float bed disease n.
Download
Skip this Video
Download Presentation
Float Bed Disease

Loading in 2 Seconds...

play fullscreen
1 / 20

Float Bed Disease - PowerPoint PPT Presentation


  • 102 Views
  • Uploaded on

Float Bed Disease. Diseases - Bacterial Black leg - Erwinia sp. Same as hollow stalk & barn rot (houseburn) Black area at base of stalk (often splits stalk) Ubiquitous influenced by N fertility Control by monitoring fertility (not over 150 ppm N) Streptomycin Limited benefit.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Float Bed Disease' - lareina-mccarty


Download Now An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
diseases bacterial black leg erwinia sp
Diseases - Bacterial Black leg - Erwinia sp.
  • Same as hollow stalk & barn rot (houseburn)
  • Black area at base of stalk (often splits stalk)
  • Ubiquitous
  • influenced by N fertility
  • Control
    • by monitoring fertility (not over 150 ppm N)
    • Streptomycin
      • Limited benefit
diseases bacterial angular leaf spot pseudomonas syringae
Diseases - Bacterial Angular Leaf Spot - Pseudomonas syringae
  • Limited by leaf veins making spots angular in shape
  • More prevalent in outside beds exposed to rainfall
  • May be zonal on windward side of leaf
  • Control
    • Stretomycin
diseases fungal
Diseases - Fungal
  • Damping-off - Pythium sp.
    • Brown to black rot at base of plant and roots
    • Roots are often straw colored and hang limp down the tray when tray is held vertical
    • Water/soil borne fungi
    • Clean water source
terramaster 4ec controls growth of algae
Terramaster 4EC controls growth of algae

Source: W. Gutierrez & T. Melton, North Carolina State University, 2000

diseases fungal1
Diseases - Fungal
  • Target Spot - Rhizoctonia leaf spot - Rhizoctonia solani
    • Small water-soaked spot initially
    • Concentric circles or target
    • Favored by
      • low fertility
        • Rainfall dilution of outside bed
        • Reduction of N to slow plants
      • Maturity
target spot control
Target Spot - Control
  • - Dithane
    • 1 tsp/gal using 3 to 12 gals per 1000 sq ft or 400 trays depending on size of plants.Start when plants are at least the size of a dime
  • Carbamate
    • 1.5 to 3 tsp/gal using 3 to 12 gals per 1000 sq ft or 400 trays depending on size of plants.
      • Leaves black residue/easy to see
sore shin rhizoctonia solani
Sore shin Rhizoctoniasolani
  • Reddish-brown sunken lesions on stem of plants
  • Can come from target spot infections
  • See above
collar rot sclerotinia sclerotiorum
Collar rot Sclerotinia sclerotiorum
  • Small black-brown (straw colored) lesion at base of plant that may increase in size to encircle plant, killing plant
  • May spread into leaves
  • Noticed as softball sized dead area
  • White mycelium
  • Sclerotia
anthracnose colletotrichum gloeosporoides
Anthracnose Colletotrichum gloeosporoides
  • Small, light green, water-soaked pinpoint spots that enlarge to oily circular spots up to 3 mm in size
  • develop into thin, papery, gray-white
  • Known to spread from grasses
  • Control
    • Sanitation
    • Same for Target Spot
tray sterilization
Tray sterilization
  • Contaminated trays
    • New trays versus old
  • Bleach 10%
  • Steam
    • much reach 140o F for

30 min

    • 180o F damages Trays
  • Methyl Bromide
    • Cheap
    • Quick
    • Dangerous
      • Temperature

dependent

    • Environmental concerns
ad