{"id":8577,"date":"2009-03-24T02:17:53","date_gmt":"2009-03-23T19:17:53","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2009\/03\/ket-qua-ban-dau-ve-dieu-tra-danh-gia-muc-do-hai-cua-sau-duc-non-hypsipyla-robusta-tren-mot-so-xuat-xu-cay-lat\/"},"modified":"2019-09-25T10:23:02","modified_gmt":"2019-09-25T03:23:02","slug":"ket-qua-ban-dau-ve-dieu-tra-danh-gia-muc-do-hai-cua-sau-duc-non-hypsipyla-robusta-tren-mot-so-xuat-xu-cay-lat","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/ket-qua-ban-dau-ve-dieu-tra-danh-gia-muc-do-hai-cua-sau-duc-non-hypsipyla-robusta-tren-mot-so-xuat-xu-cay-lat\/","title":{"rendered":"K\u1ebft qu\u1ea3 ban \u0111\u1ea7u v\u1ec1 \u0111i\u1ec1u tra \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 h\u1ea1i c\u1ee7a s\u00e2u \u0111\u1ee5c n\u00f5n Hypsipyla robusta tr\u00ean m\u1ed9t s\u1ed1 xu\u1ea5t x\u1ee9 c\u00e2y l\u00e1t."},"content":{"rendered":"

Nguy\u1ec5n V\u0103n \u0110\u1ed9, \u0110\u00e0o Ng\u1ecdc Quang<\/em><\/strong><\/p>\n

Ph\u00f2ng Nghi\u00ean c\u1ee9u B\u1ea3o v\u1ec7 r\u1eebng<\/em><\/p>\n

Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/em><\/p>\n

L\u00e1t hoa Chukrasia tabularis<\/em> A. Juss. thu\u1ed9c h\u1ecd Xoan (Meliaceae<\/em>)l\u00e0 lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba, ph\u00e2n b\u1ed1 tr\u00ean nhi\u1ec1u v\u00f9ng sinh th\u00e1i \u1edf n\u01b0\u1edbc ta. G\u1ed7 c\u1ee7a c\u00e2y l\u00e1t hoa (g\u1ed7 l\u00e1t) b\u1ec1n, c\u00f3 v\u00e2n g\u1ed7 v\u00e0 m\u1ea7u s\u1eafc \u0111\u1eb9p, l\u1ea1i kh\u00f4ng b\u1ecb m\u1ed1i m\u1ecdt n\u00ean th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 l\u00e0m \u0111\u1ed7 g\u1ed7 cao c\u1ea5p nh\u01b0 t\u1ee7 \u0111\u1ee9ng, t\u1ee7 ly, xa l\u00f4ng v\u00e0 c\u00e1c \u0111\u1ed3 trang tr\u00ed n\u1ed9i th\u1ea5t… Tuy nhi\u00ean, do gi\u00e1 tr\u1ecb th\u01b0\u01a1ng ph\u1ea9m c\u1ee7a lo\u00e0i c\u00e2y n\u00e0y n\u00ean \u0111\u00e3 b\u1ecb khai th\u00e1c qu\u00e1 m\u1ee9c. N\u0103m 1985, B\u1ed9 L\u00e2m nghi\u1ec7p \u0111\u00e3 ra quy\u1ebft \u0111\u1ecbnh c\u1ea5m khai th\u00e1c lo\u1ea1i g\u1ed7 n\u00e0y v\u00e0 \u0111\u01b0a v\u00e0o danh l\u1ee5c th\u1ef1c v\u1eadt qu\u00fd hi\u1ebfm c\u1ea7n \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 (Ngh\u1ecb \u0111\u1ecbnh 18 H\u0110BT 1992). Trong Ch\u01b0\u01a1ng tr\u00ecnh 327 v\u00e0 Ch\u01b0\u01a1ng tr\u00ecnh 5 tri\u1ec7u ha r\u1eebng tr\u1ed3ng, c\u00e2y l\u00e1t l\u00e0 m\u1ed9t trong nh\u1eefng c\u00e2y b\u1ea3n \u0111\u1ecba \u0111\u01b0\u1ee3c ch\u00fa tr\u1ecdng trong c\u01a1 c\u1ea5u c\u00e2y tr\u1ed3ng \u0111\u1ec3 ph\u00e1t tri\u1ec3n r\u1eebng…<\/p>\n

