Duong Trung DQng vd Dig Tap chi KHOA HOC & CONG NGH$ 138(08): 11-17
NGHIEN c u t ! KHA NANG SINH TRlTOfNG CUA MOT SO G I 6 N G CHE PHIJC VU CHO TUYEN CHON VA LAI TAG GIONG MOfI
TAI TRUOfNG DAI HQC NONG LAM T H A I NGUYEN
Dinmg Trung Dung , Le Thi Kieu Oanh Tnc&ng Bai fiQC Ndng Ldm - DM Thdi Nguyen TOM T A T
Thi nghiem nghien ciiu ve dSic diem hinh thai, kha ndng sinh trudng vdtlnh hinh sdu hai chinh cua cac gidng che dugc thuc hiin tai Trudng Dai hpc Ndng Idm Thai Nguyen trong ndm 2014. Phuong phdp theo ddi theo quy trinh ky thudt, sd IOTCN-745/2006 vl khao nghiem gid trj canh tdc vd gia tri sir dung gidng che. Ket qua dd xdy dung dugc vudn vat lieu gdm 27 gidng che phuc vy cho nghien ciiu va lai tao. Mpt so dac diim sinh trudng, hinh thai ddc trung phan biet cdc gidng chi, chi thj cho chat lupng che thdnh pham dd dugc xdc djnh va md td. Thdi gian sinh trudng bup/ndm tir 90-120 ngdy ddi vdi chi mdi trdng. Cd 2 Ioai sdu h^i dnh hudng true tilp din sinh trudng vd phat triln cua cay chi: Rdy xanh hai chi (1.0- 2.6 con/khay) vd bo cdnh to (0.8 - 2.3 con/bup).
Tii- khda: Thu thdp, hinh thai, sinh trudng, giong che, sdu hai MODAU
Trong san xudt ndng nghiep, gidng cd vai trd rat quan trpng trong viec nang cao nang sudt, san lugng va chdt Iugng san pham. Gidng dugc coi la tien de eiia san xudt. Id tu lieu khdng the thay the trong sdn xuat ndng nghiep. Ddi vdi sdn xudt che, gidng che cd y nghTa quan trgng trong thdm canh tang ndng sudt, ehat iugng sdn pham. Che la cdy Idu ndm, trdng mpt Idn cho thu hoach nhilu ldn, trong thdi gian dai tii' 40-50 ndm, ddu tu trdng che eao hon nhieu lan so vdi cac cdy trdng ngan ngay khae. Khong the pbd di trdng lai hang nam duge. Mgi quylt djnh diing ddn hay sai lam ve gidng che se cd anh hudng den sy phat trien ciia vudn che trong thdi gian rdt dai. Do vdy d tat ca eac nude trdng ehe, gidng che tdt Id bien phap dugc quan tdm hang dau, dupc CO! Id khdu dot phd nhdm ndng cao san lugng va chdt lupng che. Chinh vi vdy chiing tdi thyc hien nghien ciiu kha nang sinh trudng ciia mdt sd gidng che phuc vy cho tuyen chgn va lai tao gidng tai trudng Dai hgc Ndng Idm Thai Nguyen.
Budc ddu danh gia khd ndng sinh trudng phat triln eua mdt so giong che, xay dung thanh vudn tap dodn cdc gidng che phyc vu cho chgn tao gidng ehe mdi.
Tet' 0983 753356, Emait Irungdung tuiifi^gmail com
VAT LIEU, N O I DUNG VA PHUiONG P H A P NGHIEN CCm
VSt lifu nghien cuu
27 gidng ehe mdi thu thap tir Trung tam nghien ciiu va phdt trien che - vien KHKT ndng lam nghiep mien nui phia Bac Noi dung nghien ciru
- Nghien euu ddc diem hinh thai cua mdt sd gidng che
- Nghien ciru kha ndng sinh trudng ciia mpt sd gidng che
- Nghien ciiu tinh hinh sdu hai chinh Chi tieu nghien cihi va phutmg phap theo doi:
- Dudng kinh than cdy: Theo phuang phdp do ehu vi than eay.
- Chieu cao eay: Xae dinh chieu cao cay tinh tir mat ddt den vi tri cao nhat ciia tan cay.
- Dp cao phan canh: Do tir mat ddt den diem phdn canh ddu tien.
