ee9ng c\u00f3 m\u00e0u kem v\u00e0 h\u01a1i d\u00e0i.<\/p>\n

    – \u1ea4u tr\u00f9ng:<\/strong>\u00a0Giai \u0111o\u1ea1n g\u00e2y h\u1ea1i c\u1ee7a \u0111u\u00f4ng. \u1ea4u tr\u00f9ng c\u00f3 m\u00e0u kem, \u0111\u00e0n h\u1ed3i v\u00e0 d\u00e0i, kh\u00f4ng ch\u00e2n v\u1edbi \u0111\u1ea7u m\u00e0u n\u00e2u. \u1ea4u tr\u00f9ng \u0103n c\u00e2y d\u1eeba \u0111\u1ec3 s\u1ed1ng trong v\u00f2ng 50 ng\u00e0y.<\/p>\n

    – Nh\u1ed9ng:<\/strong>\u00a0Nh\u1ed9ng n\u1eb1m trong 1 c\u00e1i k\u00e9n l\u00e0m b\u1eb1ng m\u00f4 g\u1ed7 d\u1eeba (ph\u1ea7n m\u1ec1m g\u1ea7n v\u1ecf c\u00e2y). Sau 19 ng\u00e0y ph\u00e1t tri\u1ec3n th\u00e0nh th\u00e0nh tr\u00f9ng.<\/p>\n

    – Th\u00e0nh tr\u00f9ng:<\/strong>\u00a0C\u00f3 m\u00e0u n\u00e2u h\u01a1i \u0111\u1ecf ho\u1eb7c m\u00e0u \u0111en. C\u00f3 m\u1ed9t c\u00e1i s\u1eebng d\u00e0i v\u1edbi m\u0169i s\u1eebng h\u01a1i cong xu\u1ed1ng. Th\u00e0nh tr\u00f9ng s\u1ed1ng \u0111u\u1ee3c 3-4 th\u00e1ng. V\u00f2ng \u0111\u1eddi c\u1ee7a \u0111u\u00f4ng l\u00e0 195 ng\u00e0y t\u1eeb tr\u1ee9ng \u0111\u1ebfn khi tr\u01b0\u1edfng th\u00e0nh<\/p>\n

    – Con \u0111u\u00f4ng tr\u01b0\u1edfng th\u00e0nh \u0111\u1ebb tr\u1ee9ng tr\u00ean th\u00e2n b\u1ecb th\u01b0\u01a1ng v\u00e0 tr\u00ean nh\u1eefng v\u1ebft n\u1ee9t c\u1ee7a th\u00e2n. Khi tr\u1ee9ng n\u1edf, \u1ea5u tr\u00f9ng kho\u00e9t nh\u1eefng l\u1ed5 nh\u1ecf tr\u00ean th\u00e2n ho\u1eb7c tr\u00ean ng\u1ecdn c\u00e2y. Ch\u00fang \u0103n theo m\u1ecdi h\u01b0\u1edbng th\u1eadm ch\u00ed kho\u00e9t nh\u1eefng l\u1ed5 l\u1edbn v\u00e0 s\u00e2u h\u01a1n. Khi \u1ea5u tr\u00f9ng b\u1eaft \u0111\u1ea7u t\u1ea5n c\u00f4ng v\u00e0 \u0103n \u0111\u1ecdt, nh\u1eefng l\u00e1 non b\u1eaft \u0111\u1ea7u h\u00e9o v\u00e0 ng\u00e3 xu\u1ed1ng, b\u00e1o hi\u1ec7u c\u00e2y d\u1eeba s\u1eafp ch\u1ebft.<\/p>\n