M\u1ed9t trong nh\u1eefng tr\u1edf ng\u1ea1i l\u1edbn nh\u1ea5t c\u1ee7a vi\u1ec7c tr\u1ed3ng v\u00e0 ph\u00e1t tri\u1ec3n c\u00e2y l\u00e1t l\u00e0 v\u1ea5n \u0111\u1ec1 s\u00e2u h\u1ea1i. C\u00f3 nhi\u1ec1u lo\u00e0i s\u00e2u h\u1ea1i \u0111\u00e3 \u0111\u01b0\u1ee3c quan s\u00e1t th\u1ea5y tr\u00ean c\u00e2y l\u00e1t nh\u01b0 c\u00e1c lo\u00e0i s\u00e2u \u0103n l\u00e1, m\u1ed1i h\u1ea1i r\u1ec5 v\u00e0 nh\u01b0ng \u0111\u1eb7c bi\u1ec7t ph\u00e1 h\u1ea1i nghi\u00eam tr\u1ecdng l\u00e0 lo\u00e0i s\u00e2u \u0111\u1ee5c n\u00f5n Hypsipyla robusta<\/em>; h\u1ea7u h\u1ebft c\u00e2y l\u00e1t t\u1ea1i r\u1eebng tr\u1ed3ng \u0111\u1ec1u b\u1ecb lo\u00e0i s\u00e2u n\u00e0y ph\u00e1 h\u1ea1i. S\u00e2u \u0111\u1ee5c n\u00f5n th\u01b0\u1eddng h\u1ea1i c\u00e1c ch\u1ed3i c\u1ee7a c\u00e2y l\u00e1t, nh\u1ea5t l\u00e0 \u0111\u1ec9nh sinh tr\u01b0\u1edfng khi b\u1ecb s\u00e2u h\u1ea1i th\u01b0\u1eddng ch\u1ebft, sau \u0111\u00f3 m\u1ed9t th\u1eddi gian c\u00e1c ch\u1ed3i b\u00ean m\u1edbi ph\u00e1t tri\u1ec3n t\u1eeb ph\u1ea7n d\u01b0\u1edbi c\u1ee7a \u0111\u1ec9nh sinh tr\u01b0\u1edfng \u0111\u00e3 b\u1ecb ch\u1ebft. S\u1ef1 ph\u00e1 h\u1ea1i nh\u01b0 v\u1eady th\u01b0\u1eddng l\u00e0m c\u00e2y h\u1ea1n ch\u1ebf ph\u00e1t tri\u1ec3n chi\u1ec1u cao, th\u00e2n th\u01b0\u1eddng b\u1ecb d\u1ecb d\u1ea1ng (kh\u00f4ng th\u1eb3ng), do \u0111\u00f3 l\u00e0m gi\u1ea3m n\u0103ng su\u1ea5t v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng g\u1ed7.<\/p>\n

Kh\u00f4ng nh\u01b0 nh\u1eefng lo\u00e0i s\u00e2u \u0103n l\u00e1 kh\u00e1c, vi\u1ec7c ph\u00f2ng tr\u1eeb lo\u00e0i s\u00e2u \u0111\u1ee5c n\u00f5n b\u1eb1ng thu\u1ed1c tr\u1eeb s\u00e2u ho\u00e1 ch\u1ea5t \u00edt c\u00f3 hi\u1ec7u qu\u1ea3 v\u00ec s\u00e2u non khi ph\u00e1 h\u1ea1i l\u00e0m th\u00e0nh nh\u1eefng \u0111\u01b0\u1eddng h\u1ea7m trong n\u00f5n c\u00e2y n\u00ean thu\u1ed1c r\u1ea5t kh\u00f3 ti\u1ebfp x\u00fac. M\u1eb7t kh\u00e1c, vi\u1ec7c s\u1eed d\u1ee5ng thu\u1ed1c tr\u1eeb s\u00e2u ho\u00e1 ch\u1ea5t \u00edt nhi\u1ec1u s\u1ebd g\u00e2y n\u00ean nh\u1eefng h\u1eadu qu\u1ea3 x\u1ea5u, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn sinh th\u00e1i v\u00e0 m\u00f4i tr\u01b0\u1eddng, \u0111\u00f2i h\u1ecfi ph\u1ea3i c\u00f3 nh\u1eefng bi\u1ec7n ph\u00e1p kh\u00e1c ph\u00f9 h\u1ee3p v\u00e0 c\u00f3 hi\u1ec7u qu\u1ea3.<\/p>\n

