{"id":8645,"date":"2009-03-24T02:34:30","date_gmt":"2009-03-23T19:34:30","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2009\/03\/ket-qua-ban-dau-ve-dieu-tra-danh-gia-thiet-hai-do-sau-duc-than-tren-mot-so-xuat-xu-tram\/"},"modified":"2019-09-25T10:06:50","modified_gmt":"2019-09-25T03:06:50","slug":"ket-qua-ban-dau-ve-dieu-tra-danh-gia-thiet-hai-do-sau-duc-than-tren-mot-so-xuat-xu-tram","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/ket-qua-ban-dau-ve-dieu-tra-danh-gia-thiet-hai-do-sau-duc-than-tren-mot-so-xuat-xu-tram\/","title":{"rendered":"K\u1ebfT qu\u1ea3 BAN \u0110\u1ea7U V\u1ec1 \u0110I\u1ec1U TRA \u0110\u00e1NH gi\u00e1 THI\u1ec7T H\u1ea1I DO S\u00e2U \u0110\u1ee5C TH\u00e2N TR\u00eaN M\u1ed9T S\u1ed1 XU\u1ea5T X\u1ee9 TR\u00e0M"},"content":{"rendered":"

Nguy\u1ec5n Th\u1ecb L\u1ec1, Nguy\u1ec5n Th\u1ecb H\u1ea3i H\u1ed3ng<\/em><\/p>\n

Ph\u00e2n vi\u1ec7n Nghi\u00ean c\u1ee9u Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam b\u1ed9<\/em><\/strong><\/p>\n

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

C\u00e2y Tr\u00e0m \u0111\u00ad\u1ee3c tr\u1ed3ng \u1edf v\u00f9ng \u0111\u1ed3ng b\u1eb1ng s\u00f4ng C\u1eedu Long c\u00f3 ngu\u1ed3n g\u1ed1c t\u1eeb Vi\u1ec7t Nam, \u00facv\u00e0 m\u1ed9t s\u1ed1 n\u01a1i kh\u00e1c, bao g\u1ed3m c\u00e1c lo\u00e0i M. leucadendra, M.viridiflora, M.cajuputy<\/em>. Trong \u0111\u00f3, c\u00f3 m\u1ed9t s\u1ed1 lo\u00e0i\/xu\u1ea5t x\u1ee9 m\u1edbi th\u1ef1c s\u1ef1 c\u00f3 n\u0103ng su\u1ea5t cao v\u00e0 \u0111\u00e3 \u0111\u00ad\u1ee3c \u0111\u00ada v\u00e0o g\u00e2y tr\u1ed3ng tr\u00ean di\u1ec7n t\u00edch r\u1ed9ng. Tuy nhi\u00ean, t\u00ecnh h\u00ecnh s\u00e2u \u0111\u1ee5c th\u00e2n g\u00e2y h\u1ea1i tr\u00ean nh\u1eefng lo\u00e0i\/xu\u1ea5t x\u1ee9 n\u00e0y h\u1ebft s\u1ee9c nghi\u00eam tr\u1ecdng. Kh\u00f4ng gi\u1ed1ng nh\u1eefng lo\u00e0i s\u00e2u h\u1ea1i kh\u00e1c, s\u00e2u \u0111\u1ee5c th\u00e2n \u1ea3nh h\u00ad\u1edfng x\u1ea5u \u0111\u1ebfn ch\u1ea5t l\u00ad\u1ee3ng g\u1ed7 Tr\u00e0m, trong tr\u00ad\u1eddng h\u1ee3p nghi\u00eam tr\u1ecdng c\u00f3 th\u1ec3 l\u00e0m ch\u1ebft c\u00e2y. V\u00ec v\u1eady, vi\u1ec7c nghi\u00ean c\u1ee9u v\u1ec1 lo\u00e0i s\u00e2u h\u1ea1i n\u00e0y, m\u1ee9c \u0111\u1ed9 g\u00e2y h\u1ea1i c\u1ee7a ch\u00fang tr\u00ean c\u00e1c lo\u00e0i\/xu\u1ea5t x\u1ee9 Tr\u00e0m \u0111\u1ec3 \u0111\u1ec1 ra m\u1ed9t s\u1ed1 gi\u1ea3i ph\u00e1p ph\u00f2ng tr\u1eeb hi\u1ec7u qu\u1ea3 l\u00e0 h\u1ebft s\u1ee9c c\u1ea7n thi\u1ebft.<\/p>\n

