CITRUS: FUNGICIDE EFFICACY - CONVENTIONAL
|
|
Resistance risk (FRAC |
Phytophthora2 |
Septoria |
Anthrac |
Alter- naria |
Greasy |
Rind |
|
|
Fungicide*** |
Code)1,5 |
Brown Rot |
Root Rot |
Spot |
-nose |
Rot |
Spot |
Disorder |
|
Orondis |
high (49) |
5 |
5 |
0 |
0 |
0 |
0 |
0 |
|
Revus |
high (40) |
5 |
NL |
0 |
0 |
0 |
0 |
0 |
|
Presidio |
high (43) |
NL |
5 |
0 |
0 |
0 |
0 |
0 |
|
Ridomil, Metalaxyl |
high (4) |
NL |
3 |
0 |
0 |
0 |
0 |
0 |
|
Ridomil Gold, Mefenoxam |
high (4) |
NL |
3 |
0 |
0 |
0 |
0 |
0 |
|
Copper |
low (M1) |
4 |
0 |
4 |
3 |
1 |
3 |
0 |
|
Aliette, ProPhyt, Fungi-Phite, K-Phite |
low-medium (P07, 33) |
4 |
4 |
3 |
3 |
1 |
ND |
0 |
|
Luna Sensation |
medium (7/11)5 |
NL |
0 |
5 |
5 |
2 |
4 |
0 |
|
Priaxor |
medium (7/11)5 |
NL |
0 |
5 |
5 |
2 |
4 |
0 |
|
Mibelya* |
medium (3/7)5 |
NL |
0 |
5 |
5 |
2 |
4 |
0 |
|
Switch4 |
medium (9/12) |
0 |
0 |
5 |
5 |
2 |
4 |
0 |
|
Miravis Prime**4 |
medium (7/12) |
0 |
0 |
5 |
5 |
2 |
4 |
0 |
|
Pristine |
medium (7/11)5 |
NL |
0 |
4 |
4 |
2 |
4 |
0 |
|
Quadris Top |
medium (3/11) |
NL |
0 |
5 |
5 |
3 |
4 |
0 |
|
Abound |
high (11)5 |
NL |
0 |
4 |
4 |
2 |
4 |
0 |
|
Flint Extra |
high (11)5 |
NL |
0 |
4 |
4 |
2 |
4 |
0 |
|
Headline |
high (11)5 |
NL |
0 |
4 |
4 |
2 |
4 |
0 |
|
Ph-D, Oso |
high (19) |
NL |
NL |
4 |
4 |
1 |
0 |
0 |
|
Bumper,Tilt3 |
high (3) |
0 |
0 |
NL |
NL |
NL |
4 |
0 |
|
Enable |
high (3) |
0 |
0 |
NL |
NL |
1 |
4 |
0 |
|
Scala4 |
high (9) |
0 |
0 |
NL |
NL |
1 |
NL |
0 |
|
Ferbam** |
low (M3) |
NL |
NL |
0 |
3 |
0 |
0 |
0 |
|
Sulfur |
low (M2) |
0 |
0 |
0 |
0 |
0 |
3 |
0 |
|
Vapor Gard |
anti-transpirant |
0 |
0 |
0 |
0 |
0 |
0 |
5 |
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** Not registered, label withdrawn or inactive in California.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/Cerafruta/Uniguard, Imazalil/Deccocil/Fungaflor, Graduate/FDL, GraduateA+, Azoxy, Mentor, Penbotec/Pyrimethanil, and Alumni/Decco Salt No. 19/TBZ.
1 Code 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 Code number are suitable to alternate in a resistance management program. In California, make no more than one application of fungicides with mode-of-actions (MOA) with high resistance risk before rotating to a fungicide with a different MOA (Code number); for other fungicides, make no more than two consecutive applications before rotating to fungicide with a different MOA (Code number).
2 Do not use the same fungicide or fungicides with similar chemistry more than twice in one year.
3 Only for non-bearing citrus.
4 Only federally registered on lemons and/or limes (check label).
5 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.
CITRUS: TREATMENT TIMING
Note: Not all indicated timings may be necessary for disease control.
|
Disease |
Spring root flush |
Fall root flush |
Oct./Nov. |
Jan./Feb. |
March |
5 to 1 wk PHI |
||
|
Phytophthora brown rot |
0 |
0 |
3 |
3 |
2 |
1 |
||
|
Phytophthora root rot |
3 |
3 |
0 |
0 |
0 |
0 |
||
|
Septoria spot |
0 |
0 |
3 |
3 |
1 |
0 |
||
|
Anthracnose |
0 |
0 |
0 |
0 |
0 |
3 |
||
|
Alternaria rot |
0 |
0 |
0 |
0 |
0 |
1/2 |
||
|
Greasy spot |
0 |
0 |
0 |
0 |
0 |
3 |
||
|
Rind disorder4 |
0 |
0 |
3 |
2 |
1 |
0 |
||
Rating: 3 = most effective, 2 = moderately effective, 1 = least effective, and 0 = ineffective
2 Anthracnose and greasy spot management is generally high (+++) with preharvest applications before warm, wet weather.
3 Alternaria fruit rot management with fungicides is generally low (+) with preharvest fungicide applications before wet weather (the current understanding of the epidemiology of the disease is limited).
4 Management of rind disorder especially on early-season mandarins (e.g., Satsuma) is generally high (+++) provided that fruit are harvest within 6 to 8 weeks of color break. Other mid- and late-season cultivars have less problems unless high rainfall is observed. Treatment timing should be at color break. Repaeat applications may be necessary.