How to Manage Pests
UC Pest Management Guidelines
Nectarine
General Properties of Fungicides Used in Nectarines
(Reviewed 6/10,
updated 6/10)
In this Guideline:
|
|
|
Common name
(trade name) |
Chemical class |
Activity |
Mode of action (Group #)1 |
Resistance potential |
Comments |
| azoxystrobin (Abound) |
Qol2 |
contact, systemic |
single-site (11) |
high |
|
| bordeaux |
inorganic |
contact |
multi-site (M1) |
low |
|
| captan |
phthalamide |
contact |
multi-site (M4) |
low |
highly toxic to honey bee larvae |
| chlorothalonil (Bravo, Echo) |
aromatic nitrile |
contact |
multi-site (M5) |
low |
|
| copper |
inorganic |
contact |
multi-site (M1) |
low |
|
| cyprodinil (Vangard) |
anilinopyrimidine |
mostly contact |
single-site (9) |
high |
|
| dichloran (Botran) |
aromatic hydrocarbon |
systemic (local) |
single-site (14) |
high |
|
| fenbuconazole (Indar) |
DMI3-triazole |
systemic (local) |
single-site (3) |
high |
|
| fenhexamid (Elevate) |
hydroxyanilide |
contact |
single-site (17) |
high |
|
| fosetyl-al (Aliette) |
phosphorothiolate |
systemic |
multi-site (33) |
low |
|
| iprodione (Rovral) |
dicarboximide |
systemic (local) |
multi-site (2) |
low |
toxic to honey bee larvae |
| mefenoxam (Ridomil Gold) |
acylalanine |
systemic |
single-site (4) |
high |
|
| metconazole (Quash) |
DMI3-triazole |
systemic (local) |
single-site (3) |
high |
|
| myclobutanil (Rally) |
DMI3-triazole |
systemic (local) |
single-site (3) |
high |
|
| propiconazole (Orbit) |
DMI3-triazole |
systemic (local) |
single-site (3) |
high |
|
| pyraclostrobin/boscalid (Pristine) |
Qol2/carboxyanilide |
systemic |
single-site/multi-site (11/7) |
medium/low |
|
| pyrimethanil (Scala) |
anilinopyrimidine |
mostly contact |
single-site (9) |
high |
|
| quinoxyfen (Quintec) |
quinoline |
contact |
single-site (13) |
medium |
|
| sulfur |
inorganic |
contact |
multi-site (M2) |
low |
highly
toxic to native strains of western predatory mite (Galendromus occidentalis) and to parasites
|
| tebuconazole (Elite) |
DMI3-triazole |
systemic (local) |
single-site (3) |
high |
|
| tebuconazole/trifloxystrobin (Adament) |
DMI3-triazole/Qol2 |
systemic |
single-site (3/11) |
medium |
|
| thiophanate-methyl (Topsin) |
benzimidazole |
systemic (local) |
single-site (1) |
very high |
|
| trifloxystrobin (Gem) |
Qol2 |
systemic5 |
single-site (11) |
high6 |
|
| ziram |
carbamate (DMDC4) |
contact |
multi-site (M3) |
low |
|
| 1
|
Group
numbers are assigned by the Fungicide Resistance Action Committee (FRAC)
according to different modes of actions (for more information, see
http://www.frac.info/). Fungicides with a different group number are suitable
to alternate in a resistance management program. In California, make no more
than one application of fungicides with mode of action Group numbers 1, 4, 9,
11, or 17 before rotating to a fungicide with a different mode of action
Group number; for fungicides with other Group numbers, make no more than two
consecutive applications before rotating to fungicide with a different mode of action Group number. |
| 2
|
Qol = quinone outside inhibitor (strobilurin) |
| 3
|
DMI = demethylation (sterol) inhibitor |
| 4
|
DMDC = dimethyl dithiocarbamate |
| 5
|
Fungicide
is generally considered to have systemic action based on performance data,
but this characteristic has not been necessarily proven experimentally using more rigorous assays (e.g. radioactively labeled compounds). |
| 6
|
Resistance
has been found in California for certain fungicides with a single-site mode
of action. To reduce the risk of resistance development, take the mode of
action into account when choosing a fungicide. At the beginning of a
treatment program, use a fungicide with a multi-site mode of action; for
subsequent applications rotate or mix fungicides with different mode of
action FRAC numbers. Use labeled rates (preferably the upper range) of the single-site fungicides, and limit the total number of applications/season. |
| |
![[Precautions]](/IMAGES/btn-precautions_bul.gif)
![[UC Peer Reviewed]](/IMAGES/logo-ucpeerreviewed.jpg)
UC IPM Pest Management Guidelines: Nectarine
UC ANR Publication 3451
General Information
Acknowledgment: Adaskaveg et al. Efficacy and Timing of Fungicides, Bactericides, and Biologicals for Deciduous Tree Fruit, Nut, Strawberry, and Vine Crops. For the most current information see the 2012 edition .
Top of page
|
