Fungicides - M.O.A. etc. (no product names) Flashcards Preview

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Flashcards in Fungicides - M.O.A. etc. (no product names) Deck (30)
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1

Topical mode of action is based on the toxins relationship with the _______.

plant

2

Biochemical mode of action is based on the toxins relationship with the _______. 

fungus

3

What mode of action is based on the toxins relationship with the plant?

Topical MOA

4

What mode of action it based on the toxins relationship with the Fungus? 

Biochemical

5

a Topical Mode of Action is classified as either a ______ or ______. 

contact or penetrant

(outside or inside of the plant)

6

What is phytomobility

how the a.i. moves within the plant

7

what MOA does not penetrate the plant?

Contact Fungicides

8

these fungicides affect fungi at specific metabolic sites

Penetrant Fungicides

9

How does a Localized Penetrant work?

Absorbed into plant's cuticle but doesnt move

10

This Fungicide gets into the plant and moves upward:

Acropetal Penetrant

11

How does a Acropetal Penetrant work?

It is absorbed into the plant and moves between the cells and into the xylem to move acropetally from the point of contact.  

12

How does a Systemic Penetrant work?

It is absorbed into the cells and follows the transport of sugars into the phloem.  it is translocated basipetally AND acropetally. 

13

what is symplastic transport?

absorbing into the cells

14

what is apoplastic transport?

absorbed and moves between cells 

15

according to Buckley, the only true systemic penetrant is:

Signature

16

This type of toxin usually kills fungus and might kill the plant:

Multi-site toxins

17

This type of toxin stops fungal growth, doesnt kill it or the plant. 

Site specific toxin

18

This type of toxin has little chance of resistance.

Multi site toxin

19

this type of toxin has a high likelyhood of resistance

Site-specific toxin

20

what toxins are at a higher risk of resistance? 

site specific toxins 

21

if a fungus has Monogenic resistance...what does that mean?

is develops resistance quickly becuase it evolves and changes a single gene which allows it to resist the toxin.  

22

If a fungus has Polygenic resistance...what does that mean?

It is harder for the fungus to build up resistance to a toxin becuase it has to evolve to change several genes to resist the toxin.  

23

What is Cross Resistance? 

when a fungus is resistant to all materials in the same chemical class

24

What is multiple resistance?

when a fungus is resistant to materials in several chemical classes. 

25

What are FRAC codes?

they provide fungicide resistance management guidelines to prolong the effectiveness of the products youre using.  

26

Resistance Management:

What are some keys to doing this? 

  • Roatate Materials with different target sites
  • Use label specified rates and dilution
  • Get good coverage
  • Treat Preventively
  • Dont rely on fungicides alone for control

27

When would you use a preventive rate of fungicides?

Apply before disesase

Lower rate

contact or penetrant

28

when would you use a curative rate for fungicides?

After disease is present

Higher Rates

 

29

what issues can arise from having uncompatible products in your tank?

  • Physical
    • foaming or sedimentation
  • Chemical
    • loss of toxicity
    • alkaline hydrolysis
  • Phytotoxicity
    • some mixes can be toxic to the plant

30

What nozzles on the sprayer are the most effective? 

Flat Fan