{"id":7803,"date":"2021-11-20T15:25:42","date_gmt":"2021-11-20T08:25:42","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=7803"},"modified":"2021-11-20T17:13:07","modified_gmt":"2021-11-20T10:13:07","slug":"vi-sao-hoa-chat-diet-co-lai-diet-duoc-co-dai","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/vi-sao-hoa-chat-diet-co-lai-diet-duoc-co-dai\/","title":{"rendered":"V\u00ec sao ho\u00e1 ch\u1ea5t di\u1ec7t c\u1ecf l\u1ea1i di\u1ec7t \u0111\u01b0\u1ee3c c\u1ecf d\u1ea1i?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u1ede th\u00f4n qu\u00ea, n\u1ebfu ch\u1ec9 d\u1ef1a v\u00e0o s\u1ee9c ng\u01b0\u1eddi \u0111\u1ec3 tr\u1eeb c\u1ecf th\u00ec \u0111\u00f3 l\u00e0 vi\u1ec7c h\u1ebft s\u1ee9c gian kh\u1ed5. So v\u1edbi c\u00e2y l\u01b0\u01a1ng th\u1ef1c th\u00ec c\u1ecf d\u1ea1i c\u00f3 s\u1ee9c s\u1ed1ng m\u1ea1nh h\u01a1n nhi\u1ec1u, kh\u00f4ng d\u1ec5 m\u00e0 tr\u1eeb di\u1ec7t \u0111\u01b0\u1ee3c. Khi d\u00f9ng b\u1eeba c\u1ecf, n\u1ebfu kh\u00f4ng c\u1ea9n th\u1eadn c\u00f3 th\u1ec3 g\u00e2y t\u1ed5n h\u1ea1i cho c\u00e2y l\u00faa. Ngo\u00e0i ra t\u1ed1c \u0111\u1ed9 sinh tr\u01b0\u1edfng c\u1ee7a c\u1ecf d\u1ea1i r\u1ea5t l\u1edbn, trong khi \u0111\u00f3 th\u00ec t\u1eeb khi gieo h\u1ea1t l\u00faa \u0111\u1ebfn khi thu ho\u1ea1ch m\u00f9a m\u00e0ng, ng\u01b0\u1eddi n\u00f4ng d\u00e2n bu\u1ed9c ph\u1ea3i t\u00ecm c\u00e1ch h\u1ea1n ch\u1ebf c\u1ecf d\u1ea1i, mong thu ho\u1ea1ch \u0111\u01b0\u1ee3c t\u1ed1t h\u01a1n, \u0111\u00f3 l\u00e0 vi\u1ec7c l\u00e0m kh\u00f4ng d\u1ec5.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu d\u00f9ng ho\u00e1 ch\u1ea5t di\u1ec7t c\u1ecf th\u00ec t\u00ecnh h\u00ecnh c\u00f3 th\u1ec3 kh\u00e1c \u0111i. V\u00ed d\u1ee5 n\u1ebfu cho h\u1ee3p ch\u1ea5t propanil (t\u00ean ho\u00e1 h\u1ecdc l\u00e0 diclo propianyl anilit, vi\u1ebft t\u1eaft l\u00e0 DCPA) v\u00e0o ru\u1ed9ng l\u00faa n\u01b0\u1edbc, th\u00ec c\u00f3 th\u1ec3 di\u1ec7t \u0111\u01b0\u1ee3c c\u00e1c lo\u1ea1i c\u1ecf d\u1ea1i trong ru\u1ed9ng l\u00faa nh\u01b0: l\u00faa ma, tr\u1ea1ch t\u1ea3, c\u1ecf voi, c\u1ecf tai l\u1eeba v\u00e0 c\u00e1c lo\u1ea1i c\u1ecf t\u1ea1p kh\u00e1c\u2026 m\u00e0 kh\u00f4ng g\u00e2y h\u1ea1i cho l\u00faa. N\u1ebfu phun v\u00e0o ru\u1ed9ng l\u00faa, b\u00f4ng, v\u01b0\u1eddn rau lo\u1ea1i thu\u1ed1c ch\u1ee9a este di\u1ec7t c\u1ecf th\u00ec c\u00e1c m\u1ea7m c\u1ecf d\u1ea1i s\u1ebd kh\u00f4ng m\u1ecdc l\u00ean \u0111\u01b0\u1ee3c. Nh\u1edd s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a khoa h\u1ecdc, c\u00e1c nh\u00e0 ho\u00e1 h\u1ecdc \u0111\u00e3 nghi\u00ean c\u1ee9u