Impact Of Host Plant Xylem Fluid On Xylella Fastidiosa Multiplication ...

Table 2. Parasitism and emergence by G. ashmeadi on the GWSS eggs exposed to the daily stepwise temperature regime (10,
11, 12, 13ºC - changing at 6h intervals) for 15 to 140 d.
Storage time No. egg masses No. eggs Parasitism
(mean % ±SE)
Emergence
(mean % ± SE)
15 d 7 88 74.99 ± 3.20 a 68.25 ± 3.11 a
20 d 11 106 76.98 ± 9.26 a 67.18 ± 9.23 ab
25 d 6 69 77.76 ± 6.58 a 57.15 ±13.49 ab
50 d 21 226 47.75 ± 8.15 b 41.89 ± 8.05 bc
60 d 23 208 37.27 ± 7.49 b 28.69 ± 6.61 c
65 d 13 126 44.36 ± 8.69 b 22.58 ± 7.11 c
80 d 31 253 11.79 ± 4.68 c 7.31 ± 3.84 d
95 d 17 193 4.25 ± 2.40 c 1.90 ± 0.89 d
140 d 9 96 2.02 ± 1.38 c 2.02 ± 1.38 d
F = 14.934 F = 13.661
df = 8,137 df = 8,137
P < 0.001 P < 0.001
Means within a column followed by different letters were significantly different at the significant level of 0.05 (SAS Proc
GLM with LSD). Data were square-root transformed before analysis.
% Emergence
45
40
35
30
25
20
15
10
5
0
4 ºC
4.5 ºC
*
10d 20d 25d
Storage time (d)
% Emergence
80
70
60
50
40
30
20
10
0
4: 6: 8 ºC = 8: 8: 8 h
4.5: 6.0: 7.5 ºC = 8 : 8: 8
10 d 15d 20d 25d
Storage time (d)
Figure 3. Percentage emergence of G. ashmeadi from
GWSS eggs stored at constant temperatures for 10-25 d.
Bar marked by an asterisk represents a significant
difference (P < 0.05).
Figure 4. Percentage emergence of G. ashmeadi from the
GWSS eggs stored at stepwise temperatures for 10-25 d.
Bar marked by an asterisk represents a significant difference
(P < 0.05).
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