I. M\u1ee5c ti\u00eau v\u00e0 ph\u00ad\u01a1ng ph\u00e1p \u0111i\u1ec1u tra nghi\u00ean c\u1ee9u<\/p>\n

1. M\u1ee5c ti\u00eau<\/em><\/p>\n

X\u00e1c \u0111\u1ecbnh \u0111\u1eb7c \u0111i\u1ec3m sinh h\u1ecdc c\u1ee7a lo\u00e0i s\u00e2u \u0111\u1ee5c th\u00e2n (Zeuzera coffea).<\/em><\/p>\n

X\u00e1c \u0111\u1ecbnh th\u1eddi gian v\u00e0 m\u1ee9c \u0111\u1ed9 thi\u1ec7t h\u1ea1i do s\u00e2u \u0111\u1ee5c th\u00e2n g\u00e2y ra tr\u00ean m\u1ed9t s\u1ed1 lo\u00e0i\/xu\u1ea5t x\u1ee9 tr\u00e0m, nh\u1eb1m \u0111\u00ada ra bi\u1ec7n ph\u00e1p ph\u00f2ng tr\u1eeb hi\u1ec7u qu\u1ea3.<\/p>\n

\u0110\u00e1nh gi\u00e1 s\u01a1 b\u1ed9 kh\u1ea3 n\u0103ng kh\u00e1ng s\u00e2u \u0111\u1ee5c th\u00e2n c\u1ee7a m\u1ed9t s\u1ed1 lo\u00e0i\/xu\u1ea5t x\u1ee9 nh\u1eb1m h\u1ed7 tr\u1ee3 cho ch\u1ecdn gi\u1ed1ng trong t\u00ad\u01a1ng lai.<\/p>\n

2. Ph\u00ad\u01a1ng ph\u00e1p \u0111i\u1ec1u tra <\/em><\/p>\n

Vi\u1ec7c\u0111i\u1ec1u tra \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 h\u1ea1i c\u1ee7a s\u00e2u \u0111\u1ee5c th\u00e2n Tr\u00e0m (Zeuzera coffea)<\/em> \u0111\u00ad\u1ee3c ti\u1ebfn h\u00e0nh t\u1ea1i v\u00ad\u1eddn gi\u1ed1ng Th\u1ea1nh H\u00f3a, Long An.<\/p>\n

V\u00ad\u1eddn gi\u1ed1ng g\u1ed3m c\u00f3 3 lo\u00e0i tr\u00e0m\/22 xu\u1ea5t x\u1ee9:<\/p>\n

– M. leucadendra<\/em>: 5 xu\u1ea5t x\u1ee9 (25 d\u00f2ng, 625 c\u00e2y).<\/p>\n

– M. viridiflora<\/em> : 5 ——— 25——- 625–<\/p>\n

– M. cajuputy <\/em>: 12——– 12——–936—-<\/p>\n

Th\u1eddi gian \u0111i\u1ec1u tra t\u1eeb 2\/2001 \u2013 7\/2001.<\/p>\n

Di\u1ec7n t\u00edch v\u00ad\u1eddn gi\u1ed1ng 1,2ha, c\u00e2y \u0111\u00ad\u1ee3c tr\u1ed3ng tr\u00ean 23 l\u00edp c\u00f3 chi\u1ec1u r\u1ed9ng m\u1eb7t l\u00edp 2,8m, c\u1ef1 ly c\u00e2y tr\u1ed3ng 1,73m x 1,73m .<\/p>\n

Ph\u00ad\u01a1ng ph\u00e1p \u0111i\u1ec1u tra: \u0110i \u0111i\u1ec1u tra theo h\u00e0ng, ki\u1ec3m tra t\u1ea5t c\u1ea3 c\u00e1c c\u00e2y trong h\u00e0ng v\u00e0 \u0111\u00e1nh d\u1ea5u nh\u1eefng c\u00e2y b\u1ecb h\u1ea1i tr\u00ean s\u01a1 \u0111\u1ed3 v\u00e0 tr\u00ean c\u00e2y.<\/p>\n

C\u00e2y b\u1ecb h\u1ea1i \u0111\u00ad\u1ee3c x\u00e1c \u0111\u1ecbnh l\u00e0 nh\u1eefng c\u00e2y c\u00f3 l\u1ed7 s\u00e2u \u0111\u1ee5c tr\u00ean th\u00e2n (xem \u1ea3nh)<\/p>\n

T\u1ef7 l\u1ec7 c\u00e2y b\u1ecb h\u1ea1i \u0111\u00ad\u1ee3c t\u00ednh theo c\u00f4ng th\u1ee9c sau:<\/p>\n

