1 / 26

FUNGICIDES

FUNGICIDES. FUNGICIDES. Fungicides kill or inhibit fungi Inhibit growth and reproduction Fungistatic Not all fungicides are curative Some only preventative. CONTACT FUNGICIDES. Active on leaf surface Inhibit fungal growth Control for 7 to 14 days Rapidly degrade

emile
Download Presentation

FUNGICIDES

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. FUNGICIDES

  2. FUNGICIDES Fungicides kill or inhibit fungi • Inhibit growth and reproduction • Fungistatic • Not all fungicides are curative • Some only preventative

  3. CONTACT FUNGICIDES • Active on leaf surface • Inhibit fungal growth • Control for 7 to 14 days • Rapidly degrade • Light, MO, and exposure

  4. CONTACT FUNGICIDES • Was most common fungicides • Re-registration cost • Less expensive • Broad range of control • Less resistance • Multiple MOA • Leaf spot diseases

  5. PENETRANT FUNGICIDES • Enter plant tissue • Provide longer protection than contacts at lower rates • As long as 21 to 28 days

  6. PENETRANT FUNGICIDES Types of Penetrants • Localized, little or no movement in the plant • Translaminar moves across leaf blade • Mesostemic moves into cuticle and epidermis

  7. PENETRANT FUNGICIDES Types of Penetrants • Acropetal, upward translocation • Majority of penetrants are acropetal

  8. PENETRANT FUNGICIDES Types of Penetrants • Systemic, true systemic up and downward movement • Fosetyl-al (common name)

  9. FUNGICIDE RESISTANCE • Selection of tolerant fungi by using the same class of chemical • Same mode of action (MOA) • Fungal pathogens that produce more spores more susceptible to developing resistance • Botrytis, powdery mildew, downy mildew, rust • Rotate fungicide classes • http://www.frac.info codes

  10. FUNGICIDE RESISTANCE • Contact prevent fungal growth by interrupting >2 growth processes • Penetrants often interrupt only 1 process

  11. FUNGICIDE RESISTANCE Humans (Disease) • Alien (Contact fungicide) • 3 MOA • Spit acid • Tail spear • Mouth #2 • If humans thick acid-resistant skin, Alien just stabs them with tail or mouth #2 • Resistance averted

  12. FUNGICIDE RESISTANCE Humans (Disease) • Alien Jr. (Systemic fungicide) • 1 MOA • Suffocation • If humans develop ability to breathe out ears, Alien Jr. no longer works • Humans resistant

  13. FUNGICIDE RESISTANCE Avoiding resistance • Rotate chemical classes • Tank mix contacts and penetrants • Increases MOA and control spectrum

  14. Incomplete list ofFUNGICIDE CATEGORIES Benzimidazoles • Thiophanate-methyl very popular

  15. Incomplete list ofFUNGICIDE CATEGORIES Dicarboximides • Iprodione • Good on flower blight

  16. Incomplete list ofFUNGICIDE CATEGORIES Sterol Inhibitors • Myclobutanil • Fenarimol (documented disease resistance)

  17. Incomplete list ofFUNGICIDE CATEGORIES Strobilurins • Synthesized version of antifungal substance produced by fungus • Strobilurus tenacellus • Feeds on organic matter • Inhibits competitive MO • Very low toxicity • EPA calls reduced risk

  18. Incomplete list ofFUNGICIDE CLASSES Strobilurins • Single target site • Resistance risk • Azoxystrobin (Heritage) • Wide range of control • Long residual

  19. Incomplete list ofFUNGICIDE CLASSES Strobilurins • Trifloxystrogin (Compass) • Can travel 2” through air as vapor to other leaves

  20. Incomplete list ofFUNGICIDE CATEGORIES Oomycete Products • Oomycetes are not true fungi • Phytophthora • Phythium • Downy mildew • Root rot fungicides • Fosetyl-al (Aliette) • Only true systemic

  21. Incomplete list ofFUNGICIDE CATEGORIES Broad Spectrum Protectants • Contact fungicides • Rare resistant problems • Chlorothalonil very popular • Mancozeb

  22. Incomplete list ofFUNGICIDE CATEGORIES Biological • Antagonistic rather than fungicidal • Protective • Rootshield (Trichoderma fungus) • Root disease • Companion (Bacillus bacteria) • Root and foliar disease

  23. Incomplete list ofFUNGICIDE CATEGORIES Inorganic • Bordeaux mixture • Copper sulfate and lime • Copper controls bacterial disease

  24. Incomplete list ofFUNGICIDE CATEGORIES Natural • Neem oil • Foliar disease (contact) • Various other functions • Insecticide • Toothpaste • Etc.

  25. Incomplete list ofFUNGICIDE CATEGORIES Biological • Injection-based systems • Eco Soil Systems • Bacteria (Pseudomonas sp.) • BioTrek injection • Fungus (Trichoderma)

  26. COST COMPARISON

More Related