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Weekly Insect Bytes for May 30

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Posted: June 2, 2014

Although brown marmorated stink bug (BMSB) adults still continue to emerge from their overwintering shelters, this past week we observed the first BMSB eggs deposited on fruit trees. First generation codling moth (CM) flight is underway in apple and pear orchards.
Photo by G. Krawczyk

Photo by G. Krawczyk

The insect pest control updates presented below are for South-central Pennsylvania based on observations in Adams County. To view the insect hatch and trapping data for all major insect pests, please visit the Penn State Fruit Research and Extension Center (FREC) website, and click on "Growing Season Updates" (on the left).

Current Pest Status

Codling moth flight underway

First generation codling moth (CM) flight is underway in apple and pear orchards. The egg hatch developmental model provided by SkyBit Inc. forecasts about 50 percent CM egg hatch to occur sometime around June 07. If mating disruption materials are not used to control CM, applications of Altacor®, Belt®, Delegate®, Tourismo® or Voliam Flexi® or Voliam Xpress® should provide excellent control. Codling moth granulosis virus (Cyd-X®, Cyd-X HP® or Madex XP®) applied after the beginning of egg hatch should also provide good control of CM neonate larvae. The moth captures in pheromone traps baited with CM DAC lure (orchards with CM mating disruption) or CM 1x lure (orchards without CM mating disruption) should serve as the main indicators of whether CM control is necessary. 

Tufted apple budmoth egg hatch

Unless a special tufted apple budmoth (TABM) treatment is warranted based on high numbers of captured moths in pheromone traps, the application of insecticides for the control of CM should help to control early larvae. According to the SkyBit model for the FREC orchards, the TABM egg hatch on June 07 should be around 5 percent.  Insecticides such as Altacor, Belt, Delegate, Tourismo or Voliam Flexi or Voliam Xpress used for CM management also provide very effective control of TABM. If CM control is not required, applications of Intrepid or BT based products should provide good control of only leafrollers.

Brown marmorated stink bug eggs observed on fruit trees

Although brown marmorated stink bug (BMSB) adults still continue to emerge from their overwintering shelters, this past week we observed the first BMSB eggs deposited on fruit trees. Fortunately no BMSB nymphs were detected as of May 30. The presence of BMSB nymphs in the orchards will mean a shift from “probable BMSB injuries” to actual nymphal feeding (and injuries) on fruit.  During the last few weeks BMSB traps baited with fresh commercially available lures from Rescue or Ag-Bio and placed on the edges of orchards or woods were effective in monitoring BMSB adults. The deployed BMSB traps also collected some native stink bugs.

Next Oriental fruit moth flight sometime after mid-June

The first generation Oriental fruit moth (OFM) flight is completed in most orchards and control of this pest is not effective at this time. The larvae are feeding either in growing shoots of trees or are inside developing stone fruit and apples. The next good timing to control OFM will begin during the second generation flight, sometime after mid-June. 

2014 biofix dates

In the Biglerville area (FREC orchards) the 2014 season biofix for spotted tentiform leafminer was established on April 17th, Oriental fruit moth on April 23; codling moth on May 09th, tufted apple bud moth on May 12th and obliquebanded leafroller on May 29th.

Contact Information

Grzegorz (Greg) Krawczyk
  • Extension Tree Fruit Entomologist
Email:
Phone: 717-677-6116