Tree Fruit Research & Extension Center

Crop Protection Guide for Tree Fruits

Apricot at Petal fall

See General Recommendations for guidelines on table use. Read all product labels carefully.
Avoid killing bees on blooming cover crops. See Hazards to Bees.
Pest or disease to be controlled Use any one of the listed materials or combinations Amount per acre
(except where noted)
Re-entry interval Preharvest interval
or
timing restriction
Mode of action

Brown rot (blossom blight)

 1. iprodione
(Rovral 4F)
1-2 pt24 h NL 2
 2. myclobutanil
(Rally 40WSP)
5 oz24 h 0 d 3
 3. azoxystrobin
(Abound 2.08F)
12-15.5 fl oz4 h 0 d 11
 4. pyraclostrobin+boscalid
(Pristine)
10.5-14.5 oz12 h 0 d 7,11
 5. metconazole
(Quash 50WDG)
2.5-3.5 oz12h 14d 3
 
azoxystrobin -- Abound is extremely phytotoxic to certain apple varieties. See Application Directions, Resistance Management, and Attention information on label.
myclobutanil -- See label for specific use recommendations. Place into solution before adding oil.

Pest or disease to be controlled Use any one of the listed materials or combinations Amount per acre
(except where noted)
Re-entry interval Preharvest interval
or
timing restriction
Mode of action

Coryneum blight (shothole)

 1. chlorothalonil
(Bravo Ultrex 82.5WDG)
See label12 h 0 d M5
 2. azoxystrobin
(Abound 2.08F)
11-15 fl oz4 h 0 d 11
 3. pyraclostrobin+boscalid
(Pristine)
10.5-14.5 oz12 h 0 d 7,11

Pest or disease to be controlled Use any one of the listed materials or combinations Amount per acre
(except where noted)
Re-entry interval Preharvest interval
or
timing restriction
Mode of action

Powdery mildew (Perfection spot)

 1. myclobutanil
(Rally 40WSP)
5 oz24 h 0 d 3
 2. propiconazole
(Orbit 3.6L)
4 fl oz12 h 0 d 3
 3. azoxystrobin
(Abound 2.08F)
11-15 fl oz4 h 0 d 11
 4. metconazole
(Quash 50WDG)
2.5-3.5 oz12h 14d 3

Pest or disease to be controlled Use any one of the listed materials or combinations Amount per acre
(except where noted)
Re-entry interval Preharvest interval
or
timing restriction
Mode of action

Grape mealybug, aphids

 1. diazinon
(Diazinon 50W)
4 lb4 d 21 d 1B
 2. imidacloprid
(Provado 1.6F)
4-8 fl oz12 h 0 d 4A
 
imidacloprid -- Do not apply during prebloom, bloom, or when bees are actively foraging.

Pest or disease to be controlled Use any one of the listed materials or combinations Amount per acre
(except where noted)
Re-entry interval Preharvest interval
or
timing restriction
Mode of action

Leafrollers

 1. Bacillus thuringiensis subsp. kurstaki See label4 h 0 d 11B2
 2. chlorantraniliprole
(Altacor 35WDG)
4.5 oz4 h 10 d 28
 3. spinetoram
(Delegate 25WG)
7 oz4 h 14 d 5
 4. spinosad
(Success 2F)
4-8 fl oz4 h 14 d 5
 5. spinosad
(Entrust 80W)
2.5 oz4 h 14 d 5
 6. flubendiamide
(Belt 4SC)
3-4 fl oz12 h 7 d 28
 
RESISTANCE MANAGEMENT: To minimize the development of leafroller resistance to any unique class of insecticide products in the class should not be used against consecutive generations. A sound resistance management program therefore requires the use of different classes of insecticide against consecutive generations.
Bacillus thuringiensis subsp. kurstaki -- Bts must be ingested by pest, so complete coverage is necessary for efficacy. Apply when warm weather is predicted for 3 or more days. Two or three applications per pest generation may be required to achieve adequate control.
spinosad -- Some leafroller populations have developed resistance to Success (spinosad) and its use could results in reduced levels of control. Success is in the same chemical class as Delegate (spinetoram) so avoid using these products against two consecutive generations. Entrust is a spinosad formulation registered for organic apple production.
spinetoram -- Delegate is a newly registered insecticide effective against leafroller larvae. Delegate is in the same chemical class, that is has the same mode of action, as Success (spinosad).
chlorantraniliprole -- Altacor is highly effective against leafroller larvae. Altacor is in the same chemical class as Belt so avoid using these products against two consecutive generations.
flubendiamide -- Belt is in the same chemical class as Altacor so avoid using these products against two consecutive generations.

Pest or disease to be controlled Use any one of the listed materials or combinations Amount per acre
(except where noted)
Re-entry interval Preharvest interval
or
timing restriction
Mode of action

Lygus bug

 1. lambda-cyhalothrin
(Warrior 1CS)
2.5-5 fl oz24 h 14 d 3A

Pest or disease to be controlled Use any one of the listed materials or combinations Amount per acre
(except where noted)
Re-entry interval Preharvest interval
or
timing restriction
Mode of action

Oriental fruit moth

 1. acetamiprid
(Assail 30SG)
8 oz12 h 7 d 4A
 2. chlorantraniliprole
(Altacor 35WDG)
4.5 oz4 h 10 d 28
 3. phosmet
(Imidan 70W)
4 lb7 d 14 d 1B
 4. spinetoram
(Delegate 25WG)
6-7 oz4 h 14 d 5
 5. flubendiamide
(Belt 4SC)
3-4 fl oz12 h 7 d 28

Pest or disease to be controlled Use any one of the listed materials or combinations Amount per acre
(except where noted)
Re-entry interval Preharvest interval
or
timing restriction
Mode of action

Peach twig borer

 1. Bacillus thuringiensis subsp. kurstaki See label4 h 0 d 11B2
 2. phosmet
(Imidan 70W)
3-4.25 lb7 d 14 d 1B
 3. spinetoram
(Delegate 25WG)
4.5-7 oz4 h 14 d 5
 4. spinosad
(Entrust 80W)
2.5 oz4 h 14 d 5
 5. spinosad
(Success 2F)
4-8 fl oz4 h 14 d 5
 6. chlorantraniliprole
(Altacor 35WDG)
3-4.5 oz4 h 10 d 28
 7. flubendiamide
(Belt 4SC)
3-4 fl oz12 h 7 d 28
 
Consult the peach twig borer model, available over the IPM Decision Aids System web site at http://das.wsu.edu/, to optimize timing for insecticide treatments.
RESISTANCE MANAGEMENT: To minimize the development of peach twig borer resistance to any unique class of insecticide products in the class should not be used against consecutive generations. A sound resistance management program therefore requires the use of different classes of insecticide against consecutive generations.
chlorantraniliprole -- Altacor is effective against peach twig borer larvae. Altacor is in the same chemical class as Belt so avoid using these products against two consecutive generations.
flubendiamide -- Belt is in the same chemical class as Altacor so avoid using these products against two consecutive generations.

 

Tree Fruit Research & Extension Center, Washington State University, 1100 N Westen Ave, Wenatchee WA 8901, 509-663-8181, Contact Us