M\u1ed9t trong nh\u1eefng h\u01b0\u1edbng nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c nhi\u1ec1u n\u01b0\u1edbc ti\u00ean ti\u1ebfn tr\u00ean th\u1ebf gi\u1edbi ti\u1ebfn h\u00e0nh l\u00e0 nghi\u00ean c\u1ee9u tuy\u1ec3n ch\u1ecdn nh\u1eefng d\u00f2ng, gia \u0111\u00ecnh, xu\u1ea5t x\u1ee9, lo\u00e0i c\u00f3 t\u00ednh ch\u1ed1ng ch\u1ecbu s\u00e2u b\u1ec7nh cao \u0111\u1ec3 gi\u1ea3m thi\u1ec3u s\u1ef1 ph\u00e1 h\u1ea1i c\u1ee7a s\u00e2u b\u1ec7nh. V\u1edbi \u0111\u1ecbnh h\u01b0\u1edbng tr\u00ean, d\u1ef1 \u00e1n “Ph\u00f2ng tr\u1eeb s\u00e2u \u0111\u1ee5c n\u00f5n Hypsipyla robusta<\/em> h\u1ea1i m\u1ed9t s\u1ed1 lo\u00e0i c\u00e2y h\u1ecd Xoan b\u1eb1ng bi\u1ec7n ph\u00e1p ch\u1ecdn c\u00e2y ch\u1ed1ng ch\u1ecbu s\u00e2u h\u1ea1i v\u00e0 bi\u1ec7n ph\u00e1p l\u00e2m sinh t\u1ea1i \u0110\u00f4ng Nam ch\u00e2u \u00e1 v\u00e0 \u00fac” do ACIAR (Trung t\u00e2m Nghi\u00ean c\u1ee9u N\u00f4ng nghi\u1ec7p Qu\u1ed1c t\u1ebf c\u1ee7a \u00fac) t\u00e0i tr\u1ee3 \u0111\u00e3 \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh \u1edf m\u1ed9t s\u1ed1 n\u01b0\u1edbc trong v\u00f9ng trong \u0111\u00f3 c\u00f3 Vi\u1ec7t Nam v\u1edbi s\u1ef1 h\u1ee3p t\u00e1c nghi\u00ean c\u1ee9u c\u1ee7a c\u00e1c nh\u00e0 khoa h\u1ecdc CSIRO Division of Entomology v\u00e0 Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam. N\u1ed9i dung ch\u00ednh c\u1ee7a d\u1ef1 \u00e1n \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh t\u1ea1i Vi\u1ec7t Nam l\u00e0 \u0111i\u1ec1u tra \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 h\u1ea1i c\u1ee7a s\u00e2u \u0111\u1ee5c n\u00f5n H. robusta<\/em> tr\u00ean c\u00e1c khu kh\u1ea3o nghi\u1ec7m xu\u1ea5t x\u1ee9 l\u00e1t do d\u1ef1 \u00e1n ACIAR FST 96\/05 thi\u1ebft l\u1eadp, nh\u1eb1m ph\u00e1t hi\u1ec7n nh\u1eefng xu\u1ea5t x\u1ee9 l\u00e1t c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u1ecbu cao \u0111\u1ed1i v\u1edbi s\u1ef1 ph\u00e1 h\u1ea1i c\u1ee7a lo\u00e0i s\u00e2u \u0111\u1ee5c n\u00f5n n\u00e0y.<\/p>\n

I. Ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec1u tra v\u00e0 \u0111\u00e1nh gi\u00e1<\/h1>\n

– Vi\u1ec7c \u0111i\u1ec1u tra \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 h\u1ea1i c\u1ee7a s\u00e2u \u0111\u1ee5c n\u00f5n H. robusta<\/em> \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh tr\u00ean c\u00e1c khu kh\u1ea3o nghi\u1ec7m xu\u1ea5t x\u1ee9 l\u00e1t t\u1ea1i H\u00e0 T\u00e2y, Ho\u00e0 B\u00ecnh, Gia Lai.<\/p>\n

– C\u00e1c khu th\u1eed nghi\u1ec7m n\u00e0y \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed theo s\u01a1 \u0111\u1ed3 kh\u1ed1i v\u1edbi 24 xu\u1ea5t x\u1ee9, 4 l\u1ea7n l\u1eb7p l\u1ea1i theo c\u00e1ch ng\u1eabu nhi\u00ean.<\/p>\n