    * Bi\u1ec7n ph\u00e1p ph\u00f2ng tr\u1eeb:<\/strong><\/p>\n

    – Khi x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c nh\u1eefng \u0111i\u1ec3m t\u1ea5n c\u00f4ng c\u1ee7a \u0111u\u00f4ng tr\u00ean c\u00e2y. C\u00f3 th\u1ec3 ti\u1ebfn h\u00e0nh ph\u00f2ng tr\u1eeb b\u1eb1ng c\u00e1ch khoan s\u00e2u v\u00e0o th\u00e2n c\u00e2y kho\u1ea3ng 10-25cm h\u01b0\u1edbng l\u1ec7ch xu\u1ed1ng 15cm b\u00ean tr\u00ean v\u00f9ng b\u1ecb t\u1ea5n c\u00f4ng. C\u00f3 th\u1ec3 khoan 1- 2 l\u1ed5 \u1edf m\u1ed7i \u0111i\u1ec3m b\u1ecb \u0111u\u00f4ng t\u1ea5n c\u00f4ng. Sau \u0111\u00f3 cho v\u00e0o l\u1ed5 khoan c\u00e1c lo\u1ea1i thu\u1ed1c tr\u1eeb s\u00e2u nh\u01b0 Vibasu 10GR. B\u1ecbt k\u00edn l\u1ed7 l\u1ea1i b\u1eb1ng \u0111\u1ea5t s\u00e9t. Sau 3-4 ng\u00e0y, ki\u1ec3m tra hi\u1ec7u qu\u1ea3 c\u1ee7a thu\u1ed1c b\u1eb1ng c\u00e1ch k\u1ec1 tai v\u00e0o th\u00e2n, n\u1ebfu v\u1eabn nghe ti\u1ebfng r\u1ea1o r\u1ea1o v\u00e0 nh\u1ef1a m\u1edbi t\u1eeb th\u00e2n ti\u1ebfp t\u1ee5c ch\u1ea3y ra th\u00ec n\u00ean x\u1eed l\u00fd thu\u1ed1c l\u1ea1i l\u1ea7n hai, n\u1ebfu \u0111u\u00f4ng \u0111\u00e3 ch\u1ebft kh\u00f4ng c\u00f2n g\u00e2y h\u1ea1i th\u00ec c\u00f3 th\u1ec3 d\u00f9ng \u0111\u1ea5t s\u00e9t b\u1ecbt k\u00edn l\u1ed7 l\u1ea1i hay h\u00e0n k\u00edn c\u00e1c l\u1ed7 l\u1ea1i v\u0129nh vi\u1ec5n b\u1eb1ng m\u1ed9t m\u00e3nh g\u1ed7 c\u00f3 chi\u1ec1u r\u1ed9ng v\u00e0 chi\u1ec1u s\u00e2u h\u01a1i l\u1edbn h\u01a1n k\u00edch th\u01b0\u1edbc c\u1ee7a l\u1ed7. Th\u00eam v\u00e0o \u0111\u00f3 l\u1eafp c\u00e1c l\u1ed7 l\u1ea1i v\u00e0 s\u01a1n c\u00e1c v\u1ebft s\u1eb9o th\u00e2n b\u1eb1ng m\u1ed9t lo\u1ea1i b\u1ed9t than.<\/p>\n

    – Nh\u1eb1m ng\u0103n c\u1ea3n s\u1ef1 t\u1ea5n c\u00f4ng c\u1ee7a \u0111u\u00f4ng c\u1ea7n tr\u00e1nh nh\u1eefng t\u1ed5n th\u01b0\u01a1ng tr\u00ean th\u00e2n, l\u00e0 n\u01a1i t\u1ea1o ch\u1ed5 \u0111\u1ebb tr\u1ee9ng cho \u0111u\u00f4ng. D\u00f9ng b\u1ed9t than \u0111\u1ec3 s\u01a1n l\u00ean c\u00e1c v\u1ebft th\u01b0\u01a1ng c\u1ee7a c\u00e2y con. Ki\u1ec3m so\u00e1t ki\u1ebfn v\u01b0\u01a1ng b\u1edfi v\u00ec c\u00e1c \u0111i\u1ec3m t\u1ea5n c\u00f4ng c\u1ee7a ki\u1ebfn v\u01b0\u01a1ng c\u00f3 th\u1ec3 tr\u1edf th\u00e0nh n\u01a1i \u0111\u1ebb tr\u1ee9ng cho \u0111u\u00f4ng. \u0110\u1ed1n v\u00e0 \u0111\u1ed1t nh\u1eefng c\u00e2y d\u1eeba \u0111\u00e3 b\u1ecb \u1ea3nh h\u01b0\u1edfng n\u1eb7ng c\u1ee7a \u0111u\u00f4ng v\u00e0 gi\u1ebft nh\u1eefng c\u00f4n tr\u00f9ng \u1edf t\u1ea5t c\u1ea3 nh\u1eefng giai \u0111o\u1ea1n kh\u00e1c nhau. Th\u0103m v\u00e0 ki\u1ec3m tra th\u01b0\u1eddng xuy\u00ean \u0111\u1ec3 ph\u00e1t hi\u1ec7n k\u1ecbp th\u1eddi s\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a \u0111u\u00f4ng. B\u1eaft \u0111u\u00f4ng v\u00e0 c\u00e1c c\u00f4n tr\u00f9ng g\u00e2y h\u1ea1i kh\u00e1c \u1edf giai \u0111o\u1ea1n ph\u00e1 ho\u1ea1i ch\u1ee7 y\u1ebfu c\u1ee7a ch\u00fang v\u00e0 s\u01a1n ph\u1ee7 c\u00e1c v\u1ebft s\u01a1n b\u1eb1ng m\u1ed9t l\u1edbp b\u1ed9t than.<\/p>\n