ch\u1ebf t\u1ea1o \u0111\u01b0\u1ee3c nhi\u1ec1u lo\u1ea1i thu\u1ed1c di\u1ec7t c\u1ecf d\u1ea1i c\u00f3 hi\u1ec7u qu\u1ea3 cao, l\u1ea1i \u00edt c\u00f3 t\u00e1c d\u1ee5ng ph\u1ee5 c\u00f3 h\u1ea1i. C\u00e1c lo\u1ea1i thu\u1ed1c di\u1ec7t c\u1ecf n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i cho c\u00e1c lo\u1ea1i ru\u1ed9ng kh\u00f4, ru\u1ed9ng n\u01b0\u1edbc, v\u01b0\u1eddn rau xanh, v\u01b0\u1eddn tr\u00e1i c\u00e2y.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Thu\u1ed1c di\u1ec7t c\u1ecf ho\u00e1 h\u1ecdc c\u00f3 th\u1ec3 di\u1ec7t \u0111\u01b0\u1ee3c c\u1ecf do c\u00f3 th\u1ec3 c\u00f3 c\u00e1c t\u00e1c d\u1ee5ng: T\u00e1c d\u1ee5ng \u1ee9c ch\u1ebf qu\u00e1 tr\u00ecnh h\u00f4 h\u1ea5p c\u1ee7a c\u1ecf d\u1ea1i, c\u1eaft \u0111\u1ee9t c\u00e1c qu\u00e1 tr\u00ecnh sinh l\u00fd c\u1ee7a c\u1ecf d\u1ea1i, khi\u1ebfn c\u1ecf d\u1ea1i b\u1ecb ch\u1ebft ng\u1ea1t; ch\u1ea5t di\u1ec7t c\u1ecf c\u00f3 th\u1ec3 \u1ee9c ch\u1ebf qu\u00e1 tr\u00ecnh quang h\u1ee3p, ng\u0103n c\u1ea3n s\u1ef1 h\u00ecnh th\u00e0nh ch\u1ea5t dinh d\u01b0\u1ee1ng l\u00e0m qu\u00e1 tr\u00ecnh trao \u0111\u1ed5i ch\u1ea5t c\u1ee7a c\u1ecf d\u1ea1i b\u1ecb \u0111\u00ecnh tr\u1ec7, do \u0111\u00f3 h\u1ea1n ch\u1ebf s\u1ef1 sinh tr\u01b0\u1edfng c\u1ee7a c\u1ecf d\u1ea1i. Ch\u1ea5t di\u1ec7t c\u1ecf d\u1ea1i c\u00f3 th\u1ec3 ph\u00e1 ho\u1ea1i \u0111\u01b0\u1eddng d\u1eabn c\u00e1c ch\u1ea5t h\u1eefu c\u01a1 c\u0169ng nh\u01b0 d\u1eabn n\u01b0\u1edbc trong c\u1ecf d\u1ea1i, ng\u0103n c\u1ea3n s\u1ef1 l\u01b0u th\u00f4ng b\u00ecnh th\u01b0\u1eddng trong c\u1ecf d\u1ea1i, l\u00e0m b\u1ed9 ph\u1eadn ph\u00eda tr\u00ean c\u1ee7a c\u1ecf d\u1ea1i kh\u00f4ng nh\u1eadn \u0111\u01b0\u1ee3c n\u01b0\u1edbc, b\u1ed9 ph\u1eadn ph\u00eda d\u01b0\u1edbi kh\u00f4ng nh\u1eadn \u0111\u01b0\u1ee3c c\u00e1c ch\u1ea5t dinh d\u01b0\u1ee1ng, l\u00e0m cho c\u1ecf d\u1ea1i b\u1ecb &#8220;ch\u1ebft kh\u00e1t&#8221;, &#8220;ch\u1ebft \u0111\u00f3i&#8221;.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D\u1ef1a v\u00e0o t\u00ednh n\u0103ng di\u1ec7t c\u1ecf ng\u01b0\u1eddi ta chia thu\u1ed1c di\u1ec7t c\u1ecf l\u00e0m hai lo\u1ea1i l\u1edbn: M\u1ed9t lo\u1ea1i c\u00f3 &#8220;t\u00ednh di\u1ec7t s\u1ea1ch&#8221; nh\u01b0 5 &#8211; clopheonolat natri, ho\u00e1 ch\u1ea5t l\u00e0m r\u1ee5ng l\u00e1. C\u00e1c lo\u1ea1i thu\u1ed1c di\u1ec7t c\u1ecf n\u00e0y c\u00f3 th\u1ec3 di\u1ec7t h\u1ebft c\u00e1c lo\u1ea1i c\u1ecf d\u1ea1i, th\u00edch h\u1ee3p cho vi\u1ec7c di\u1ec7t c\u1ecf tr\u01b0\u1edbc khi gieo tr\u1ed3ng. M\u1ed9t lo\u1ea1i thu\u1ed1c di\u1ec7t c\u1ecf