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臺灣農藥科學 第
1
期
168
列於表六。針對單一種族群而言，調查展
開葉上蟲蟎密度時所需的取樣數最多，以
feeding guild
分群者，也是以展開葉的取樣
數最多。當展開葉上平均密度達
10
隻時，
調查薊馬時需取
257
片的展開葉，蚜蟲則需
649
片為最多，粉蝨需
209
片、細蟎需
188
片，葉蟎僅需
3
片葉；當花上密度為
5
隻時，
估計薊馬密度時需取
45
朵花、蚜蟲需
580
朵，細蟎則需
305
朵，此與空間分布呈聚集
型或逢機型有關。以共食群整合各族群來
表五、臺中市大里茄園施藥區植食性種類不同共食群
(feeding guild)
在茄葉及花上之
Iwao
’
s
m*-m regression
及
Taylor
’
s power law
的係數值
Table 5.
Parameters of Iwao
’
s m*-m regression and Taylor
’
s power law for the analysis of different
herbivorous feeding guilds found on leaves and flowers in an eggplant plot treated with
pesticides
Feeding
guilds
n
Iwao’s m*-m regression
Taylor’s power law
α
β
R
2
P
a
b
R
2
P
Spire leaf
Sucking-
insects
25 1.072
(0.565)
1)
1.146
(0.209)
0.581 0.000
0.640
(0.091)**
1.220
(0.088)**
0.880 0.000
Sucking-
mites
25 14.704
(05.019)**
2)
1.485
(0.096)**
0.903 0.000
1.358
(0.216)**
1.618
(0.067)**
0.956 0.000
Expanded
leaf
Chewers 12 0.066
(0.163)
5.588
(0.520)**
0.920 0.000
1.478
(0.246)**
1.430
(0.096)**
0.956 0.000
Sucking-
insects
28 -0.484
(6.269)
3.533
(0.209)**
0.918 0.000
1.179
(0.206)**
1.892
(0.078)**
0.958 0.000
Sucking-
mites
28 31.959
(14.942)**
2.961
(0.196)**
0.899 0.000
1.933
(0.259)**
1.759
(0.076)**
0.955 0.000
Flower
Sucking-
insects
25 -0.502
(1.229)
1.561
(0.164)**
0.797 0.000
0.580
(0.188)**
1.394
(0.106)**
0.884 0.000
Sucking-
mites
25 0.292
(1.114)
1.288
(0.295)
0.453 0.000
1.317
(0.125)**
1.322
(0.104)**
0.874 0.000
1)
Standard error values are listed in parentheses.
2)
** denotes significant difference in Student-
t
test results at a level of
α
= 0.05. Null hypothesis of
α
and log(a)
parameters are 0;
β
and b are 1.