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蔬 菜 病 害. 茎蔓病斑. 豇豆煤霉病. 症状. 叶两面初生赤褐色小点,后扩大成直径为 1 — 2cm 、近圆形或多角形的褐色病斑,病、健交界不明显。潮湿时,病斑上密生失黑色霉层,尤以叶片背面显著。严重时,病斑相互连片,引起早期落叶,仅留顶病嫩叶。病叶变小,病株结荚减少。. 豇豆煤霉病症状. 落叶病斑长白毛. 中期症状. 黑色霉层. 豇豆煤霉病. 症状. 分生孢子器放大. 分生孢子器切片. 豇豆煤霉病. 病原. - PowerPoint PPT Presentation
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12cm
Cercospora cruenta Saccardo141552um2.5-6.2um73530
2 253085% 12 370%80077%500
Cladosporium cucumerinum Ell et Arthur2.5352022 1520
1220min,342510100300400g800g 650%70%
[Fuluia fulua(Coole)Cif]11021438um59um 934202590%
125230min2%1500.4%50%435 6 50%50075%
Meion wilt10%30%80%90%
Fusarium oxysporum Schlecht.[Fusarium bulbigenum Cooke et Mass. var. Niveum (Smith)Wollenw] 5.012.52.54.015315.047.53.54.0513
562
5-6 0.14-3.3%
1 23 450%50010%30095%10kg120kg1318cm12 5
56
Verticillium dahliae Kleb26162413.533.32.163.36 2202528
1 2345
bacterial soft rot50%
Erwinia caratovora subsp carotovora 27-30 50 PH75.3-9.3 15
123 4 5 6
1 23 4200mg/kg50%600800
30cm12cm 1
2
45 3
Ralstonia soanacearum = Pseudomnas solanacea-rum0.920.50.81.10.613303741105210minpH6.08.0pH6.6
1 2
1 2 3 4 5 2%20%100500mg/kg710134
1
23 23mm
1Turnip mosaic uirusTuMV 2Cucumber mosaic uirus, CMV557010-310-424 3Tobacco mosaic uirus, TMV909710-61030
17 2 3 4 5
1
2 3
1TMV 2Tomato mosaic, ToMV 3Cucumber mosaic uirusCMV
1234h10%Na3PO42030min34 5