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茼蒿細菌性葉斑病
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表二、茼蒿細菌性葉斑病菌對農藥感受性測定
Table 2.
Sensitivity of
Pseudomonas syringae
strains obtained from
Chrysanthemum coronarium
to
different agrochemicals
Chemicals
Concentration (ppm)
Inhibition zone (cm)
1)
Streptomycin
100
0.99 ± 0.01 c
Tetracycline (10% SP)
200
1.20 ± 0.01 b
400
1.30 ± 0.01 a
Kasugamycin (2% S)
100
0
200
0
400
0
Oxolinic acid (20% WP)
100
0.94 ± 0.04 b
200
1.06 ± 0.03 a
400
1.12 ± 0.03 a
Kasugamycin
500
0.27 ± 0.06 b
Copper oxychloride (81.3% WP)
750
0.41 ± 0.14 b
1,000
0.60 ± 0.14 a
Thiophanate methyl
500
1.40 ± 0.01 c
Streptomycin (66.8% WP)
750
1.50 ± 0.05 b
1,000
1.61 ± 0.02 a
Mancozeb (80% WP)
1,000
0
1,500
0
2,000
0
Copper hydroxide (53.8% WP)
1,000
0.69 ± 0.29 b
1,500
1.07 ± 0.06 a
2,000
1.20 ± 0.06 a
Streptomycin (12.5% SL)
100
1.20 ± 0.02 c
200
1.28 ± 0.02 b
400
1.40 ± 0.01 a
Tribasic copper
250
0
Sulfate (27.12% SC)
500
0
750
0
CK
0
1)
Mean
±
standard error. Means that are in the same column and are followed by the same letter are not significantly
different at the 5% level according to the LSD test.