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Home Orchards: Table 4.4. Disease, Insect, and Mites on Apples and Pears
Occurrence of diseases, insects, and mites on apples and pears during the growing season.
Updated:
June 21, 2023
Diseases
- S = scab
- PM = powdery mildew
- R = rusts
- BER = blossom end rot
- CR = core rot
- SB = sooty blotch
- SR = summer fruit rots (black rot, white rot, bitter rot)
- FS = flyspeck
| Timing | S | PM | R | BER | CR | SB | SR | FS |
|---|---|---|---|---|---|---|---|---|
| Dormant | ||||||||
| 1/2 -inch green | ++ | -- | -- | -- | -- | -- | -- | -- |
| Prepink | ++ | ++ | -- | -- | -- | -- | -- | -- |
| Pink | ++ | ++ | + | -- | -- | -- | -- | -- |
| Bloom period | ++ | ++ | ++ | ++ | ++ | -- | -- | -- |
| Petal fall | ++ | ++ | ++ | ++ | ++ | -- | -- | -- |
| Mid-June | ++ | ++ | ++ | ++ | ++ | -- | -- | -- |
| Late June | ++ | ++ | -- | -- | -- | ++ | ++ | ++ |
| Early July | ++ | ++ | -- | -- | -- | ++ | ++ | ++ |
| Mid-July | ++ | ++ | -- | -- | -- | ++ | ++ | ++ |
| Late-July | ++ | ++ | -- | -- | -- | ++ | ++ | ++ |
| Early-mid-Aug. | ++ | -- | -- | -- | -- | ++ | ++ | ++ |
| Late Aug-mid-Sept. | ++ | -- | -- | -- | -- | ++ | ++ | ++ |
Insects and mites
- AM = apple maggot
- BMSB = brown marmorated stink bug
- CM = codling moth
- EAS = European apple sawfly
- ERM = European red mite
- GA = green aphids
- GM = gypsy moth
- OFM = Oriental fruit moth
- PC = plum cuculio
- PP = pear psylla
- RAA = rosy apple aphid
- SJS = San Jose scale
- TPB = tarnished plant bug
- TSM = two-spotted spider mite
- WAL = white apple leafhopper
| Timing | AM | BMSB | CM | EAS | ERM | GA | GM | OFM | PC | PP | RAA | SJS | TPB | TSM | WAL |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dormant | -- | -- | -- | + | -- | -- | ++ | ++ | ++ | -- | -- | -- | |||
| 1/2 -inch green | -- | -- | + | + | -- | -- | ++ | ++ | ++ | + | -- | -- | |||
| Prepink | -- | -- | + | + | + | -- | ++ | ++ | -- | ++ | -- | -- | |||
| Pink | -- | -- | ++ | + | + | ++ | -- | ++ | ++ | -- | ++ | -- | -- | ||
| Bloom period | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | ||
| Petal fall | -- | -- | ++ | ++ | + | ++ | ++ | + | + | + | ++ | ++ | -- | + | |
| Mid-June | -- | ++ | + | ++ | ++ | + | ++ | + | + | ++ | + | -- | ++ | ||
| Late June | + | ++ | + | ++ | ++ | ++ | ++ | + | ++ | + | + | ++ | |||
| Early July | ++ | + | + | ++ | + | -- | ++ | -- | + | + | + | -- | |||
| Mid-July | ++ | + | + | ++ | -- | ++ | -- | ++ | -- | + | + | ++ | -- | ||
| Late-July | ++ | ++ | ++ | ++ | -- | ++ | -- | ++ | -- | + | + | ++ | + | ||
| Early-mid-Aug. | ++ | ++ | ++ | + | + | ++ | -- | + | -- | ++ | + | + | ++ | ||
| Late Aug-mid-Sept. | ++ | -- | ++ | -- | + | ++ | -- | + | -- | ++ | + | -- | + |
+= pest present, possible control
++ = proper timing of control
-- = control generally is not needed at this time
Apply pesticides only if pests are present in damaging numbers. Bloom period is assumed to occur during the second week in May; this data should be adjusted depending on local conditions. Dates listed for sprays are approximate; they should be applied about once every two weeks.
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