Tr\u00ean th\u1ebf gi\u1edbi c\u00f3 h\u01a1n m\u1ed9t tri\u1ec7u lo\u00e0i c\u00f4n tr\u00f9ng, trong \u0111\u00f3 c\u00f3 m\u1ed9t s\u1ed1 l\u00e0 c\u00f4n tr\u00f9ng c\u00f3 \u00edch cho ng\u01b0\u1eddi, nh\u01b0 t\u1eb1m nu\u00f4i v\u00e0 t\u1eb1m th\u1ea7u d\u1ea7u. Nh\u1eefng c\u00f4n tr\u00f9ng c\u00f3 \u00edch n\u00e0y \u0111\u01b0\u1ee3c con ng\u01b0\u1eddi ngh\u0129 c\u00e1ch nu\u00f4i d\u01b0\u1ee1ng, \u0111\u1ec3 cho ch\u00fang nh\u1ea3 nhi\u1ec1u t\u01a1 h\u01a1n, \u1ee7 nhi\u1ec1u m\u1eadt h\u01a1n\u2026 Nh\u01b0ng \u0111\u1ea1i \u0111a s\u1ed1 c\u00f4n tr\u00f9ng l\u00e0 lo\u1ea1i c\u00f3 h\u1ea1i cho ng\u01b0\u1eddi, ch\u00fang ta ch\u1ec9 c\u1ea7n quan s\u00e1t k\u0129 s\u1ebd ph\u00e1t hi\u1ec7n ra c\u00f3 lo\u1ea1i s\u00e2u \u0103n l\u00e1 rau, c\u00f3 lo\u1ea1i h\u00fat d\u1ecbch c\u1ee7a g\u1ea1o, l\u00faa m\u00ec, c\u00f3 lo\u1ea1i l\u00e0m m\u1ecdt th\u00e2n c\u1ee7a c\u00e2y g\u1ed7, c\u00f3 lo\u1ea1i chui d\u00ednh v\u00e0o trong qu\u1ea3 \u0103n th\u1ecbt qu\u1ea3 ho\u1eb7c \u0103n h\u1ea1t trong qu\u1ea3, c\u00f2n c\u00f3 lo\u1ea1i h\u00fat m\u00e1u c\u1ee7a ng\u01b0\u1eddi v\u00e0 c\u1ee7a \u0111\u1ed9ng v\u1eadt, truy\u1ec1n nhi\u1ec5m b\u1ec7nh t\u1eadt\u2026 Nh\u1eefng c\u00f4n tr\u00f9ng c\u00f3 h\u1ea1i n\u00e0y kh\u00f4ng nh\u1eefng nguy hi\u1ec3m cho ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 s\u1ea3n l\u01b0\u1ee3ng c\u00e2y n\u00f4ng nghi\u1ec7p, m\u00e0 c\u00f2n nguy h\u1ea1i cho s\u1ee9c kh\u1ecfe c\u1ee7a con ng\u01b0\u1eddi v\u00e0 s\u00fac v\u1eadt. Hi\u1ec7n nay, ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn ph\u00f2ng tr\u1eeb s\u00e2u b\u1ec7nh l\u00e0 phun thu\u1ed1c tr\u1eeb s\u00e2u nh\u01b0ng t\u1ea1i sao h\u00e0ng n\u0103m ch\u00fang ta phun thu\u1ed1c tr\u1eeb s\u00e2u m\u00e0 v\u1eabn c\u00f2n c\u00f4n tr\u00f9ng g\u00e2y h\u1ea1i? Ch\u1ee7 y\u1ebfu c\u00f3 m\u1ea5y nguy\u00ean nh\u00e2n d\u01b0\u1edbi \u0111\u00e2y.<\/p>\n\n\n\n
M\u1ed9t l\u00e0 ch\u1ee7ng lo\u1ea1i c\u00f4n tr\u00f9ng r\u1ea5t nhi\u1ec1u, v\u00ed d\u1ee5 nh\u01b0 lo\u1ea1i c\u00f4n tr\u00f9ng g\u00e2y h\u1ea1i cho c\u00e2y n\u00f4ng nghi\u1ec7p, kh\u00f4ng nh\u1eefng c\u00e1c lo\u1ea1i hoa m\u00e0u c\u00f3 nh\u1eefng lo\u1ea1i c\u00f4n tr\u00f9ng kh\u00e1c nhau m\u00e0 tr\u00ean c\u00f9ng m\u1ed9t lo\u1ea1i hoa m\u00e0u c\u0169ng c\u00f3 nhi\u1ec1u lo\u1ea1i c\u00f4n tr\u00f9ng g\u00e2y h\u1ea1i; v\u00ed d\u1ee5, trong m\u1ed9t \u0111\u1eddi c\u00e2y l\u00faa n\u01b0\u1edbc c\u00f3 m\u01b0\u1eddi m\u1ea5y lo\u1ea1i c\u00f4n tr\u00f9ng g\u00e2y h\u1ea1i, phun thu\u1ed1c n\u00f4ng nghi\u1ec7p th\u01b0\u1eddng ch\u1ec9 c\u00f3 th\u1ec3 ph\u00f2ng tr\u1eeb m\u1ed9t s\u1ed1 \u00edt lo\u1ea1i c\u00f4n tr\u00f9ng, ch\u1ee9 kh\u00f4ng th\u1ec3 tr\u1ecb h\u1ebft t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n