S\u1ed1 c\u00e2y b\u1ecb s\u00e2u \u0111\u1ee5c<\/p>\n

T\u1ef7 l\u1ec7 c\u00e2y b\u1ecb h\u1ea1i (% ) = x 100<\/p>\n

T\u1ed5ng s\u1ed1 c\u00e2y \u0111i\u1ec1u tra<\/p>\n

\u0110i\u1ec1u tra \u0111\u00e1nh gi\u00e1 \u0111\u1ecbnh k\u1ef3 2 th\u00e1ng 1 l\u1ea7n, c\u00e1c s\u1ed1 li\u1ec7u \u0111i\u1ec1u tra \u0111\u00ad\u1ee3c x\u1eed l\u00fd tr\u00ean m\u00e1y vi t\u00ednh.<\/p>\n

II. K\u1ebft qu\u1ea3 \u2013 th\u1ea3o lu\u1eadn:<\/p>\n

Sau 6 th\u00e1ng v\u1edbi 3 k\u1ef3 \u0111i\u1ec1u tra \u0111\u00e1nh gi\u00e1, c\u00e1c s\u1ed1 li\u1ec7u thu th\u1eadp \u0111\u00ad\u1ee3c x\u1eed l\u00fd \u0111\u00e3 cho th\u1ea5y:<\/p>\n

– \u0110\u1eb7c \u0111i\u1ec3m sinh h\u1ecdc<\/p>\n

– Th\u1eddi gian s\u00e2u \u0111\u1ee5c th\u00e2n (Zeuzera coffea)<\/em> xu\u1ea5t hi\u1ec7n v\u00e0 g\u00e2y h\u1ea1i tr\u00ean tr\u00e0m b\u1eaft \u0111\u1ea7u th\u00e1ng 2 \u0111\u1ebfn th\u00e1ng 8<\/p>\n

-T\u1ef7 l\u1ec7 s\u00e2u \u0111\u1ee5c th\u00e2n (Zeuzera coffea)<\/em> ph\u00e1 h\u1ea1i tr\u00ean c\u00e1c lo\u00e0i Tr\u00e0m b\u00ecnh qu\u00e2n l\u00e0:<\/p>\n

– M.leucadendra<\/em> : 28%<\/p>\n

– M.viridiflora <\/em>: 9%<\/p>\n

–M.cajiputy<\/em> : 9%<\/p>\n

\u0110\u1ed1i v\u1edbi lo\u00e0i M. leucadendra<\/em>, t\u1ef7 l\u1ec7 ph\u1ea7n tr\u0103m s\u1ed1 c\u00e2y b\u1ecb h\u1ea1i c\u1ee7a t\u1eebng xu\u1ea5t x\u1ee9 (xem S\u01a1 \u0111\u1ed3 2, 3 v\u00e0 4) cho th\u1ea5y xu\u1ea5t x\u1ee9 1208L c\u00f3 t\u1ef7 l\u1ec7 b\u1ecb h\u1ea1i cao nh\u1ea5t (39%), \u0111\u1eb7c bi\u1ec7t l\u00e0 d\u00f2ng L14, t\u1ef7 l\u1ec7 b\u1ecb h\u1ea1i t\u1edbi (70%).<\/p>\n

Trong lo\u00e0i M. viridiflora,<\/em> 2 xu\u1ea5t x\u1ee9 1703 v\u00e0 1704 c\u00f3 t\u1ef7 l\u1ec7 b\u1ecb h\u1ea1i cao nh\u1ea5t (14%), v\u00e0 th\u1ea5p nh\u1ea5t l\u00e0 xu\u1ea5t x\u1ee9 1701 v\u1edbi t\u1ef7 l\u1ec7 2%.<\/p>\n

Ri\u00eang \u0111\u1ed1i v\u1edbi lo\u00e0i M. cajuputy,<\/em> trong 5 xu\u1ea5t x\u1ee9 c\u1ee7a\u00facth\u00ec xu\u1ea5t x\u1ee9 7A04 c\u00f3 t\u1ef7 l\u1ec7 b\u1ecb h\u1ea1i cao nh\u1ea5t (29%), th\u1ea5p nh\u1ea5t l\u00e0 7A03 (4%). 7 xu\u1ea5t x\u1ee9 c\u1ee7a Vi\u1ec7t Nam th\u00ec xu\u1ea5t x\u1ee9 7V02 l\u00e0 c\u00f3 t\u1ef7 l\u1ec7 b\u1ecb h\u1ea1i cao nh\u1ea5t (15%) v\u00e0 \u0111\u1eb7t bi\u1ec7t xu\u1ea5t x\u1ee9 7V07 th\u00ec kh\u00f4ng b\u1ecb h\u1ea1i.<\/p>\n

