Bacterial Diseases of Tomato: 2012

Transcription

1 Bacterial Diseases of Tomato: 2012

2 Bacterial diseases of tomato Bacterial speck Bacterial spot Bacterial canker

3 Bacterial diseases of tomato Bacterial speck- causes lesions on leaves, stems and fruit. Prefers cool (64-75 F), wet weather Bacterial spot Bacterial canker

4 Bacterial speck of tomato

5 Bacterial speck of tomato

6 Bacterial diseases of tomato Bacterial speck Bacterial spot-causes lesions on leaves, stems and fruit. Favored by warm (75-86 F), wet weather. Bacterial canker Bacterial leaf spot of pumpkincaused by a different microbe

7 Bacterial spot of Tomato

8 Bacterial spot of tomato

9 Bacterial spot of Tomato

10 Bacterial spot of tomato

11 Bacterial spot of tomato Rain checking

12 bacterial spot

13 Usually, bacterial spot will not spread from tomato to pepper or from pepper to tomato. Bacterial spot of pepper?

14 Bacterial spot of Pepper

15 Bacterial diseases of tomato Bacterial speck Bacterial spot Bacterial canker Management similar

16 Bacterial spot of tomato Strains of the bacterial spot microbe resistance to fixed copper in Indiana Copper resistance in tomato & pepper strains Both copper resistant & sensitive strains in any year

17 Bacterial spot of tomato-host resistance Cultivars differ in susceptibility Avoid past problems Maynard, Egel and Zandstra Trials

18 Bacterial spot of pepper-host resistance Host resistance to Races 1-5 Grow cultivars with resistance to as many races as possible. In 2010, bact spot race 6 found in pepper (no host resistance)

19 Bacterial spot of tomato-greenhouse Purchase seed tested for disease Good sanitation Inspect seedlings Apply copper/mancozeb (not for peppers) Apply streptomycin e.g., Agri-mycin 17

20 Bacterial spot of Tomato-field Fall tillage Crop rotation Avoid leaf wetness Fixed copper/mancozeb-5-10 day schedule Actigard (0.33 oz/a) gal water/a increase water volume with Actigard rate 8 Actigard applications allowed per year.

21 Bacterial spot of Tomato- New products Tanos 50DF-may help with bact diseases when applied for fungal diseases. Serenade Max-may help with copper resistance Tank mix or alternate Agriphage-a disease of bact spot bacterium Need to send in samples early in season Marketed by OmniLytics

22 Bacterial diseases of tomato Bacterial speck Bacterial spot Bacterial canker-causes plant wilt, marginal leaf necrosis and fruit lesions.

23 bacterial canker

24 bacterial canker on transplant Photo-Mary Hausbeck

25 bacterial canker

26 bacterial canker

27 Bacterial canker of tomato

28 Bacterial canker of tomato Purchase seed tested for bacterial canker Sanitation-greenhouse & field Inspect seedlings Fall tillage/crop rotation Avoid leaf wetness Greenhouse copper/mancozeb Tanos 50DF

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30 Bacterial Diseases of Pumpkin: 2012

31 XANTHOMONAS BACTERIAL LEAF SPOT OSU: Jim Jasinski

32 ANGULAR LEAF SPOT OF CUCURBITS Cucumber most susceptible but all cucurbits may be affected Favored by moderate temperatures and high moisture OSU: Jim Jasinski

33 Bacterial spot pumpkin

34 Bacterial spot pumpkin

35 OSU PUMPKIN ALS/BACTERIAL SPOT TRAIL Two cultivars, susceptible Charmed (A & C) & tolerant Solid Gold (RU). Direct seeded 6 June in rolled winter rye. Four replications Inoculated with ALS strain. ALS symptoms confirmed on leaves, but only bacterial spot symptoms observed on fruit. Labeled products applied: Actigard, Kocide 3000, Serenade Max, Oxidate. (9 app s, 27 June-2 Sept) Non-labeled product applied: Kasumin 2L Products applied 7 day intervals. OSU: Jim Jasinski

36 RESISTANCE TO BACTERIAL SPOT- PUMPKIN Charme d Solid Gold Data: Jim Jasinski et al. OSU

37 EFFECT OF ANTIBACTERIAL PRODUCTS ON BACTERIAL SPOT OF PUMPKIN OSU: Jim Jasinski Incidence refers to % infection (Y or N) found in the plot (all fruit examined) Severity refers to % infection found on 10 fruit randomly sampled per plot 9 weekly applications from June 27 to September 2 Data provided by Jim Jasinski, OSU

38 BACTERIAL SPOT/ALS OF PUMPKIN MANAGEMENT Avoid problem cultivars Fall tillage/crop rotation Monitor seed source Greenhouse/field santiation Fixed copper applications/mancozeb Consider Actigard applications

39 BACTERIAL SPOT OF PUMPKINS Apply fixed copper products At onset of symptoms When fruit softball sized Every 7-14 days With Dithane or Manzate

40 NEW PRODUCT FOR PUMPKINS Actigard 50 WG Diseases labeled for include: Downy mildew Powdery mildew Bacterial spot

41 ACTIGARD 50 WG Induce plant defenses Actigard-avoid stressed plants (yield drag) Actigard is not in Purdue recommendations

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