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.
Home Orchards: Table 4.4. Disease, Insect, and Mites on Apples and Pears - Articles
Home Orchards: Table 4.4. Disease, Insect, and Mites on Apples and Pears

M.G. Klein, USDA Agricultural Research Service, Bugwood.org

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

Table 4.4a Diseases

TimingSPMRBERCRSBSRFS
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

Table 4.4b. Insects and Mites

TimingAMBMSBCMEASERMGAGMOFMPCPPRAASJSTPBTSMWAL
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.