Th\u1ee9 hai, c\u00f4n tr\u00f9ng c\u00f3 s\u1ee9c sinh s\u00f4i r\u1ea5t m\u1ea1nh. C\u00f3 lo\u1ea1i c\u00f4n tr\u00f9ng m\u1ed9t n\u0103m c\u00f3 th\u1ec3 sinh s\u00f4i m\u1ea5y \u0111\u1eddi, c\u00f3 lo\u1ea1i sinh s\u00f4i m\u01b0\u1eddi m\u1ea5y \u0111\u1eddi, th\u1eadm ch\u00ed m\u1ea5y ch\u1ee5c \u0111\u1eddi. \u1ede \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng th\u00edch h\u1ee3p, m\u1ed9t con c\u00f4n tr\u00f9ng c\u00e1i c\u00f3 th\u1ec3 sinh s\u1ea3n m\u1ea5y tr\u0103m \u0111\u1ebfn h\u00e0ng ngh\u00ecn \u0111\u1eddi sau. V\u00ec v\u1eady, sau khi phun thu\u1ed1c, s\u1ed1 l\u01b0\u1ee3ng s\u1ed1 c\u00f4n tr\u00f9ng may m\u1eafn s\u1ed1ng s\u00f3t kh\u00f4ng nhi\u1ec1u, nh\u01b0ng sau m\u1ed9t th\u1eddi gian sinh s\u00f4i, s\u1ed1 l\u01b0\u1ee3ng ng\u00e0y c\u00e0ng t\u0103ng.<\/p>\n\n\n\n
Th\u1ee9 ba, c\u00f4n tr\u00f9ng c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng l\u1ea1i nh\u1eefng m\u00f4i tr\u01b0\u1eddng kh\u00f4ng t\u1ed1t v\u00e0 c\u00f3 t\u00ednh kh\u00e1ng thu\u1ed1c. M\u1ed9t \u0111\u1eddi c\u1ee7a c\u00f4n tr\u00f9ng, c\u00f3 con ph\u1ea3i tr\u1ea3i qua tr\u1ee9ng, \u1ea5u tr\u00f9ng, nh\u1ed9ng, c\u00f4n tr\u00f9ng, c\u00f3 lo\u1ea1i tr\u1ea3i qua qu\u00e1 tr\u00ecnh bi\u1ebfn th\u00e1i t\u1eeb tr\u1ee9ng sang ch\u00e2u ch\u1ea5u, c\u00f4n tr\u00f9ng tr\u01b0\u1edfng th\u00e0nh. Hi\u1ec7n nay, thu\u1ed1c di\u1ec7t s\u00e2u th\u01b0\u1eddng d\u00f9ng ch\u1ec9 c\u00f3 th\u1ec3 l\u00e0m ch\u1ebft ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u1ea5u tr\u00f9ng, ch\u00e2u ch\u1ea5u v\u00e0 c\u00f4n tr\u00f9ng, c\u00f2n \u0111\u1ed1i v\u1edbi tr\u1ee9ng v\u00e0 nh\u1ed9ng kh\u00f4ng \u0103n kh\u00f4ng \u0111\u1ed9ng tr\u00ean b\u1ec1 m\u1eb7t th\u00ec hi\u1ec7u qu\u1ea3 kh\u00f4ng l\u00ed t\u01b0\u1edfng. M\u00e0 \u0111\u1ed1i v\u1edbi c\u00f4n tr\u00f9ng tr\u01b0\u1edfng th\u00e0nh, ch\u00e2u ch\u1ea5u v\u00e0 \u1ea5u tr\u00f9ng, hi\u1ec7u qu\u1ea3 ph\u00f2ng tr\u1ecb ch\u1ec9 c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c 90%, 10% nh\u1eefng c\u00f4n tr\u00f9ng may m\u1eafn s\u1ed1ng s\u00f3t, \u0111\u1eddi sau ch\u00fang sinh s\u00f4i, c\u00f3 th\u1ec3 s\u1ea3n sinh ra t\u00ednh th\u00edch \u1ee9ng v\u1edbi thu\u1ed1c tr\u1eeb s\u00e2u, t\u00ednh kh\u00e1ng thu\u1ed1c.<\/p>\n\n\n\n
