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

Question 1

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

Answer 1

plant

Question 2

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

Answer 2

fungus

Question 3

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

Answer 3

Topical MOA

Question 4

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

Answer 4

Biochemical

Question 5

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

Answer 5

contact or penetrant

(outside or inside of the plant)

Question 6

What is phytomobility

Answer 6

how the a.i. moves within the plant

Question 7

what MOA does not penetrate the plant?

Answer 7

Contact Fungicides

Question 8

these fungicides affect fungi at specific metabolic sites

Answer 8

Penetrant Fungicides

Question 9

How does a Localized Penetrant work?

Answer 9

Absorbed into plant’s cuticle but doesnt move

Question 10

This Fungicide gets into the plant and moves upward:

Answer 10

Acropetal Penetrant

Question 11

How does a Acropetal Penetrant work?

Answer 11

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

Question 12

How does a Systemic Penetrant work?

Answer 12

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

Question 13

what is symplastic transport?

Answer 13

absorbing into the cells

Question 14

what is apoplastic transport?

Answer 14

absorbed and moves between cells

Question 15

according to Buckley, the only true systemic penetrant is:

Answer 15

Signature

Question 16

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

Answer 16

Multi-site toxins

Question 17

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

Answer 17

Site specific toxin

Question 18

This type of toxin has little chance of resistance.

Answer 18

Multi site toxin

Question 19

this type of toxin has a high likelyhood of resistance

Answer 19

Site-specific toxin

Question 20

what toxins are at a higher risk of resistance?

Answer 20

site specific toxins

Question 21

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

Answer 21

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

Question 22

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

Answer 22

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.

Question 23

What is Cross Resistance?

Answer 23

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

Question 24

What is multiple resistance?

Answer 24

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

Question 25

What are FRAC codes?

Answer 25

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

Question 26

Resistance Management:

What are some keys to doing this?

Answer 26

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

Question 27

When would you use a preventive rate of fungicides?

Answer 27

Apply before disesase

Lower rate

contact or penetrant

Question 28

when would you use a curative rate for fungicides?

Answer 28

After disease is present

Higher Rates

Question 29

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

Answer 29

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

Question 30

What nozzles on the sprayer are the most effective?

Answer 30

Flat Fan