– H\u1ea1t gi\u1ed1ng c\u1ee7a 24 xu\u1ea5t x\u1ee9 l\u00e1t \u0111\u01b0\u1ee3c thu t\u1eeb c\u00e1c v\u00f9ng kh\u00e1c nhau c\u1ee7a c\u00e1c n\u01b0\u1edbc: Vi\u1ec7t Nam, Th\u00e1i Lan, Myanmar, L\u00e0o, \u1ea5n \u0110\u1ed9, Trung Qu\u1ed1c, \u00fac, Sri Lanka v\u00e0 Malaysia.<\/p>\n

– M\u1ed7i xu\u1ea5t x\u1ee9 g\u1ed3m 25 c\u00e2y. To\u00e0n b\u1ed9 c\u00e2y tr\u00ean khu th\u1eed nghi\u1ec7m \u0111\u01b0\u1ee3c tr\u1ed3ng c\u00e2y c\u00e1ch c\u00e2y 3m v\u00e0 h\u00e0ng c\u00e1ch h\u00e0ng 3m.<\/p>\n

\u0110\u1ec3 b\u1ea3o \u0111\u1ea3m t\u00ednh c\u00e1ch bi\u1ec7t gi\u1eefa c\u00e1c xu\u1ea5t x\u1ee9 li\u1ec1n k\u1ec1 v\u1edbi nhau, trong 25 c\u00e2y c\u1ee7a m\u1ed9t xu\u1ea5t x\u1ee9 ch\u1ec9 c\u00f3 9 c\u00e2y \u1edf gi\u1eefa \u0111\u01b0\u1ee3c \u0111i\u1ec1u tra \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 h\u1ea1i c\u1ee7a s\u00e2u \u0111\u1ee5c n\u00f5n, 16 c\u00e2y \u1edf v\u00f2ng ngo\u00e0i li\u1ec1n k\u1ec1 v\u1edbi c\u00e2y c\u1ee7a c\u00e1c xu\u1ea5t x\u1ee9 kh\u00e1c kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 (\u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 c\u00e2y v\u00f9ng \u0111\u1ec7m). C\u00e2y \u1edf v\u00f9ng \u0111\u1ec7m kh\u00f4ng l\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u1ec3 \u0111i\u1ec1u tra \u0111\u00e1nh gi\u00e1 v\u00ec \u1edf v\u00f9ng \u0111\u1ec7m n\u00e0y s\u1ef1 ph\u00e1 h\u1ea1i c\u1ee7a s\u00e2u \u0111\u1ee5c n\u00f5n H. robusta<\/em> coi nh\u01b0 mang t\u00ednh ng\u1eabu nhi\u00ean, kh\u00f4ng th\u1ec3 hi\u1ec7n r\u00f5 s\u1ef1 m\u1eabn c\u1ea3m \u0111\u1ed1i v\u1edbi s\u00e2u h\u1ea1i c\u1ee7a t\u1eebng xu\u1ea5t x\u1ee9.<\/p>\n

– \u0110i\u1ec1u tra \u0111\u00e1nh gi\u00e1 \u0111\u1ecbnh k\u1ef3 2 th\u00e1ng m\u1ed9t l\u1ea7n.<\/p>\n

– S\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p c\u1ee7a CSIRO Division of Entomology \u0111\u1ec3 \u0111i\u1ec1u tra v\u00e0 \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 h\u1ea1i c\u1ee7a s\u00e2u \u0111\u1ee5c n\u00f5n H. robusta<\/em> t\u1eeb \u0111\u00f3 x\u00e1c \u0111\u1ecbnh t\u00ednh m\u1eabn c\u1ea3m \u0111\u1ed1i v\u1edbi s\u00e2u h\u1ea1i c\u1ee7a t\u1eebng xu\u1ea5t x\u1ee9.<\/p>\n

– C\u00e1c s\u1ed1 li\u1ec7u \u0111i\u1ec1u tra \u0111\u01b0\u1ee3c x\u1eed l\u00fd tr\u00ean m\u00e1y t\u00ednh b\u1eb1ng ch\u01b0\u01a1ng tr\u00ecnh Hypsipyla Database.<\/p>\n

II. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u00e0 th\u1ea3o lu\u1eadn<\/p>\n

1. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u<\/strong><\/p>\n

Sau 12 th\u00e1ng v\u1edbi 6 l\u1ea7n \u0111i\u1ec1u tra \u0111\u00e1nh gi\u00e1, c\u00e1c s\u1ed1 li\u1ec7u thu th\u1eadp \u0111\u01b0\u1ee3c x\u1eed l\u00fd tr\u00ean m\u00e1y t\u00ednh \u0111\u00e3 cho th\u1ea5y:<\/p>\n