- Sd canh cdp 1: Dem tat ea eac cdnh cdp 1 tren thdn cdy.
- Mau sac Id: Xdc dinh mau sac la theo cac mau: Xanh, xanh nhat, xanh vang, xanh dam.
- Phien la: Xde djnh phien la: Phdng nhdn, gd ghe, Idi Idm.
- Rang cua ciia ia: Xdc djnh theo mirc dp day, thua, ndng, sau
- Chieu dai la: Do tir dau la den chdp la.
11
Duong Trang Dung vo Dtg Tap chl KHOA HOC & CONG NGHE 138(08): 11-17 - Chilu rpng la: Do ch6 rang nhit ciia phi€n la. - So lieu tho duoc tinh toan va xir Iy tren - Dien tich la: Theo cong thuc tinh nhanh D x Excel va IRRISTAT 5.0.
R X 0,7. KET QUA VA THAO LUAN - Chieu dai blip che: Bo chilu dai 30-50 blip Dac dilm hinh thai ctia cac giong che lly tri so trung binh. Danh gia dac diem hinh thai cCia cac gi6ng - Kh6i lirong blip I torn 2 la ( gam/bup) can cay trong noi chung va cay che noi rieng la tren 6 thi nghiem lOOg biip che, dim so blip mot cong viec hit siic quan trpng. Dac diem trong 100 g do. Tir do, quy ra kh6i lirpng I hinh thai khong nhttng de phan biet sir khac blip theo cong thiJc. Theo doi theo lira hai nhau giira cac giong, ma con chp thiy dirpc 100(g) kha nang thich nghi cua gi6ng d6i vpi mpi Khdi lugng 1 bup = _ ^ ^ - ^^^^,g ,5,g,
- Ti le blip mil xde: Can ngdu nhien lOOg che Thu thdp va trdng cae giong t^i yuan tieu ban tuai, dim tong so biip, so bup cd tdm rdi quy cho thdy chilu cao cdy sau trdng mgt nam ra % blip cd tdm, theo ddi theo lira hai chinh biln ddng tir 40.5 - 52.5cm. Cac gidng khac _ , , . r . . .- r . . . ,ay\ r ' u- "hau CO chilu cao phdn canh khac nhau.
- Tl 1? bup CO tom, bup mu xoe (%) = (so bup . '^ -
. ,. ,^; - u- \ M\f\ Chieu cao phan canh bien dong tu 4 - 12cm.
co tom/tong so bup) x 100 , r ; ° Sd canh cap 1 tren cay bien dong tu 3- 7 - Mirc dp Idng tuyet: Xac djnh theo 3 muc ^.^j^^^.y ^dy che cd la moc each tren canh Nhilu tuylt: Tuylt phu day dtdm vd Id 1, la2. che, ngudi ta chia la che ra lam 3 Ioai: La vay Tuyet trung binh: Tuyet phii day d tdm va la 1. dc, la ca vd la that. Cac gidng che cd hinh thai Tuylt it: Tuylt phii day d tdm va it d la 1. '^' f"^^' ^^^ '^ ^^^^ "'^^"- ^a che Id chi tiiu quan trpng dl phan biet gidng. Dgc dilm la che cd lien quan den khd nang sinh trudng, - Khd ndng sinh trudng:
Xac dinh thpi gian bit diu sinh tmong va thiri ;^|,j „j„j ^|,„' „3„g ^„., a,k h^gci^'^ini gian ket thuc sinh trudng trong ndm, che. Thdng thudng nhu'ng giong che cd la to,
Phu-ong phap xir ly so lieu. bong, cd dp gd ghi cao thudng cd kha ndng cho - Sd lieu trong thi nghiem dugc xii ly bdng ndng suat cao. Qua theo doi ddc dilm hinh thai phuang phap trung binh chung sd hgc. Ia chiing tdi thu dugc kit qua d bang 2:
Bang 1: Bdc diem hinh thai mot so gidng che
~ ~ ~ C C ^ ^^ CC ^ ^ T ^ " ^ " ' " S "-Z canh C l T T Ten giong Cay P^__^ ^ ,
' ' (cm) (ciinb) < " " ' (cm) (cinh) 1
i j 4 S 6 V 8 1 10 II l i 13