    2.Ki\u1ebfn v\u01b0\u01a1ng :<\/strong><\/p>\n

    Ki\u1ebfn v\u01b0\u01a1ng l\u00e0 m\u1ed9t lo\u1ea1i c\u00f4n tr\u00f9ng ph\u1ed5 bi\u1ebfn v\u00e0 g\u00e2y thi\u1ec7t h\u1ea1i nhi\u1ec1u nh\u1ea5t cho c\u00e2y. Th\u00e0nh tr\u00f9ng t\u1ea5n c\u00f4ng c\u00e2y \u1edf \u0111\u1ee7 m\u1ecdi l\u1ee9a tu\u1ed5i, \u0103n c\u00e1c l\u00e1 non \u0111ang ph\u00e1t tri\u1ec3n, \u0111\u1ee5c v\u00e0o ch\u1ed3i, tr\u01b0\u1eddng h\u1ee3p n\u1eb7ng c\u00f3 th\u1ec3 g\u00e2y ch\u1ebft c\u00e2y.<\/p>\n

    Ki\u1ebfn v\u01b0\u01a1ng tr\u1ea3i qua 4 giai \u0111o\u1ea1n ph\u00e1t tri\u1ec3n: tr\u1ee9ng, \u1ea5u tr\u00f9ng, nh\u1ed9ng v\u00e0 th\u00e0nh tr\u00f9ng:<\/p>\n

    – Tr\u1ee9ng:<\/strong>\u00a0Ki\u1ebfn v\u01b0\u01a1ng \u0111\u1ebb tr\u1ee9ng trong nh\u1eefng th\u00e2n d\u1eeba v\u00e0 g\u1ed1c d\u1eeba m\u1ee5c, \u1ea9m, \u0111\u1ed1ng r\u00e1c, ph\u00e2n tr\u00e2u b\u00f2, r\u01a1m m\u1ee5c, th\u00e2n b\u1eafp, l\u00e1 m\u00eda\u2026 Tr\u1ee9ng c\u00f3 h\u00ecnh tr\u00f2n, m\u00e0u tr\u1eafng, c\u00f3 \u0111\u01b0\u1eddng k\u00ednh t\u1eeb 3-4mm. Sau 7-18 ng\u00e0y tr\u1ee9ng ph\u00e1t tri\u1ec3n th\u00e0nh \u1ea5u tr\u00f9ng.<\/p>\n

    – \u1ea4u tr\u00f9ng:<\/strong>\u00a0\u1ea4u tr\u00f9ng ki\u1ebfn v\u01b0\u01a1ng c\u00f3 m\u00e0u tr\u1eafng \u0111\u1ee5c, th\u01b0\u1eddng g\u1eadp cong th\u00e2n l\u1ea1i v\u1edbi \u0111\u1ea7u m\u00e0u n\u00e2u v\u00e0 mang 3 \u0111\u00f4i ch\u00e2n. \u1ea4u tr\u00f9ng ph\u00e1t tri\u1ec3n \u0111\u1ea7y \u0111\u1ee7 c\u00f3 k\u00edch th\u01b0\u1edbc t\u1eeb 60-105mm.<\/p>\n

    – Nh\u1ed9ng<\/strong>: Nh\u1ed9ng c\u00f3 m\u00e0u n\u00e2u nh\u1ea1t, \u0111\u01b0\u1ee3c bao ph\u1ee7 b\u1edfi m\u1ed9t c\u00e1i k\u00e9n l\u00e0m t\u1eeb \u0111\u1ea5t v\u00e0 x\u01a1 d\u1eeba. Nh\u1ed9ng ph\u00e1t tri\u1ec3n trong k\u00e9n t\u1eeb 14-29 ng\u00e0y.<\/p>\n

    – Th\u00e0nh tr\u00f9ng:<\/strong>\u00a0\u0110\u00e2y l\u00e0 giai \u0111o\u1ea1n g\u00e2y h\u1ea1i c\u1ee7a ki\u1ebfn v\u01b0\u01a1ng. Th\u00e0nh tr\u00f9ng c\u00f3 m\u00e0u \u0111en h\u01a1i n\u00e2u v\u1edbi 1 c\u00e1i s\u1eebng t\u01b0\u01a1ng \u0111\u1ed1i d\u00e0i \u1edf tr\u00ean \u0111\u1ea7u cong v\u1ec1 ph\u00eda sau. Th\u00e0nh tr\u00f9ng c\u00f3 th\u1ec3 s\u1ed1ng \u0111\u01b0\u1ee3c 4 th\u00e1ng. M\u1ed9t con c\u00e1i c\u00f3 th\u1ec3 \u0111\u1ebb t\u1eeb 70-140 tr\u1ee9ng. Ki\u1ebfn v\u01b0\u01a1ng th\u01b0\u1eddng \u0103n ch\u1ed3i v\u00e0 l\u00e1 ch\u01b0a t\u00e1ch trong b\u00f3 l\u00e1 ng\u1ecdn.<\/p>\n