– \u0110\u1eb7c \u0111i\u1ec3m sinh h\u1ecdc (xem h\u00ecnh : S\u1ef1 bi\u1ebfn th\u00e1i c\u1ee7a s\u00e2u \u0111\u1ee5c th\u00e2n )<\/p>\n

Nh\u1eefng k\u1ebft qu\u1ea3 tr\u00ean b\u00ad\u1edbc \u0111\u1ea7u cho ph\u00e9p c\u00f3 nh\u1eefng nh\u1eadn x\u00e9t sau:<\/p>\n

C\u00e1c lo\u00e0i Tr\u00e0m trong v\u00ad\u1eddn gi\u1ed1ng \u0111\u1ec1u b\u1ecb s\u00e2u \u0111\u1ee5c th\u00e2n g\u00e2y h\u1ea1i nh\u00adng m\u1ee9c \u0111\u1ed9 thi\u1ec7t h\u1ea1i tr\u00ean t\u1eebng lo\u00e0i l\u00e0 kh\u00e1c nhau.<\/p>\n

Gi\u1eefa c\u00e1c xu\u1ea5t x\u1ee9 trong c\u00f9ng m\u1ed9t lo\u00e0i c\u0169ng c\u00f3 s\u1ef1 kh\u00e1c nhau r\u1ea5t l\u1edbn v\u1ec1 t\u1ef7 l\u1ec7 b\u1ecb h\u1ea1i.<\/p>\n

Th\u1eddi gian s\u00e2u \u0111\u1ee5c th\u00e2n d\u1ec5 m\u1eabn c\u1ea3m v\u1edbi thu\u1ed1c nh\u1ea5t l\u00e0 giai \u0111o\u1ea1n t\u1eeb tr\u1ee9ng n\u1edf th\u00e0nh s\u00e2u non.<\/p>\n

III – K\u1ebft lu\u1eadn v\u00e0 \u0111\u1ec1 ngh\u1ecb<\/p>\n

1. K\u1ebft lu\u1eadn<\/em><\/p>\n

Th\u1eddi gian s\u00e2u \u0111\u1ee5c th\u00e2n g\u00e2y h\u1ea1i b\u1eaft \u0111\u1ea7u t\u1eeb th\u00e1ng 2 \u0111\u1ebfn cu\u1ed1i th\u00e1ng 7.<\/p>\n

Trong ba lo\u00e0i Tr\u00e0m \u0111\u00ad\u1ee3c tr\u1ed3ng t\u1ea1i v\u00ad\u1eddn gi\u1ed1ng th\u00ec lo\u00e0i M. leucadendra<\/em> b\u1ecb s\u00e2u \u0111\u1ee5c th\u00e2n g\u00e2y h\u1ea1i n\u1eb7ng nh\u1ea5t.<\/p>\n

Trong lo\u00e0i M. cajuputy<\/em> th\u00ec lo\u00e0i c\u00f3 xu\u1ea5t x\u1ee9 t\u1eeb\u00facb\u1ecb s\u00e2u \u0111\u1ee5c th\u00e2n cao h\u01a1n l\u00e0 lo\u00e0i c\u00f3 xu\u1ea5t x\u1ee9 t\u1eeb Vi\u1ec7t Nam.<\/p>\n

Trong m\u1ed7i lo\u00e0i, gi\u1eefa c\u00e1c xu\u1ea5t x\u1ee9 c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t r\u1ea5t r\u00f5 v\u1ec1 t\u1ef7 l\u1ec7 c\u00e2y b\u1ecb h\u1ea1i.<\/p>\n

Th\u1eddi gian ph\u00f2ng tr\u1eeb hi\u1ec7u qu\u1ea3 nh\u1ea5t l\u00e0 v\u00e0o th\u1eddi \u0111i\u1ec3m tr\u1ee9ng n\u1edf th\u00e0nh s\u00e2u non.<\/p>\n

2. Ki\u1ebfn ngh\u1ecb<\/em><\/p>\n

Vi\u1ec7c \u0111i\u1ec1u tra \u0111\u00e1nh gi\u00e1 thi\u1ec7t h\u1ea1i c\u1ee7a s\u00e2u \u0111\u1ee5c th\u00e2n (Zeuzera coffea)<\/em> tr\u00ean c\u00e1c lo\u00e0i\/xu\u1ea5t x\u1ee9 Tr\u00e0m c\u1ea7n \u0111\u00ad\u1ee3c ti\u1ebfp t\u1ee5c trong nh\u1eefng n\u0103m t\u1edbi \u0111\u1ec3 c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c v\u1ec1 kh\u1ea3 n\u0103ng kh\u00e1ng s\u00e2u \u0111\u1ee5c th\u00e2n c\u1ee7a m\u1ed9t s\u1ed1 lo\u00e0i\/xu\u1ea5t x\u1ee9 tr\u00e0m.<\/p>\n

