Agriculture: Apricot Pest Management Guidelines

Fungicide Efficacy for Apricot Diseases

Note: Do not use sulfur at any time on apricot trees or use captan preharvest on apricot fruit.

Fungicide*** Resistance risk (FRAC#)1 Brown rot2 Jacket rot Powdery mildew2 Shot hole Eutypa
Blossom Fruit
Adament** medium (3/11) 5 5 3 4 4 0
Abound high (11)4 3 2 0 ND 4 0
Botran medium (14) 3 3 4 ND ND 0
Bravo, Chlorothalonil, Echo, Equus9,10 low (M5) 3 3 3 0 4 0
Bumper, Tilt, Propiconazole high (3) 5 5 0 4 1 4
Captan10,11 low (M4) 3 011 3 0 4 0
Cevya high (3) 5 5 3 5 4 ND
Copper low (M1) 1 0 0 0 3 0
Elevate high (17)4 4 3 4 3 2 0
Flint Extra high (11)4 3 2 0 ND 4 0
Fontelis high (7) 5 4 5 5 5 0
Indar high (3) 5 5 0 ND 0 0
Inspire Super high (3) 5 5 5 4 4 0
Kenja high (7) 5 4 NL NL NL NL
Luna Experience medium (3/7) 5 5 3 4 4 0
Luna Sensation medium (7/11)4 5 5 4 4 5 0
Merivon medium (7/11)4 5 5 4 4 5 0
Miravis Duo medium (3/7) 5 5 3 4 4 0
Ph-D, Oso high (19) 3 3 4 4 2 0
Pristine medium (7/11)4 5 5 4 4 5 0
Protocol3 med.-high (1/3) 5 5 4 4 4 ND
Quadris Top medium (3/11) 5 5 2 4 4 0
Quilt Xcel, Avaris 2XS medium (3/11) 5 5 3 4 4 0
Quash high (3) 5 5 3 4 3 0
Quintec high (13) 0 0 0 5 0 0
Rally high (3) 4 4 0 4 0 4
Rhyme high (3) 5 5 3 4 3 0
Rovral5 + oil6 low (2) 5 NL 5 0 4 0
Rovral, Iprodione, Nevado5 low (2) 4 NL 4 0 4 0
Scala7 high (9)3,4 5 47 48 ND 3 0
Tebucon, Teb, Tebuconazole high (3) 5 5 2 2 2 0
TopsinM, T-Methyl, Incognito, Cercobin3 high (1)4 5 5 5 4 0 5
Vangard7 high (9)3,4 5 47 48 ND 3 0
Viathon medium (3/33, P07) 5 5 2 2 2 0
Vivando high (50) 0 0 0 4 0 0
Ziram low (M3) 1 0 2 0 5 0
Rating: 5 = excellent and consistent,     4 = good and reliable,     3 = moderate and variable,     2 = limited and/or erratic,     1 = minimal and often ineffective,     0 = ineffective,     NL = not on label, and     ND = no data.
*  Registration pending in California.
** Not registered, label withdrawn or inactive in California.
*** Postharvest fruit registrations in California include: BioSpectra/Uniguard, Chairman, Mentor, Penbotec/Pyrimethanil, and Scholar/FDL.
1 Group numbers are assigned by the Fungicide Resistance Action Committee (FRAC) according to different modes of action. Fungicides with different group numbers are suitable to alternate in a resistance management program. In California, make no more than one application of a fungicide with a mode-of-action group number associated with high resistance risk before rotating to a fungicide with a different mode-of-action group number; for other fungicides, make no more than two consecutive applications before rotating to fungicide with a different mode-of-action group number.
2 Do not use fungicides with the same FRAC number and high resistance risk more than twice in one year.
3 Strains of Monilinia fructicola and M. laxa resistant to TopsinM and T-Methyl have been reported in some California apricot orchards. Resistant strains of the jacket rot fungus, Botrytis cinerea, have been reported in California on crops other than almond and stone fruits and may have the potential to develop in apricots with overuse of fungicides with similar chemistry. Sub-populations of both Monilinia spp. have been shown to be resistant to anilinopyrimidineAP (FRAC 9) fungicides on prune in CA.
4 To reduce the risk of resistance development, start treatments with a fungicide with a multi-site mode of action; rotate or mix fungicides with different mode of action FRAC numbers for subsequent applications, use labeled rates (preferably the upper range), and limit the total number of applications per season.
5 Blossom blight only; not registered for use after petal fall.
6 The oil is a "light" summer oil, 1 to 2% volume/volume.
7 High summer temperatures and relative humidity reduce efficacy.
8 Has not been tested on apricot but is effective against the jacket rot pathogens.
9 Do not use after jacket (shuck) split.
10  Do not use in combination with or shortly before or after oil treatment.
11  Causes fruit browning or staining as a preharvest spray.

Acknowledgment: Adaskaveg et al., 2022. Fungicides, Bactericides, Biocontrols, Biocontrols, and Natural Products for Deciduous Tree Fruit and Nut, Citrus, Strawberry, and Vine Crops in California. (PDF)

Text Updated: 03/22