– T\u1ef7 l\u1ec7 c\u00e2y b\u1ecb s\u00e2u \u0111\u1ee5c n\u00f5n H. robusta<\/em> ph\u00e1 h\u1ea1i tr\u00ean c\u00e1c khu th\u1eed nghi\u1ec7m xu\u1ea5t x\u1ee9 l\u00e1t l\u00e0:<\/p>\n

\u00b7 T\u1ea1i khu th\u1eed nghi\u1ec7m C\u1ea9m Qu\u1ef3 – H\u00e0 T\u00e2y: 58,8%.<\/p>\n

\u00b7 T\u1ea1i khu th\u1eed nghi\u1ec7m Kim B\u00f4i – Ho\u00e0 B\u00ecnh: 21,8%.<\/p>\n

\u00b7 T\u1ea1i khu th\u1eed nghi\u1ec7m Mang Yang – Gia Lai: 1,7%.<\/p>\n

– S\u1ed1 v\u1ebft b\u1ecb s\u00e2u \u0111\u1ee5c n\u00f5n h\u1ea1i tr\u00ean m\u1ed9t c\u00e2y: bi\u1ebfn thi\u00ean t\u1eeb 0 \u0111\u1ebfn 5 v\u1ebft.<\/p>\n

– Nh\u1eefng c\u00e2y c\u00f3 chi\u1ec1u cao d\u01b0\u1edbi 0,4 m r\u1ea5t hi\u1ebfm khi b\u1ecb s\u00e2u \u0111\u1ee5c n\u00f5n ph\u00e1 h\u1ea1i.<\/p>\n

– C\u00e1c xu\u1ea5t x\u1ee9 l\u00e1t tr\u00ean khu th\u1eed nghi\u1ec7m \u0111\u1ec1u b\u1ecb s\u00e2u \u0111\u1ee5c n\u00f5n t\u1ea5n c\u00f4ng nh\u01b0ng kh\u00e1c nhau v\u1ec1 t\u1ef7 l\u1ec7 c\u00e2y b\u1ecb h\u1ea1i v\u00e0 m\u1ee9c \u0111\u1ed9 b\u1ecb h\u1ea1i.<\/p>\n

– T\u1ef7 l\u1ec7 ph\u1ea7n tr\u0103m s\u1ed1 c\u00e2y b\u1ecb h\u1ea1i c\u1ee7a t\u1eebng xu\u1ea5t x\u1ee9 cho th\u1ea5y: cao nh\u1ea5t l\u00e0 xu\u1ea5t x\u1ee9 Atherton (\u00fac): 62,86% v\u00e0 th\u1ea5p nh\u1ea5t l\u00e0 xu\u1ea5t x\u1ee9 Mea Phrik Lampang (Th\u00e1i Lan): 23, 61%.<\/p>\n

– M\u1ee9c \u0111\u1ed9 b\u1ecb s\u00e2u \u0111\u1ee5c n\u00f5n ph\u00e1 h\u1ea1i (s\u1ed1 v\u1ebft b\u1ecb h\u1ea1i trung b\u00ecnh) c\u1ee7a t\u1eebng xu\u1ea5t x\u1ee9 cho th\u1ea5y: cao nh\u1ea5t l\u00e0 xu\u1ea5t x\u1ee9 Atherton (Australia): 1,36 v\u00e0 th\u1ea5p nh\u1ea5t l\u00e0 xu\u1ea5t x\u1ee9 Lampang (Th\u00e1i Lan): 0,29.<\/p>\n

5 xu\u1ea5t x\u1ee9 c\u1ee7a Vi\u1ec7t Namc\u00f3 t\u1ef7 l\u1ec7 ph\u1ea7n tr\u0103m s\u1ed1 c\u00e2y b\u1ecb h\u1ea1i v\u00e0 s\u1ed1 v\u1ebft b\u1ecb h\u1ea1i trung b\u00ecnh l\u00e0:<\/p>\n

\u00b7 Gia Lai: 50% v\u00e0 1,1<\/p>\n

\u00b7 Ho\u00e0 B\u00ecnh: 49,3% v\u00e0 1,07<\/p>\n

\u00b7 Tuy\u00ean Quang: 41,43% v\u00e0 0.72<\/p>\n

\u00b7 Thanh Ho\u00e1: 40,85% v\u00e0 0,75<\/p>\n

\u00b7 S\u01a1n La: 33,85% v\u00e0 0,44.<\/p>\n

Nh\u1eefng k\u1ebft qu\u1ea3 tr\u00ean b\u01b0\u1edbc \u0111\u1ea7u cho ph\u00e9p c\u00f3 nh\u1eefng nh\u1eadn x\u00e9t sau:<\/p>\n

