Metyltetraprole Explained

Metyltetraprole is a quinone outside inhibitor fungicide sold under the brand name Pavecto by its inventor, Sumitomo Chemical.^[1] It is the only tetrazolinone fungicide and the only one in the Fungicide Resistance Action Committee's subgroup 11A.

Development

Metyltetraprole was developed specifically to find an a.i. with the same mode of action (a QI) but with sufficiently different chemistry as to avoid "critical" QI resistance increasing around the world.^[2]

Target pathogens

Metyltetraprole is highly effective against Alternaria triticina.

Resistance

Developed because of increasing resistance to the main group of QIs. See §Development above.

Cross-resistance

It does not suffer cross-resistance with the resistance against 11 conferred by the cytochrome b mutation G143A. Cross-resistance against F129L is unassessed.^[3]

Binding Mode

The structure of the tetrazolinone pharmacophore is very similar to the triazolone pharmacophore of an inhibitor developed by AgoEva, for which the binding mode has been elucidated in the structure deposited as 3L73 in the protein databank.

Notes and References

1. Umetsu . Noriharu . Shirai . Yuichi . Development of novel pesticides in the 21st century . . . 45 . 2 . 2020-05-20 . 1348-589X . 10.1584/jpestics.d20-201 . 54–74 . 33132734 . 1349-0923. 7581488 . ISSN-L 0385-1559
2. Matsuzaki . Yuichi . Yoshimoto . Yuya . Arimori . Sadayuki . Kiguchi . So . Harada . Toshiyuki . Iwahashi . Fukumatsu . Discovery of metyltetraprole: Identification of tetrazolinone pharmacophore to overcome QoI resistance . . . 28 . 1 . 2020 . 0968-0896 . 10.1016/j.bmc.2019.115211 . 115211. 31753801 . free .
3. Web site: FRAC Code List ©*2021: Fungal control agents sorted by cross resistance pattern and mode of action (including coding for FRAC Groups on product labels) . March 2021 . FRAC (Fungicide Resistance Action Committee) . 1–17.