kh\u00e1c c\u00f3 t\u00ednh ch\u1ecdn l\u1ecdc: V\u1edbi lo\u1ea1i thu\u1ed1c di\u1ec7t c\u1ecf n\u00e0y c\u00f3 th\u1ec3 c\u00f3 t\u00e1c d\u1ee5ng di\u1ec7t ch\u1ecdn l\u1ecdc m\u1ed9t lo\u1ea1i th\u1ef1c v\u1eadt n\u00e0y (c\u1ecf d\u1ea1i) nh\u01b0ng l\u1ea1i an to\u00e0n cho lo\u1ea1i th\u1ef1c v\u1eadt kh\u00e1c (lo\u1ea1i c\u00e2y tr\u1ed3ng). Nh\u01b0 lo\u1ea1i thu\u1ed1c propanil c\u00f3 th\u1ec3 di\u1ec7t l\u00faa ma v\u00e0 nhi\u1ec1u lo\u1ea1i c\u1ecf d\u1ea1i nh\u01b0ng l\u1ea1i an to\u00e0n cho c\u00e2y l\u00faa n\u01b0\u1edbc. Ngo\u00e0i ra c\u00e1c ph\u01b0\u01a1ng th\u1ee9c s\u1eed d\u1ee5ng thu\u1ed1c di\u1ec7t c\u1ecf c\u0169ng kh\u00e1c nhau: C\u00f3 lo\u1ea1i d\u00f9ng \u0111\u1ec3 di\u1ec7t c\u00e1c lo\u1ea1i c\u1ecf \u0111\u00e3 tr\u01b0\u1edfng th\u00e0nh, c\u00f3 lo\u1ea1i chuy\u00ean d\u00f9ng \u0111\u1ec3 di\u1ec7t c\u00e1c m\u1ea7m, h\u1ea1t gi\u1ed1ng c\u1ecf d\u1ea1i, ch\u1ee7 y\u1ebfu \u0111\u1ec3 di\u1ec7t c\u1ecf d\u1ea1i \u1edf d\u1ea1ng m\u1ea7m non. V\u00ec v\u1eady tr\u01b0\u1edbc khi d\u00f9ng thu\u1ed1c di\u1ec7t c\u1ecf c\u1ea7n xem x\u00e9t c\u00e1c nh\u00e2n t\u1ed1 di\u1ec7t c\u1ecf, \u0111i\u1ec1u ki\u1ec7n s\u1eed d\u1ee5ng m\u00e0 ch\u1ecdn l\u1ecdc thu\u1ed1c di\u1ec7t c\u1ecf d\u1ea1i th\u00edch h\u1ee3p cho m\u00f9a m\u00e0ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1eeb kho\u00e1: Thu\u1ed1c di\u1ec7t c\u1ecf.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>\u1ede th\u00f4n qu\u00ea, n\u1ebfu ch\u1ec9 d\u1ef1a v\u00e0o s\u1ee9c ng\u01b0\u1eddi \u0111\u1ec3 tr\u1eeb c\u1ecf th\u00ec \u0111\u00f3 l\u00e0 vi\u1ec7c h\u1ebft s\u1ee9c gian kh\u1ed5. So v\u1edbi c\u00e2y l\u01b0\u01a1ng th\u1ef1c th\u00ec c\u1ecf d\u1ea1i c\u00f3 s\u1ee9c s\u1ed1ng m\u1ea1nh h\u01a1n nhi\u1ec1u, kh\u00f4ng d\u1ec5 m\u00e0 tr\u1eeb di\u1ec7t \u0111\u01b0\u1ee3c. Khi d\u00f9ng b\u1eeba c\u1ecf, n\u1ebfu kh\u00f4ng c\u1ea9n th\u1eadn c\u00f3 th\u1ec3 g\u00e2y t\u1ed5n h\u1ea1i cho c\u00e2y [&hellip;]<\/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":[8,15],"tags":[],"class_list":["post-7803","post","type-post","status-publish","format-standard","hentry","category-hoa-hoc","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7803","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=7803"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7803\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=7803"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=7803"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=7803"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}