PHI PHS PH9 PHIO PHII PHI2 PHM Kim tuyen Tir quy xuiin Keo am tich LDPl LDP2 Bat lien Phuc van tien
50.5 45.6 46.5 47.5 45.7 46.8 44.6 46.8 43.5 40.6 45.4 46.5 44.5 45.7
8 7 8 10 9 9 10 12 II 6 6 7 9 8
4 4 4 3 3 3 4 5 5 5 5 4 3 3
15 16 17 13 19 20 21 22 23 24 25 26 27
Ngoc thuy Hung dinh bach PTIO PT95 LCTI Shan chit tiln Shan lung phin TRI777 YABUKITA KANAYAMIDORY IA
Trung du Trung du tim
46.5 45.5 46.5 45.0 43.5 50.5 52.5 47.6 43.5 40.5 45.5 43.7 45.5
8 9 10 10 14 16 12 12 6 4 8 10 11
4 5 5 6 4 3 4 4 6 7 4 4 4 Chi chii: CC. Cdy: Chieu cao cdy; CC phdn cdnh- chieu cao phdn cdnh: So cdnh Cl: so cdnh cdp I
Dirong Trung Dung vd Dtg Tap chi KHOA HOC & CONG NGHE 138(08): 11-17 Bang 2: Ddc diem hinh thdi Id cda mgt so gidng che
T T 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
TSn giong PHI PHS PH9 PHIO PHU PH12 PHM Kim tuyen T u quy xuan Keo am tich LDPl LDP2 Bat tien Phuc van tien Nggc thiiy Hung dinh bach PTIO PT95 LCTI Shan chdt tiln Shan tiing phln TR1777 YABUKITA KANAYA MIDORY IA
Trung du Trung du tim
Mau sac Xanh ddm Xanh dam Xanh dam Xanh dam Xanh dam Xanh dam Xanh dam Xanh vdng Xanh nhat Xanh dam Xanh sang Xanh vang Xanh nhat Xanh nhat Xanh vdng Xanh dam Xanh ddm Xanh dam Xanh vdng Xanh vdng Xanh vang Xanh den Xanh dam Xanh dam Xanh vdng Xanh vdng Xanh vdng
Dang la Bau due Hinh trung Hinh trimg Hinh trimg Hinh trimg Hinh trimg Hinh trimg Bau due Bdu due Thudn dai 0 van 0 van Thudn dai Bau due Bau due Bau due Thudn dai Thudn dai Thudn ddi Thudn dai Thudn dai Thudn dai Thudn dai Bdu dyc Thudn dai Bdu due Bdu dyc
Rdng cua Sau deu, sdc Thua Sdu deu Thua ndng Sau khdng deu Ndng day deu Sau khdng deu,day Sau khdng deu Sdu diu Ddy, Sau khdng deu Sau day Thua sau khdng deu Thua sau khdng deu Thua sau khdng deu Thua sau khdng diu Ddy sau khdng deu Day sau khdng deu Sau deu Sau deu Thua sau khdng dSu Thua,sau khong deu Day.sau khdng deu Sau deu Khdng deu Day,sau khdng deu Day.sau khdng deu Day khdng deu Sau day khdng diu
Phien la Go ghe G d g h e Go ghi G d g h l G d g h l G d g h l G d g h e G d g h e G d g h l Gd ghe G d g h l G d g h l Go ghe Gdghl G d g h l G d g h l G d g h l G d g h l Gd ghi Gd ghe G d g h l Go ghe G d g h l Gd ghe Gdghe Gdghe Gd gh§
- Hinh dgng va mau sac Id che:
Cac gidng che khac nhau cd hinh dang va mau sac Id khae nhau. Ket qua nghien ctiu d bang tren cho thdy: Cac gidng che khac nhau cd mau sac Id, dang la, rang cua khac nhau. Tuy nhien mat tren phien la deu gd ghe gidng nhau.
- Ve rdng cira cua Id che: Cdc gidng ehe khac nhau cd cac dang rdng cua khac nhau, dang sdu diu, dang ndng khdng diu, dang day khdng diu, dang thua khdng diu.
- vi do go ghe cua phien la: Kit qua d bdng ciing eho thdy tdt ea eac gidng che diu cd philn Id gd ghe, ddy Id mdt trong nhii'ng bieu hien vl la cua nhitng cay che cd khd ndng cho ndng sudt cao.