– C\u00f3 s\u1ef1 kh\u00e1c nhau v\u1ec1 t\u1ef7 l\u1ec7 c\u00e2y b\u1ecb h\u1ea1i v\u00e0 m\u1ee9c \u0111\u1ed9 h\u1ea1i c\u1ee7a s\u00e2u \u0111\u1ee5c n\u00f5n H. robusta<\/em> tr\u00ean c\u00e1c xu\u1ea5t x\u1ee9 l\u00e1t; hay n\u00f3i c\u00e1ch kh\u00e1c l\u00e0 c\u00f3 s\u1ef1 m\u1eabn c\u1ea3m kh\u00e1c nhau c\u1ee7a t\u1eebng xu\u1ea5t x\u1ee9 l\u00e1t \u0111\u1ed1i v\u1edbi s\u00e2u \u0111\u1ee5c n\u00f5n H. robusta<\/em>.<\/p>\n

– V\u1ec1 m\u1ee9c \u0111\u1ed9 m\u1eabn c\u1ea3m v\u1edbi s\u00e2u \u0111\u1ee5c n\u00f5n v\u00e0 kh\u1ea3 n\u0103ng sinh tr\u01b0\u1edfng c\u1ee7a c\u00e2y l\u00e1t, c\u00f3 th\u1ec3 chia l\u00e0m 4 nh\u00f3m:<\/p>\n

+ Nh\u00f3m 1<\/em>: M\u1ee9c \u0111\u1ed9 m\u1eabn c\u1ea3m v\u1edbi s\u00e2u \u0111\u1ee5c n\u00f5n th\u1ea5p, c\u00f3 sinh tr\u01b0\u1edfng chi\u1ec1u cao t\u1ed1t.<\/p>\n

+ Nh\u00f3m 2<\/em>: M\u1ee9c \u0111\u1ed9 m\u1eabn c\u1ea3m v\u1edbi s\u00e2u \u0111\u1ee5c n\u00f5n cao, c\u00f3 sinh tr\u01b0\u1edfng chi\u1ec1u cao t\u1ed1t.<\/p>\n

+ Nh\u00f3m 3<\/em>: M\u1ee9c \u0111\u1ed9 m\u1eabn c\u1ea3m v\u1edbi s\u00e2u \u0111\u1ee5c n\u00f5n th\u1ea5p, c\u00f3 sinh tr\u01b0\u1edfng chi\u1ec1u cao k\u00e9m.<\/p>\n

+ Nh\u00f3m 4<\/em>: M\u1ee9c \u0111\u1ed9 m\u1eabn c\u1ea3m v\u1edbi s\u00e2u \u0111\u1ee5c n\u00f5n cao, c\u00f3 sinh tr\u01b0\u1edfng chi\u1ec1u cao k\u00e9m.<\/p>\n

M\u1ee9c \u0111\u1ed9 h\u1ea1i c\u1ee7a s\u00e2u \u0111\u1ee5c n\u00f5n H. robusta tr\u00ean c\u00e1c xu\u1ea5t x\u1ee9 l\u00e1t sau m\u1ed9t n\u0103m \u0111i\u1ec1u tra v\u00e0 theo d\u00f5i.<\/em><\/p>\n

2. Th\u1ea3o lu\u1eadn.<\/strong><\/p>\n

– \u0110\u1ed1i v\u1edbi s\u1ef1 kh\u00e1c nhau v\u1ec1 t\u1ef7 l\u1ec7 c\u00e2y l\u00e1t b\u1ecb h\u1ea1i v\u00e0 m\u1ee9c \u0111\u1ed9 h\u1ea1i do s\u00e2u \u0111\u1ee5c n\u00f5n c\u1ee7a c\u00e1c xu\u1ea5t x\u1ee9 l\u00e1t tr\u00ean c\u00e1c khu kh\u1ea3o nghi\u1ec7m t\u1ea1i H\u00e0 T\u00e2y, Ho\u00e0 B\u00ecnh v\u00e0 Gia Lai; ch\u00fang t\u00f4i cho r\u1eb1ng c\u00f3 th\u1ec3 do nh\u1eefng nguy\u00ean nh\u00e2n sau:<\/p>\n

