QoI

File:Famoxadone.svg

Famoxadone

Template:For Q_o inhibitors (Q_oI),<ref name="EMBL-EBI" /> or quinone outside inhibitors, are a group of fungicides used in agriculture. Some of these fungicides are among the most popular in the world.<ref name="Hawkins-Fraaije-2018">Template:Cite journal</ref> Q_oI are chemical compounds which act at the quinol outer binding site of the cytochrome bc₁ complex.

Most Q_oI common names end in -strobin and so are often called strobs.<ref name="FRAC-MoAs">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> Q_oI's are the resulting fusion of three fungicides families, the well-known family of strobilurins and two new families, represented by fenamidone and famoxadone. Some strobilurins are azoxystrobin, kresoxim-methyl, picoxystrobin, pyraclostrobin, and trifloxystrobin.

Usage

QoI fungicides are used on a wide range of crops, such as cereals, vines, pome fruits, cucurbits, tomatoes, and potatoes.Template:Cn

For example, they are used as fungicides for cereals, against Erysiphe graminis f.sp tritici responsible for the powdery mildew in wheat or against Septoria tritici, responsible for septoria leaf spot in wheat.Template:Cn

They are also commonly used for vine culture, against Plasmopara viticola, responsible for downy mildew or in oïdium treatment.Template:Cn

List

• Q_oIs:<ref name="FRAC-MoAs" />

• methoxy-acrylates:

• azoxystrobin
• coumoxystrobin
• enoxastrobin
• flufenoxystrobin
• picoxystrobin
• pyraoxystrobin

• methoxy-acetamides:

• mandestrobin

• methoxy-carbamates:

• pyraclostrobin
• pyrametostrobin
• triclopyricarb

• oximino-acetates:

• kresoxim-methyl
• trifloxystrobin

• oximino-acetamides:

• dimoxystrobin
• fenaminstrobin
• metominostrobin
• orysastrobin

• oxazolidine-diones:

• famoxadone

• dihydro-dioxazines:

• fluoxastrobin

• imidazolinones:

• fenamidone

• benzyl-carbamates:

• pyribencarb

• Q_oI subgroup A:

• tetrazolinones:

• metyltetraprole

Resistance

Main group resistance

Almost all these fungicides are in the same cross-resistance group (FRAC 11)<ref name="FRAC-MoAs" /> and must be managed carefully to avoid the appearance of fungicide resistance. All group 11s are cross-resistant with each other.<ref name="FRAC-MoAs" /> Some fungicide resistance has been observed in many crop pathogens<ref>Template:Cite journal</ref> (such as in the case of wheat powdery mildew), Template:Clarify <ref name="resis-manag-recomm">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> Resistance to group 11 is conferred by cytochrome b mutations G143A and F129L, and by other mechanisms.<ref name="FRAC-MoAs" />

Tetrazolinone resistance

The tetrazolinones consist of only one molecule, metyltetraprole. This constitutes FRAC 11A. 11A is not cross-resistant with 11 resistance conferred by G143A.<ref name="FRAC-MoAs" />

See also

• plant pathology
• integrated farming

External links

• Fungicides Resistance Action Committee, QoI Includes information on QoI working group activities.
• Gray Leaf Spot Resistance to Strobulurins