Cdc gidng che khac nhau cd kich thudc Id che khac nhau Ve kich thudc la che: Sd lieu thu dupc cho thdy: Chieu dai la bien ddng tir 6.0 -
13.5cm, chieu rdng cua la bien dpng tir 3.0 - 5.0cm. Dien tich la biln ddng tir 14.70 - 42.50 cmVla. Ve sd ddi gan chinh: Tdt ca eac gidng deu cd sd ddi gan ehinh the hien dac diem ciia gidng che cd tii' 5-7 den 10-12 ddi gdn chinh/Ia.
Kha nang sinh trirdng mot so giong che Thdi gian sinh trudng bup cua cay che dai hay ngan tuy thudc vdo dieu kien ngoai canh (nhiet dd, am dp, Iugng mua), ky thudt canh tdc va gidng che.
13
Duong Trung Dung vd Dtg Tap chi KHOA HOC & CONG NGHE 138(08): 11-17 Bang 3: Kich ihu&c Id, s6 ddi gdn chlnh ciia rrigl sd giong che Ten gidng Chi€u ddi
a (cm) C.r<ing Id (cm)
Di^n tich
Id (cm') Dai/rdng S6 ddi gdn chtnh (ddi) 1
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
PHI PHS PH9 PHIO PHII PHI2 PH14 Kim tuyen Tir quy xuan Keo am tich LDPl LDP2 Bit tien Phuc van tien Ngpc thiiy Himg dinh bach PTIO PT95 LCTI Shan chit tiln Shan lung phin TRI777 YABUKITA KANAYA MIDORY IA
Trung du Trung du tim
8.0 9.0 9.0 8.5 10.5 100 10.0 7.5 9.0 8.0 11.0 95 9.5 10.5 7.5 10.0 9.5 12.0 7.0 13.5 12.0 95 70 6.0 9.0 9.0 9.5
4 2 4.5 4.0 3.5 4.0 4.5 5.0 3.5 3.5 4,0 4.0 4.0 5.0 5.0 3.2 3.5 4 0 4.5 3.5 4.5 5.0 35 4.5 3.5 6.0 55 60
23.52 28.35 25.20 20.82 29.40 31.10 35.00 18.37 22.05 22.40 30.80 26.60 33.25 36.75 16.80 24.50 23.75 37.80 17.15 42.50 42.00 23.27 22.05 14.70 37.80 34.65 39.90
1.90 2.00 2.25 2.43 2.62 2.22 2.00 2.14 2.57 2.00 2.75 2.37 1.90 2.10 2.34 2.86 2.50 2.66 2.00 1.75 2.40 2.71 1.56 2.86 2.00 2.00 1.92
6-7 6-7 7-9 7-9 5-7 6-8 6-8 7-9 6-8 5-7 6-8 6-8 7-9 6-8 5-6 6-S 6-8 6-7 6-8 10-12
5-7 5-7 6-8 6-7 8-9 6-7 8-9 Cdc gidng che khac nhau cd thdi gian sinh
trudng bup trong ndm khde nhau. Thudng thi nhung gidng che cd thdi gian sinh trudng blip dai, se cd kha ndng cho ndng suat cao hon nhiJng gidng cd thdi gian sinh trudng biip ngan Bup che Id san pham thu hotich ciia san xudt che. Tir nguyen lieu biip 1 tdm 2 la hoac 1 tdm 3 Id ngudi ta che bien ra cac loai che klidc nhau. Chdt Iugng che thanh pham phu thupc vdo kT thudt che bien, kT thuat canh tac vd dac biet la phy thudc rat nhieu vao giong.
Mdi gidng che khac nhau cd dac dilm hinh thai va thanh phdn sinh hod blip che khac nhau.
Theo ddi thdi gian sinh trudng blip chung tdi thdy cac gidng khac nhau cd thdi gian sinh trudng blip khac nhau. Thdi gian sinh trudng biip cua che bien dgng tir 90 ngay din 120 ngay.
14
Khi nghien cuu kich thudc va khdi Iugng bup cho thdy: Bup che 1 tdm 2 la dat chat lugng tdt cd chieu ddi biip tu 4,0cm den 6,8cm, khdi Iugng bup dat tir 0,30 gr/bup den 0,65gr/bup, trong dd mdt sd gidng che cd khdi nhd tii 0.3gr din 0.4gr. Bup che nhd la ddc diem, day cung la CO sd khi che bien che xanh, se t^o ra sdn pham cd ma ehe thanh pham nhd, xodn deu tao thdnh ehe xanh chat Iugng cao do bup che nhd deo, dai nen khi vd che khdng bi ddp nat.
