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Weekly Insect Bytes - Brown Marmorated Stink Bug Egg Masses and Young Numphs Observed in Orchards

Posted: June 22, 2011

Last week we observed the first brown marmorated stink bug egg masses and young nymphs in orchards, although the majority of the adults are still in surrounding areas of the orchards, feeding and reproducing on ornamental plants and woods. It appears that while the feeding on stone fruit was mostly concentrated on fruit, on apples the feeding happened mostly on foliage and growing shoots.

Current Pest Status

Based on monitoring observations on June 17th

Dr. Greg Krawczyk and Dr. Larry A. Hull, Penn State Department of Entomology, Fruit Research and Extension Center

The insect pest control updates presented below are for South-Central Pennsylvania based on observations in Adams County, Pennsylvania. Please modify the recommendations based on monitoring data from your own orchard blocks and weather conditions.

The 2011 season biofix for Oriental fruit moth was established on April 19, codling moth on May 7, tufted apple bud moth on May 11, spotted tentiform leafminer on April 06 and red banded leafroller on April 5; for obliquebanded leafroller the biofix was established on May 29.

  • The move of brown marmorated stinkbug (BMSB) adults from overwintering shelters is completed by now. During the last two weeks we observed the first injuries on stone fruit caused by adult BMSB feeding. Last week we also observed the first BMSB egg masses and young nymphs in the orchards, although the majority of the BMSB adults are still in surrounding areas of the orchards, feeding and reproducing on ornamental plants/woods. It appears that while the feeding on stone fruit was mostly concentrated on fruit, on apples the feeding happened mostly on foliage and growing shoots. The choice of insecticide treatments directed against other pests should at least suppress the portion of the BMSB population present in orchards. Visual monitoring for feeding adults is the only available, reliable monitoring technique at this time of the season. Currently utilized traps still are not reliable tools for monitoring BMSB. Please see the special BMSB issue of the PSU Fruit Times Newsletter for our most current recommendations: http://extension.psu.edu/fruit-times/combined-recent-stink-bug-articles-figures-and-tables
  • Based on the degree-day model for codling moth (CM) egg hatch, control procedures are still needed, although orchard specific treatment decisions should be based on pheromone trap moth captures. Applications of Altacor, Belt, Delegate, Tourismo or Voliam Flexi or Voliam Xpress should provide excellent control of CM. All products listed above will also provide control of tufted apple bud moth and obliquebanded leafroller larvae. Codling moth granulosis virus (Cyd-X) applied after the beginning of egg hatch should also provide good control of CM neonate larvae.
  • The flight of the second generation of Oriental fruit moth just started and control treatment(s) if needed should be considered during the week of June 20. Materials effective against CM will also control OFM.
  • If aphid control is necessary in the orchard, application of one of the neonicotinoid insecticides (i.e., Actara, Assail, Calypso or Provado) or Movento should provide good control of this pest. Some of listed neonicotinoid insecticides applied at higher rates will also provide direct contact mortality against BMSB as well as some other pests including codling moth.
  • If control of European red mite is necessary, acaricides such as Acramite, Envidor, Portal, Kanemite, Nexter or Zeal should be considered at this time of the season.
  • Traps for monitoring apple maggot should be placed in the orchards by now.