+ M\u1ee9c \u0111\u1ed9 sinh tr\u01b0\u1edfng chi\u1ec1u cao c\u1ee7a c\u00e2y l\u00e1t t\u1ea1i c\u00e1c khu th\u1eed nghi\u1ec7m l\u00e0 kh\u00e1c nhau (\u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a s\u00e2u \u0111\u1ee5c n\u00f5n H. robusta<\/em> l\u00e0 th\u01b0\u1eddng h\u1ea1i nh\u1eefng c\u00e2y c\u00f3 chi\u1ec1u cao tr\u00ean 0,4 m\u00e9t).<\/p>\n

+ Ph\u00e2n b\u1ed1 t\u1ef1 nhi\u00ean c\u1ee7a c\u00e2y l\u00e1t li\u00ean quan \u0111\u1ebfn th\u00e0nh ph\u1ea7n k\u00fd sinh thi\u00ean \u0111\u1ecbch (k\u1ebb th\u00f9 t\u1ef1 nhi\u00ean c\u1ee7a s\u00e2u \u0111\u1ee5c n\u00f5n H. robusta<\/em>).<\/p>\n

– \u0110\u1ed1i v\u1edbi kh\u00e1i ni\u1ec7m c\u00e2y ch\u1ed1ng ch\u1ecbu s\u00e2u b\u1ec7nh n\u00f3i chung v\u00e0 ch\u1ed1ng ch\u1ecbu s\u00e2u \u0111\u1ee5c n\u00f5n H. robusta<\/em> n\u00f3i ri\u00eang n\u00ean \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch th\u00e0nh hai kh\u00e1i ni\u1ec7m c\u1ee5 th\u1ec3 h\u01a1n l\u00e0:<\/p>\n

+ Kh\u00e1ng s\u00e2u b\u1ec7nh (resistance): c\u00f3 ngh\u0129a l\u00e0 b\u1ea3n th\u00e2n c\u00e2y c\u00f3 nh\u1eefng y\u1ebfu t\u1ed1 n\u00e0o \u0111\u00f3 v\u1ec1 sinh ho\u00e1 ho\u1eb7c h\u00ecnh d\u1ea1ng… kh\u00f4ng ho\u1eb7c \u00edt \u01b0a th\u00edch \u0111\u1ed1i v\u1edbi s\u00e2u, b\u1ec7nh t\u1ea5n c\u00f4ng v\u00e0 ph\u00e1 h\u1ea1i.<\/p>\n

+ Ch\u1ed1ng ch\u1ecbu s\u00e2u b\u1ec7nh (tolerance): c\u00f3 ngh\u0129a l\u00e0 m\u1eb7c d\u00f9 b\u1ecb s\u00e2u, b\u1ec7nh t\u1ea5n c\u00f4ng v\u00e0 ph\u00e1 h\u1ea1i nh\u01b0ng c\u00e2y ph\u1ee5c h\u1ed3i nhanh v\u00e0 v\u1eabn sinh tr\u01b0\u1edfng t\u1ed1t.<\/p>\n

– D\u1ef1a v\u00e0o kh\u1ea3 n\u0103ng sinh tr\u01b0\u1edfng v\u00e0 m\u1eabn c\u1ea3m \u0111\u1ed1i v\u1edbi s\u00e2u \u0111\u1ee5c n\u00f5n H. robusta<\/em> c\u1ee7a c\u00e1c xu\u1ea5t x\u1ee9 l\u00e1t tr\u00ean khu th\u1eed nghi\u1ec7m \u0111\u1ec3 chia th\u00e0nh 4 nh\u00f3m s\u1ebd l\u00e0 nh\u1eefng \u0111\u1ecbnh h\u01b0\u1edbng b\u01b0\u1edbc \u0111\u1ea7u trong vi\u1ec7c tuy\u1ec3n ch\u1ecdn c\u00e1c xu\u1ea5t x\u1ee9 l\u00e1t tr\u00ean khu th\u1eed nghi\u1ec7m c\u00f3 t\u00ednh ch\u1ed1ng ch\u1ecbu cao \u0111\u1ed1i v\u1edbi lo\u00e0i s\u00e2u h\u1ea1i n\u00e0y.<\/p>\n

