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Published by Utah State University Extension and Utah Plant Pest Diagnostic Laboratory September 2013IPM-004-13Pear Pest Monitoring CalendarStages of DevelopmentPests(Listed in order of management activity)Dormant Swollen BudGreen ClusterWhite BudFirst BloomFull BloomPetal FallPost Bloom/SummerPost- HarvestJune July August Sept.Crown Gall (minor pest)prevent at time of plantinginfection through injuries to roots, especially at time of transplantingZinc Deficiency(minor problem)                                                                                                                                                                                                  foliar testingdormant sprays most effective                                                                                foliar sprays only marginally effective      Iron Chlorosis                                                                                                                                                                                                  foliar testingearly spring soil treatments most effective                                                      repeat foliar applications on new growthPear Psylla                                                       monitor                                                                                             monitor                                    monitor adults on limbs; egg-laying begins in March                nymphs/summer adults/eggs on leaves and fruit                 winter adultsPear Decline(minor pest)use decline-resistant rootstocks                                                                                                                                                          remove diseased trees phytoplasma carried and spread by pear psylla                             good psylla control reduces decline symptomsFire Blight prune out dormant cankers                                                                                       watch for browning foliage & prune out in dry weather             overwinters in cankers                         multiple sprays during bloom may be necessary when weather is favorableRust Mite andBlister Mite (minor)                                                                                                                                                                   monitor                        monitor      adults under buds                            eggs/immatures/adults in buds, on leaves, and fruit                            adultsEuropean Red Mite (minor pest)                                                                           monitor                                                                         monitor                           eggs on limbs                                               immatures/adults/eggs on leaves                                           eggs on limbsSan Jose Scale(minor pest)                                                                                                                                                                   monitor                              immatures on limbs                                   adults/crawlers/immaturs on limbs, leaves, and fruit   immatures on limbsCodling Moth                                                                                                            monitor with traps bloom through Sept. 15                  larvae under bark                                  pupae under bark                          adults/eggs/larvae in fruit             immatures on limbsCherry (Pear) Slug (minor pest)                                                                                                                                                                 monitor                monitor                                   pupae in soil                                                  adults/eggs/larvae on leaves                  pupae in soil Spider Mitesmiticides not recommended unless treatment thresholds exceeded   adults at base of tree           eggs/immatures/adults on ground cover and tree leaves                        adultsUtah State University is committed to providing an environment free from harassment and other forms of illegal discrimination based on race, color, religion, sex, national origin, age (40 and older), disability, and veteran’s status. USU’s policy also prohibits discrimination on the basis of sexual orientation in employment and academic related practices and decisions.  USU employees and students cannot, because of race, color, religion, sex, national origin, age, disability, or veteran’s status, refuse to hire; discharge; promote; demote; terminate; discriminate in compensation; or discriminate regarding terms, privileges, or conditions of employment, against any person otherwise qualified. Employees and students also cannot discriminate in the classroom, residence halls, or in on/off campus, USU-sponsored events and activities.  This publication is issued in furtherance of Cooperative Extension work, acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture, Kenneth L. White, Vice President for Extension and Agriculture, USU.UPPDL, 5305 Old Main Hill, Logan UT 84322, utahpests.usu.eduArrows (               ) indicate intervals during which recommended management activities occur, if pest is present.Note: The indicated monitoring times should serve as guidelines for when to monitor and manage pests, if the pest has been a problem in the past.  Monitoring helps to identify whether the targeted pest is present in the orchard at damaging levels before a pesticide is used.

Pest Monitoring Calendar – Pear

https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1934&amp;context=extension_curall

Pest Monitoring Calendar – Pear

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