Ve mirc dp long tuyet: Mirc do Idng tuyet tren blip non Id chi tieu dae trung cda bien chiing che Shan. Nhirng cdy che cd ngudn gdc nai cd dja hinh eao hoac viing khi hdu I^nh thi ed nhieu Idng tuyet d tdm che va phan cuong, la non. Thdng thudng nhiJng cay che biip.co nhilu Idng tuylt khi chl bien thi chdt Iugng sdn pham ehe xanh rat tdt
Duong Trung Dung vo Btg Tap chl KHOA HOC & CONG NGHE 138(08):
T T 1 2 3 4
5
6 7 8 9 10 11 12 13 14 15 16 17 IS 19 20 21 22 23 24 25 26 27
Bang 4: 77|<T/
Tgn g i l n g PHI PHS PH9 PHIO PHIL PHI 2 PHM Kim tuyen TCr quy xuan Keo am tich
LDPl LDP2 Bat tien Phiic van tien
Ngoc thuy Himg dinh bach
PTIO PT9S LCTI Shan chit tiln Shan lung phin TRI777 YABUKITA KANAYA MIDORY
IA Trung du Trung du tim
gian sinh In/cmg bup vd ddc diem Thdi gian ST
(ngiy) 120 120 120 120 120 120 120 110 110 110 120 120 90 90
no no
120 120 90 90 90 90 110
no
120 120 120
Chieu dai bOp (cm)
5.7 5.2 5.S 5.3 5.5 5 7 5.0 6.2 5.3 5.2 4.8 5.0 5.0 5.4 5.0 5.0 4 S 5.5 6.0 6.8 6.3 5.5 4.7 4.0 5.6 4.8 5.4
cud bup che Khoi luong blip (g/biip)
0.52 0.45 0.43 0.48 0.44 0.46 0.50 0.47 0.45 0.35 0.32 0.43 0.40 0.42 0.42 0.45 0.47 0.44 0.40 0.65 0.60 0.50 0.42 0.30 0.40 0.37 0.40
Mirc dp l6nE tuyet
•t tuyet il tuyet it tuylt it tuylt it tuylt it tuylt it niylt Nhieu tuyet
it tuylt Nhieu tuyet
it tuyen it tuylt it tuylt Nhieu tuyet Nhieu tuyet Nhilu tuylt it tuylt it tuylt Nhieu tuyet Nhieu tuyet Nhieu tuyet Nhieu tuyet Nhieu tuyet Nhieu tuyet it tuylt it tuylt it tuylt Mgt so loai sau hai chinh
Kha nang chdng chiu eua eac gidng che vdi dilu ki?n ngoai canh bdt thuan vd sau benh la mpt chi tieu hit sire quan trgng anh hudng den sinh trudng, nang sudt, chdt lugng ciia giong. Kha ndng ndy phy thudc vao ban chat di truyin cua giong, ky thuat trdng trgt vd cham sdc.
Qua theo ddi sdu hai tren cac gidng che thu duge kit qua d bang 5: Sd ray xanh hai che bien ddng tu 1.0- 2.6 con/khay. Bp cdnh ta biln dpng tir 0.8 - 2.3 eon/biip che.
KET LUAN VA KIEN NGHI Ket luan
- Da thyc hien trdng dugc 27 gidng che phuc vu lai tao va tuyen chpn gidng mdi.
- Cac gidng che khac nhau cd dac diem hinh thai khac nhau, Ddc diem hinh thai Id chi tieu de phan biet gidng.
Thdi gian sinh trudng ciia cac gidng bien ddng tir 90-120 ngay/nam. Chieu dai bup tir 4,0cm den 6,8cm, khdi luong bup dat tir 0,30 gr/biip den 0,65gr/biip.
- Mdt sd sau hai ehinh: Sd ray xanh hai che bien dpng tir 1.0- 2.6 con/khay. Bp cdnh ta bien ddng tir 0.8 - 2.3 con/biip che.
Kien nghi
Tiep tuc cham sdc, lam cd, theo doi tinh hinh sinh trudng ciia cac gidng sau trdng.