Tuy nhi\u00ean, \u0111\u00e2y ch\u1ec9 l\u00e0 nh\u1eefng nh\u1eadn x\u00e9t ban \u0111\u1ea7u, c\u00f4ng vi\u1ec7c \u0111i\u1ec1u tra v\u00e0 \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 h\u1ea1i c\u1ee7a s\u00e2u \u0111\u1ee5c n\u00f5n H. robusta <\/em>tr\u00ean c\u00e1c xu\u1ea5t x\u1ee9 l\u00e1t c\u1ee7a d\u1ef1 \u00e1n s\u1ebd ti\u1ebfp t\u1ee5c trong nh\u1eefng n\u0103m t\u1edbi \u0111\u1ec3 kh\u1eb3ng \u0111\u1ecbnh nh\u1eefng nh\u1eadn x\u00e9t tr\u00ean.<\/p>\n

T\u00e0i li\u1ec7u tham kh\u1ea3o.<\/h1>\n

1. Nguyen Van Do, 1996. Hypsipyla Shoot borer of Meliaceae in Vietnam. Country report at International Workshop on Hypsipyla. 20-23 August 1996 Kandy, Sri Lanka.<\/p>\n

2. Edmonds- JM !993 The potential value of Toona species (Meliaceae) as multipurpose and plantation trees in Southeast Asia. Commonwealth- forestry- review, 72: 3, 181-186; 38 ref.<\/p>\n

3. Hawxwell, C., Mayhew, J.E. and Newton, A. C., in press Silvicultural control of the shoot borer. Proceedings from the International Workshop on Hypsipyla shoot borers in the Meliaceae. 20-23 August 1996, Kandy, Sri Lanka.<\/p>\n

4. Matsumoto-K; Kotulai-JR; Chan-Hing Hon 1998. Insect pests of mahoganies with particular attention to shoot borers. proceedings of the seminar on hight value timber species for plantation establishment- Teak and mahoganies, Tawau, Sabah, Malaysia, 1-2 December 1998.<\/p>\n

5. Newton, A.C. 1993. Prospects of growing mahogany in plantations In: The proceedings of Second Pan American Furniture Manufactures’ Symposium on Tropical Hardwoods, November 3-5 1992. Centre for Environmental Study, USA.<\/p>\n

6. Newton, A.C., Cornelius, J.P., Baker, P., Gilles, A.C.M., Hernandez, M., Ramnarine, S., Mesen, J.F. and Watt, A.D. 1996. Mahogany as a genetic resource. Botanical Journal of the Linnean Society 122: 61-73.<\/p>\n

Preliminary results of the survey on level of damage caused by Hypsipyla robusta shoot borer on some Chukrasia tabularis provenaces<\/strong><\/p>\n

Summary:<\/em><\/strong>The ACIAR project No. FST\/97\/24 on “Insect resistance and silvicultural control of the shoot borer, Hypsipyla robusta<\/em> feeding on species of Meliaceae<\/em> in Southeast Asiaand Australia” has been undertaken by the cooperation of Forest Science Institute of Vietnam and CSIRO Entomology Division. The main task of this project in Vietnamis to survey and assess Hypsipyla <\/em>damage on the Chukrasia<\/em> provenance trials in Ha Tay, Hoa Binh and Gia Lai provinces in order to find out the Chukrasia <\/em>provenance having high insect resistance.<\/p>\n

After 1 year conducting the project, some initial remarks on incidence of Hypsipyla<\/em> attack and damaged level of Chukrasia <\/em>provenances by this insect at the trials is presented and discussed in the paper.<\/p>\n

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

Nguy\u1ec5n V\u0103n \u0110\u1ed9, \u0110\u00e0o Ng\u1ecdc Quang Ph\u00f2ng Nghi\u00ean c\u1ee9u B\u1ea3o v\u1ec7 r\u1eebng Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam L\u00e1t hoa Chukrasia tabularis A. Juss. thu\u1ed9c h\u1ecd Xoan (Meliaceae)l\u00e0 lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba, ph\u00e2n b\u1ed1 tr\u00ean nhi\u1ec1u v\u00f9ng sinh th\u00e1i \u1edf n\u01b0\u1edbc ta. G\u1ed7 c\u1ee7a c\u00e2y l\u00e1t hoa (g\u1ed7 l\u00e1t) b\u1ec1n, c\u00f3 v\u00e2n g\u1ed7 v\u00e0 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[18],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8577"}],"collection":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/comments?post=8577"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8577\/revisions"}],"predecessor-version":[{"id":19324,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8577\/revisions\/19324"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=8577"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=8577"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=8577"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}