V\u00ed d\u1ee5 \u0111\u1ed1i v\u1edbi lo\u00e0i s\u00e2u h\u1ea1i l\u00faa nh\u01b0 r\u1eadn bay l\u00faa, ve l\u00e1 l\u00faa, m\u1ed7i m\u1eabu d\u00f9ng 75 g thu\u1ed1c n\u00f4ng nghi\u1ec7p malathion v\u00e0 \u0111\u1ea1t hi\u1ec7u qu\u1ea3 ph\u00f2ng tr\u1ecb l\u00e0 95%, sau m\u1ea5y n\u0103m li\u00ean ti\u1ebfp d\u00f9ng thu\u1ed1c, m\u1ed7i m\u1eabu c\u0169ng d\u00f9ng 100 g thu\u1ed1c, th\u00ec hi\u1ec7u qu\u1ea3 ch\u1ec9 \u0111\u1ea1t kho\u1ea3ng 50%. H\u01a1n n\u1eefa nh\u1eefng n\u01a1i m\u00e0 d\u00f9ng thu\u1ed1c n\u00f4ng nghi\u1ec7p c\u00e0ng l\u00e2u v\u00e0 l\u01b0\u1ee3ng thu\u1ed1c c\u00e0ng t\u0103ng th\u00ec t\u00ednh kh\u00e1ng thu\u1ed1c c\u1ee7a c\u00f4n tr\u00f9ng c\u00e0ng r\u00f5 r\u1ec7t.<\/p>\n\n\n\n
C\u00f3 lo\u00e0i c\u00f4n tr\u00f9ng, tr\u1ee9ng tr\u00f9ng, ch\u00e2u ch\u1ea5u ho\u1eb7c \u1ea5u tr\u00f9ng, \u1edf nhi\u1ec7t \u0111\u1ed9 kho\u1ea3ng -15oC kh\u00f4ng ch\u1ebft c\u00f3ng; c\u00f3 lo\u1ea1i \u1ea5u tr\u00f9ng, ch\u00e2u ch\u1ea5u m\u1ea5y th\u00e1ng kh\u00f4ng \u0103n c\u0169ng kh\u00f4ng ch\u1ebft \u0111\u00f3i, \u0111i\u1ec1u n\u00e0y ch\u1ee9ng t\u1ecf s\u1ee9c ch\u1ecbu l\u1ea1nh, ch\u1ecbu \u0111\u00f3i c\u1ee7a ch\u00fang r\u1ea5t kh\u1ecfe, cho n\u00ean c\u00f3 th\u1ec3 an to\u00e0n qua m\u00f9a \u0111\u00f4ng gi\u00e1 l\u1ea1nh.<\/p>\n\n\n\n
Th\u1ee9 t\u01b0, c\u00f3 m\u1ed9t s\u1ed1 c\u00f4n tr\u00f9ng n\u00f4ng nghi\u1ec7p c\u00f3 kh\u1ea3 n\u0103ng bay r\u1ea5t xa. M\u1ed7i khi \u0111\u1ebfn m\u00f9a xu\u00e2n, m\u00f9a h\u1ea1, c\u00e1c c\u00e2y tr\u1ed3ng \u1edf ph\u00eda B\u1eafc nh\u01b0 l\u00faa sinh tr\u01b0\u1edfng d\u1ed3i d\u00e0o, th\u1ee9c \u0103n phong ph\u00fa, c\u00f4n tr\u00f9ng g\u00e2y h\u1ea1i t\u1eeb Nam l\u00ean B\u1eafc, m\u1ed7i n\u0103m khi cu\u1ed1i thu \u0111\u1ea7u \u0111\u00f4ng, nhi\u1ec7t \u0111\u1ed9 gi\u1ea3m, sau khi thu ho\u1ea1ch c\u00e2y tr\u1ed3ng n\u00f4ng nghi\u1ec7p, m\u1ed9t s\u1ed1 c\u00f4n tr\u00f9ng g\u00e2y h\u1ea1i l\u1ea1i di c\u01b0 t\u1eeb B\u1eafc v\u00e0o Nam g\u00e2y h\u1ea1i.<\/p>\n\n\n\n
