www.xsgrowth.com

  • Increase font size
  • Default font size
  • Decrease font size
XSGrowth Home Fungicides An Insight Into Quinone Outside Inhibitor (QoI) Fungicides

An Insight Into Quinone Outside Inhibitor (QoI) Fungicides

E-mail Print PDF
 
M. P. Srivastava, FNAS, Chairperson, International Working Group on Plant Health Clinic

Quinone outside inhibitor fungicides are synthetic derivatives of naturally occurring strobillurin compounds introduced in the late 1990s and represent a novel group of fungicides, highly active against a broad range of fungi belonging to Oomycetes, Ascomycetes, Basidiomycetes and Deuteromycetes. They are mitochondrial respiration inhibitors (MRI) which inhibit fungal respiration at the Quinone “Outside” (Qo) binding site of the cytochrome bc 1 complex. Being site-specific, they are at risk from the development of resistance in the target plant pathogens.

QoIs are not cross resistant with other fungicide groups, but there is a cross resistance among all active ingredients within QoI group which includes azoxystrobin, kresoxim-methyl, demoxystrobin, fluoxastrobin, metaminostrobin, orysastrobin, picostrobin, pyraclostrobin, trifloxystrobin, and the non-strobilurins, famoxadone (oxazoldinone compound/oxazole fungicide) and fenamidone (imadizilinone compound/imadizole fungicide). QoI group of fungicides were previously known as STAR (Strobilurin-Type Action and Resistance/ Strobilurins And Related compounds) fungicide.

In order to minimize the likelihood of resistance development, resistance guidelines provided by FRAC must be followed, which involves following key points:
•    In cereal crops the number of QoI containing sprays must not exceed two.
•    QoI products must always be used in combination with a product, other than QoI, recommended for the control of same disease.
•    QoI product should be used preventively or as early as possible in the disease cycles keeping aside reliance on curative ability.

It is therefore vitally important that all users of QoI fungicides adhere to the latest resistance management guidelines for cereal and other crops available from FRAC. For latest updates, consult the web page, http://www.frac.info/.
 
Some solo and coordinated products commercially developed for various QoI fungicides are given below:

 

Commercially available QoI fungicides

Company / Common Name                 
Solo Product
Coordinated Products

Syngenta

 

Azoxystrobin

Abound, Amistar, Heritage,                     

Quadris 

Uniform (azoxystrobin + mefanoxam)

Quilt (azoxystrobin + propiconazole)

Quadris Opti (azoxystrobin + chlorothalonil) 

Du Pont

 

Famaxadone 
Famoxate Tanos 50 DS (famaxadone + cymoxanil)

Bayer CropScience

 

Fenamidone

Reason, Fenstar

Fenomen, Sonata, Sereno 

 

Arysta LifeScience

             

Fluoxastrobin
Disarm, Evita  

Bayer

 

Fluoxastrobin 
Vigold 

BASF

 

Kresoxim-methyl
Sygnus, Sovran, Stroby  

Collis (kresoxim-methyl + boscalid) 

Allergo (kresoxym-methyl + epoxiconazole) 

Bayer CropScience

 

Metaminostrobin
Oribright1
 

BASF

 

Orysastrobin
Arashi2
 

Du Pont

 

Picoxystrobin
Acanto 

BASF

 

Pyraclostrobin

Cabrio, Headline, Insignia

Comet 

Pristine (pyraloclostrobin + boscalid)

Bayer CropScience

 

Trifloxystrobin
Compass, Flint, Gem, Twist   Stratego (Trifloxystrobin + propiconaz 

1 Excellent against Blast of rice

2 Recommended against Blast and Sheath blight of rice

Last Updated on Monday, 06 July 2009 06:49  

Newsflash

Dismayed at the growing concrete jungle in Gurgaon and mindful of horrors of global warming, Dr. Srivastava has since started a movement of sorts by planting saplings of Peepal and Neem in the Millenium City. His group is called APPAN (Awareness Promotion for Peepal and Neem).

Read More