A Laboratory Assessment of Two Local Strains of the Beauveria bassiana (Bals.) Vuill. against the Tetranychus urticae (Acari: Tetranychidae) and Their Potential as a Mycopesticide
Table 1
Mortality of B. bassiana isolates against T. urticae with LT50 and LT90 values.
Dose
3rd day
5th day
7th day
LT50
Confidence limits (%95)
LT90
Confidence limits (%95)
65 ± 5% RH
AT007
1 × 106
24 ± 2.3
62.7 ± 6.4
90.7 ± 5.6
4.80
3.62–4.57
7.71
6.53–10.14
1 × 107
30.7 ± 4.3
68 ± 4.0
92 ± 6.3
3.73
3.25–4.24
7.82
6.49–10.61
1 × 108
37.3 ± 5.3
76 ± 8.2
96 ± 0.0
3.34
2.90–3.77
6.58
5.61–8.42
AT076
1 × 106
49.3 ± 4.3
76 ± 6.4
100 ± 0.0
2.86
2.42–3.29
6.36
5.32–8.36
1 × 107
53.3 ± 4.7
85.3 ± 5.0
100 ± 0.0
2.71
2.30–3.11
5.75
4.88–7.34
1 × 108
60 ± 7.3
88 ± 8.2
100 ± 0.0
2.50
2.11–2.87
5.20
4.44–6.54
Control
1.33 ± 1.3
1.33 ± 1.3
4 ± 2.3
100% RH
AT007
1 × 106
34.7 ± 3.3
73.3 ± 7.4
100 ± 0.0
3.33
2.90–3.74
6.45
5.53–8.17
1 × 107
36 ± 5.3
78.7 ± 6.0
100 ± 0.0
3.16
2.24–4.00
6.08
4.68–7.61
1 × 108
44 ± 4.3
89.3 ± 7.2
100 ± 0.0
2.89
2.50–3.24
5.19
4.54–6.30
AT076
1 × 106
48 ± 5.3
89.3 ± 8.4
100 ± 0.0
2.77
2.37–3.16
5.61
4.80–7.05
1 × 107
65.3 ± 5.7
93.3 ± 6.0
100 ± 0.0
2.26
1.90–2.60
4.53
3.89–5.61
1 × 108
68 ± 6.3
100 ± 0.0
100 ± 0.0
2.17
1.83–2.47
4.04
3.50–4.93
Control
1.33 ± 1.3
2.67 ± 1.3
5 ± 2.3
All values represent mean ± standard error of three determinations (). Same alphabet letters in the same column are not significantly different at .
