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茄株上共食群之空間分布型
169
表六、依
Taylor
’
s power law
模式估算比較大里茄園不施藥區重要害蟲蟎類及不同共食群之
最適取樣數
(
D
= 0.2)
1)
Table 6.
Optimal sample size for key herbivores and feeding guilds in an eggplant plot that was
not treated with pesticide according to Taylor
’
s power law (
D
= 0.2)
1)
Mean density
Sample size for herbivores families
Sample size for feeding guilds
Thripi-
dae
Aphidi-
dae
Tar-
sonmidae
Tetrany-
choidea
Aley-
rodidae
Chewers
Sucking-
insects
Sucking-
mites
Spire leaf
5
50 276
579
-
-
-
153
586
10
28 185
349
-
-
-
117
370
20
15
123
211
-
-
-
89
234
40
8 83
127
-
-
-
68
148
50
7 73
108
-
-
-
62
127
100
4 49
65
-
-
-
47
80
200
2 32
39
-
-
-
36
51
Expand leaf
5
315 701
328
9
275
806
103 21,791
10
257 649
188
3
209
607
123
1,399
20
210 600
108
1
159
457
147
898
40
172 555
62
1
121
344
175
576
50
161 542
52
1
111
314
186
499
100
131 501
30
1
84
237
221
320
200
107 464
17
1
64
178
264
206
Flower
5
45 580
305
-
-
-
116
311
10
21 413
233
-
-
-
173
251
20
10 293
177.6
-
-
-
257
202
40
5 209
136
-
-
-
383
163
50
4 187
124
-
-
-
440
152
100
2 133
95
-
-
-
649
127
200
1 95
73
-
-
-
967
99
1)
“
D
”
denotes the predetermined half-width of the confidence limits for the estimation of the mean.