    – \u0110\u1ed1i v\u1edbi c\u00e2y d\u01b0\u1edbi 1 n\u0103m tu\u1ed5i ki\u1ebfn v\u01b0\u01a1ng lu\u00f4n t\u1ea5n c\u00f4ng v\u00e0o g\u1ed1c c\u1ee7a c\u00e2y n\u01a1i th\u00e2n c\u00f2n \u0111\u1ee7 m\u1ec1m. Trong m\u1ed9t v\u00e0i tr\u01b0\u1eddng h\u1ee3p, ki\u1ebfn v\u01b0\u01a1ng c\u0169ng chui qua \u0111\u1ea5t \u0111\u1ec3 kho\u00e9t v\u00e0o th\u00e2n c\u00e2y. Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y c\u00f3 th\u1ec3 ph\u00f2ng b\u1eb1ng c\u00e1ch r\u1ea3i thu\u1ed1c tr\u1eeb s\u00e2u tr\u1ed9n v\u00e0o l\u1edbp \u0111\u1ea5t m\u1eb7t. \u0110\u1ed1i v\u1edbi c\u00e2y tr\u01b0\u1edfng th\u00e0nh ki\u1ebfn v\u01b0\u01a1ng t\u1ea5n c\u00f4ng v\u00e0o b\u00f3 l\u00e1 ng\u1ecdn v\u00e0 \u0111\u1ec9nh t\u0103ng tr\u01b0\u1edfng c\u1ee7a c\u00e2y.<\/p>\n

    * Bi\u1ec7n ph\u00e1p ph\u00f2ng tr\u1eeb:<\/strong><\/p>\n

    – V\u1ec7 sinh v\u01b0\u1eddn:<\/strong>\u00a0V\u1ec7 sinh c\u00e2y kh\u00f4ng \u0111\u1ec3 ch\u1ed5 cho ki\u1ebfn v\u01b0\u01a1ng g\u00e2y h\u1ea1i. Ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3, b\u1eaft b\u1eb1ng tay. D\u1ecdn d\u1eb9p ho\u1eb7c \u0111\u1ed1t nh\u1eefng \u0111\u1ed1ng r\u00e1c, th\u00e2n, l\u00e1 d\u1eeba hoai m\u1ee5c,.. kh\u00f4ng t\u1ea1o m\u00f4i tr\u01b0\u1eddng cho ki\u1ebfn v\u01b0\u01a1ng \u0111\u1ebb tr\u1ee9ng.<\/p>\n

    – Bi\u1ec7n ph\u00e1p sinh h\u1ecdc:\u00a0S\u1eed d\u1ee5ng<\/strong>\u00a0n\u1ea5m\u00a0Metarhizium anisopliae<\/em>\u00a0(Ometar 1.2 x 109<\/sup>\u00a0b\u00e0o t\u1eed\/g) k\u00fd sinh v\u00e0o c\u00f4n tr\u00f9ng.<\/p>\n

    – Bi\u1ec7n ph\u00e1p h\u00f3a h\u1ecdc:<\/strong><\/p>\n

    – \u00a0D\u00f9ng m\u1ea1t c\u01b0a tr\u1ed9n v\u1edbi Regent 0,3GR ho\u1eb7c Vibasu 10GR \u2026 r\u1ea3i l\u00ean c\u00e1c n\u00e1ch l\u00e1 \u0111\u1ecdt v\u00e0i th\u00e1ng m\u1ed9t l\u1ea7n.<\/p>\n

    – D\u00f9ng 1 \u0111o\u1ea1n l\u01b0\u1edbi c\u01b0\u1edbc (l\u01b0\u1edbi b\u00e9n) c\u1ee1 m\u1eaft l\u01b0\u1edbi 2 cm, d\u00e0i 3 m x r\u1ed9ng 0,6m, qu\u1ea5n k\u00edn kho\u1ea3ng 5-6 k\u1ebb b\u1eb9 l\u00e1 ng\u1ecdn, khi ki\u1ebfn v\u01b0\u01a1ng bay v\u00e0o s\u1ebd b\u1ecb v\u01b0\u1edbng l\u01b0\u1edbi ch\u1ebft.<\/p>\n

    – N\u1ebfu ph\u00e1t hi\u1ec7n c\u00f3 ki\u1ebfn v\u01b0\u01a1ng t\u1ea5n c\u00f4ng d\u1eeba, d\u00f9ng Regent, Vibasu k\u1ebft h\u1ee3p Aliette b\u01a1m v\u00e0o c\u00e1c l\u1ed7 \u0111\u1ee5c.<\/p>\n

     <\/p>\n

     <\/p>\n

    \u00a0<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

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