Th\u1ee9 n\u0103m, phun thu\u1ed1c di\u1ec7t s\u00e2u b\u1ecd th\u01b0\u1eddng r\u1ea5t nguy h\u1ea1i \u0111\u1ebfn thi\u00ean \u0111\u1ecbch c\u1ee7a c\u00f4n tr\u00f9ng. Thi\u00ean \u0111\u1ecbch c\u1ee7a c\u00f4n tr\u00f9ng l\u1ea1i l\u00e0 ng\u01b0\u1eddi b\u1ea1n c\u1ee7a con ng\u01b0\u1eddi. Ch\u1ee7ng lo\u1ea1i thi\u00ean \u0111\u1ecbch r\u1ea5t nhi\u1ec1u nh\u01b0 \u1ebfch, nh\u1ec7n, b\u01b0\u1edbm k\u00ed sinh, ru\u1ed3i k\u00ed sinh, tr\u00f9ng tuy\u1ebfn\u2026 khi phun thu\u1ed1c tr\u1eeb s\u00e2u m\u1eb7c d\u00f9 gi\u1ebft h\u1ea1i c\u00f4n tr\u00f9ng g\u00e2y h\u1ea1i nh\u01b0ng c\u0169ng \u0111\u1ed3ng th\u1eddi gi\u1ebft ch\u1ebft l\u01b0\u1ee3ng l\u1edbn thi\u00ean \u0111\u1ecbch. M\u00e0 s\u1ee9c sinh s\u00f4i c\u1ee7a thi\u00ean \u0111\u1ecbch l\u1ea1i th\u1ea5p h\u01a1n c\u00f4n tr\u00f9ng g\u00e2y h\u1ea1i nhi\u1ec1u, n\u1ebfu kh\u00f4ng n\u1eafm v\u1eefng t\u00ecnh h\u00ecnh ph\u00e1t tri\u1ec3n c\u1ee7a thi\u00ean \u0111\u1ecbch v\u00e0 ph\u1ea3n \u1ee9ng c\u1ee7a thi\u00ean \u0111\u1ecbch v\u1edbi thu\u1ed1c tr\u1eeb s\u00e2u, d\u00f9ng thu\u1ed1c kh\u00f4ng ph\u00f9 h\u1ee3p s\u1ebd g\u00e2y h\u1ea1i h\u01a1n, ng\u01b0\u1ee3c l\u1ea1i s\u1ebd g\u00e2y nguy h\u1ea1i h\u01a1n.<\/p>\n\n\n\n
Do nh\u1eefng nguy\u00ean nh\u00e2n tr\u00ean, m\u1eb7c d\u00f9 h\u00e0ng n\u0103m phun thu\u1ed1c tr\u1eeb s\u00e2u, c\u00f4n tr\u00f9ng g\u00e2y h\u1ea1i v\u1eabn kh\u00f4ng ng\u1eebng sinh s\u00f4i. Phun thu\u1ed1c ch\u1eb3ng qua l\u00e0 m\u1ee9c kh\u1ed1ng ch\u1ebf c\u00f4n tr\u00f9ng g\u00e2y h\u1ea1i tr\u01b0\u1edbc khi c\u00f4n tr\u00f9ng ch\u01b0a l\u00e0m cho c\u00e2y b\u1ecb t\u1ed5n h\u1ea1i m\u00e0 th\u00f4i.<\/p>\n","protected":false},"excerpt":{"rendered":"
Tr\u00ean th\u1ebf gi\u1edbi c\u00f3 h\u01a1n m\u1ed9t tri\u1ec7u lo\u00e0i c\u00f4n tr\u00f9ng, trong \u0111\u00f3 c\u00f3 m\u1ed9t s\u1ed1 l\u00e0 c\u00f4n tr\u00f9ng c\u00f3 \u00edch cho ng\u01b0\u1eddi, nh\u01b0 t\u1eb1m nu\u00f4i v\u00e0 t\u1eb1m th\u1ea7u d\u1ea7u. Nh\u1eefng c\u00f4n tr\u00f9ng c\u00f3 \u00edch n\u00e0y \u0111\u01b0\u1ee3c con ng\u01b0\u1eddi ngh\u0129 c\u00e1ch nu\u00f4i d\u01b0\u1ee1ng, \u0111\u1ec3 cho ch\u00fang nh\u1ea3 nhi\u1ec1u t\u01a1 h\u01a1n, \u1ee7 nhi\u1ec1u m\u1eadt h\u01a1n\u2026 Nh\u01b0ng \u0111\u1ea1i […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15,19],"tags":[],"class_list":["post-9806","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-tu-nhien"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/9806","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=9806"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/9806\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=9806"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=9806"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=9806"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}