ĐẶT VẤN ĐỀ

 
!"#$%&"'"()
*+,+-."+%
/#012(345+6
78594&)*:4
%;40+<
44,/85(8+%
/=>5*(>(
?@+A''BCDE(F
@5(,G#0(,G
7+)"=">+'H1">#I"
J"=(EH!
44G"46"+
4=%;40
JKLM"J"NOPPQR(+7D+
4'6O";&
ST21">(
6+)#0+U0#0
9)"G%DS0(
#V8"46"+4
#T&>&%21">
!"#$%G%D=U6(
=')"7'+
D+G+%++)
+W9
:!,=X"#G%71G1=
(3/8+)+-7()"
#%8%/+95+6
/,U%%H3#G%7CD

46"4+1G85'-(1">1X
,#UH#5+6
85&2+1U'G_]SG(
L*J
d J"<%T9D."E"
(4#e"<G%D+)]
]9"46"4
EH!
dS'>"(1G+a71U
'G
dJ@&cG/71U
'G/0)"
Điều tra trên vườn ươm
dJ0<%TG+G/)"(@+7
D0<%fTG+G(@&)"f
/('@TQ
O
NO1OR(;85
cgT(;'f[
O
h&1O&i
jO
O
S)"k+X4G(85
(()">UTG
+G
Điều tra trên rừng trồng
d S)"K"0)""0/
]."'+E#"+W2
+1I'G(,%E+a

&="8"_
Tỷ lệ cây bị sâu hại_k4G8"ko85
4G4=;85)"1
GKTX_
J,__854G8"
_;85)"
q0."U)""1rV=%!
)sLss
Chỉ số bị hại bình quân_K%D
%%4].".")+6TX8"_
J,_to_&854G8""
4]
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_;85)"
_>%4G>N7%i
QR
Mức độ bị hại_'W=&854G4]."
tucPo :#mK
cPovtuclo :4Gw
clovtuOlo
:  4G    "
4]
OlovtulPo :4G3
tplPo :4G>3
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KẾT QUẢ NGHIÊN CỨU
c 1. Kết quả thống kê diện tích ong u
bướu gây hại bạch đàn tại vườn ươm và
rừng trồng
^4T 

Bảng 2:Jk4G+X4G+7
DT %M"D&]
SG+:T %JJ&L*
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s
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J
OhOPcP
J
fhOPcP
J
QhOPcP
J
yhOPcP
J
cPhOPc
P
J
cchOPc
P
L
NoR
t4
NoR
L
NoR
t4
NoR
L
No

4GcOo]SG+L*JDW
k4GQOo(X4Gcgo+O(
0QU1"5k4Gcgo(X
4GgPo+H'!ykcPo(
X4GPOo0cck4G
cjo(X4GcPo

1.2. Kết quả điều tra tỷ lệ bị hại và mức
độ bị hại tại rừng trồng
d L >% "  46"     Z[
0O0Q+
y0cc=fG/_DL*(:
(aJGx"9&]SG(@G
/)"fT=""I(;yT=""I
>k4G+X4GT="
"IG/DL*T=""Ick
4GQ[o(X4GOco+O(
Qk4Gyfo+X4GGlPo
0yk4GOco(X4GcPo(
0cck4Gfco(X4G
cjo(T=""IO(fFDWk4G
+X4G9ODf(Q
+0yk4G+X4G>%
DcP(ccJ:+aJx"
=T=""Ik4G+X4G
9ODf(Q+0yk
4G+X4G>%DcP(cc
d L >% "  46"     Z[
0O0Q+
y0cc=fG/_JT(La

TÀI LIỆU THAM KHẢO
c LM"J"NOPPQR|6
1">  +  4    
J%T%}L/T
T85c(clygdclyy
O L  M" J"  +  "~  M"  ^F
NOPPgR J"/  ( 1">1X 5 G"
#V8"46"+4
J%T%}L/TT85
O(jydgQ
f •#€"%}•LNOPPyRJ1
8"'K8      K  ‚  :''K
NCK%KR  ‚  ƒ'  „  K„
'84"  K'8  •"  ‚  JKKK'
J1"KcNlRfPPdfPQ
Q |K+€|'NOPPjRsK‚K
8K8K8‚‚K"KKK
‚K888'K%K'‚K8|
{+K+K„‚‚K8%K88…|(OPPj