\u00e1pd\u1ee5ng bi\u1ec7n ph\u00e1p h\u00f3a h\u1ecdc trong vi\u1ec7c ph\u00f2ng tr\u1eeb s\u00e2u \u0111\u1ee5c th\u00e2n trong r\u1eebng Tr\u00e0m c\u00f3 hi\u1ec7u qu\u1ea3 th\u1ea5p, g\u00e2y \u1ea3nh h\u00ad\u1edfng x\u1ea5u t\u1edbi m\u00f4i tr\u00ad\u1eddng sinh th\u00e1i. V\u00ec v\u1eady, n\u00ean nghi\u00ean c\u1ee9u \u00e1p d\u1ee5ng c\u00e1c bi\u1ec7n ph\u00e1p ph\u00f2ng tr\u1eeb kh\u00e1c nh\u00ad bi\u1ec7n ph\u00e1p sinh h\u1ecdc, c\u00f3 th\u1ec3 mang l\u1ea1i hi\u1ec7u qu\u1ea3 cao, \u00edt \u1ea3nh h\u00ad\u1edfng \u0111\u1ebfn m\u00f4i tr\u00ad\u1eddng.<\/p>\n

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

1. Nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 gi\u1ea3i ph\u00e1p khoa h\u1ecdc l\u00e2m sinh l\u00e0m c\u01a1 s\u1edf n\u00e2ng cao s\u1ea3n l\u00ad\u1ee3ng r\u1eebng Tr\u00e0m. Lu\u1eadn \u00e1n ph\u00f3 ti\u1ebfn s\u0129 : Th\u00e1i Th\u00e0nh L\u00ad\u1ee3m 1996.<\/p>\n

2. Thu\u1ed1c b\u1ea3o v\u1ec7 th\u1ef1c v\u1eadt. NXB N\u00f4ng nghi\u1ec7p1995.<\/p>\n

3. C\u00f4n tr\u00f9ng h\u1ea1i g\u1ed7 v\u00e0 bi\u1ec7n ph\u00e1p ph\u00f2ng tr\u1eeb. NXB N\u00f4ng nghi\u1ec7p<\/p>\n

4. S\u00e2u b\u1ec7nh h\u1ea1i c\u00e2y \u0103n tr\u00e1i. NXB N\u00f4ng nghi\u1ec7p.<\/p>\n

SUMMARY<\/p>\n

Zeuzcra coffea<\/em>is an insect species that seriously damages Melaleuca<\/em> forest. This insect species does not only effect Melaleuca <\/em>growth but also wood quality. In serious case the trees died as being attacked by stem borers. Thus survey on damages caused by stem bores on Melaleuca<\/em> plantations is necessary.<\/p>\n

The report shows some results of the investigation on Melaleuca<\/em> plantation damages, dying rate of trees of affected species and provenances, damaging time and characteristics, proposed methods for stem bores control.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Cây Tràm \u0111­\u1ee3c tr\u1ed3ng \u1edf vùng \u0111\u1ed3ng b\u1eb1ng sông C\u1eedu Long có ngu\u1ed3n g\u1ed1c t\u1eeb Vi\u1ec7t Nam, úcvà m\u1ed9t s\u1ed1 n\u01a1i khác, bao g\u1ed3m các loài M. leucadendra, M.viridiflora, M.cajuputy. Trong \u0111ó, có m\u1ed9t s\u1ed1 loài\/xu\u1ea5t x\u1ee9 m\u1edbi th\u1ef1c s\u1ef1 có n\u0103ng su\u1ea5t cao và \u0111ã \u0111­\u1ee3c \u0111­a vào gây tr\u1ed3ng trên di\u1ec7n tích r\u1ed9ng. Tuy nhiên, tình hình sâu \u0111\u1ee5c thân gây h\u1ea1i trên nh\u1eefng loài\/xu\u1ea5t x\u1ee9 này h\u1ebft s\u1ee9c nghiêm tr\u1ecdng.<\/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\/8645"}],"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=8645"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8645\/revisions"}],"predecessor-version":[{"id":19273,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8645\/revisions\/19273"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=8645"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=8645"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=8645"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}