15
Ducmg Trung Dung vd Dtg
TT 1 2 3 4 5 6 7 8 9 10 II 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
Ten giong
PHI PHS PH9 PHIO PHII PHI2 PHI4 Kim tuyen Tu quy xuan Keo am tich LDPl LDP2 Bat tien Phiic van tien Ngpc thuy Hung dinh bach PTIO PT95 LCTI Shan chat tien Shan lung phin TRI777 YABUKITA KANAYA MIDORY IA
Trung du Trung du tim
Tapch KHOA HOC & CONG NGHE
Bang 5: Mot sd lodi sdu vd ty R3y vanh (con/khay) 1.2 1.1 1.2 1,1 1 0 1 4 1 5 1 4 1.5 2.2 2.5 2.6 1.5 1.8 1.8 1.4 1.7 1.8 1 4 2 4 2.6 2,0 2,1 1.8 1,6 1.4 1.4
leld non bi hai Bo canh to' (con/biip)
1.6 1.3 1.3 1.2 0.9 1.0 1.4 1.5 1.5 1.7 2.0 2.3 1.2 1.5 1.3 1.6 1.0 0.8 1.5 2.3 2.1 1.8 1.1 1.3 1.4 1.2 1.0
138(08): 1 1 - 1 7
S6 la non bi hai
(%) '
2.51.8 1.8 1.6 1.6 1.6 1.8 2.3 1.8 2.4 3.2 3.2 1.8 2.0 2.0 2.3 1.8 1.8 2.0 3.6 3.2 3.0 2 2 2.5 2.0 1.8 1.6 TAI LIEU T H A M K H A O
1. Nguyen Thi Ngoc Binh (2002), Nghien cihi ddc diem hinh thai gidi phdu Id, hom mgi so gidng che chgn Igc a Phu Ho nhdm ndng cao hieu qud sic dung giong, Luan an TS khoa hoc Ndng nghiep - Vien KHKTNN Viet Nam, Ha Npi, 2. Hoang Cu - Nguyen HOu La (2003), "Dac dilm sinh hoa ciia mdt sd gidng che Shan chon loc tai Phil Hp", Tgp chi Ndng nghiep vd phdt Irien ndng ihunT5/2003.
3. Nguyen Van Hien (2000), Chon gidng cdy trong, Nxb Giao due, Hd Npi.
4. Dam Ly Hoa (2001), Nghien cihi khd ndng chiu han ciia mdi so gidng che mdi chgn lgc, lai tgo vd nhdp ngi d Phii Hp, Ludn an TS Nong nghiip, ViSn khoa hpc ky thuat Ndng nghidp Vi6t Nam, H^Ndi
5. Dd Ngoc Quy, Le Tdt Khuang (2000), Gido trinh cdy che sdn xudl che hien vd lieu thu, Nxb Ndng nghiep. Ha Ndi.
Duong Trung Dung vd Dig Tap chf KHOA HQC & CONG NGHE 138(08): 11-17
SUMMARY
GROWTH AND YIELD PERFORMANCE OF SOME SELECTED TEA VARIETIES FOR SELECTION AND BREEDING PROGRAM AT THAI NGUYEN UNIVERSITY OF AGRICULTURE AND FORESTRY
Duong Trung Dung*, Le Thi Kieu Oanh College ofAgnculiure and Forestry - TNU Research on morphological characteristics, growth and pest and disease infection of tea varieties collected was conducted at Thai Nguyen University of Agriculture and Forestry in 2014. The experimental methods based on the technical process No. IOTCN-745/2006 about testing values of cultivation and usage of tea variety. As a result, a collection of 27 tea varietes was being grown in the material field for research and breeding programs. Some morphological characteristics, distinguishing features among varieties, mdicators for quality of tea product was indicated and discribed. The bud growth period per year ranged 90-120 days in the early stage of cultivation.
Two kinds of insect, including Green aphid (1.0-2.6 indlviduals/tray) and Thysanoptera (0.8 -2.3 individuals/bud) affected grovrth of tea plants.
Key words: Collection, morphology, growth, lea varieties, pests.
Ngdy nhdn hdi:2S/02/20l5: Ngdy phdn bifn 14/3/20} 5; Ngay duyet ddng: 30/7/2015 Phan biin khoa hoc: PGS. TS Nguyen Viel Hung - Truang Dgi hgc Ndng Ldm - DHTN ' Tel 0983 "."'JiJ'fi, Email, tnmgdiing.luajta^mail a
