Weekly Insect Bytes for June 3, 2011

Posted: June 3, 2011

The insect pest control observations and recommendations presented in this update are for the south-central part of Pennsylvania based on observations in Adams County. It is important to base your integrated pest management program on scouting observations in your own orchards.
San Jose Scale

San Jose Scale

Current pest status

  • The 2011 season biofix for the Oriental fruit moth was established on April 19, red banded leafroller on April 5, codling moth on May 7, spotted tentiform leafminer on April 6, tufted apple bud moth on May 11 and obliquebanded leafroller the biofix was established on May 29.
  • The move of brown marmorated stink bug adults (BMSB) from overwintering shelters is almost completed by now. This past week we observed first injuries on stone fruit caused by adult BMSB feeding. At the same time we also observed feeding of adult BMSB on ornamental plants/woods around orchards. It appears that while the feeding on stone fruit was mostly concentrated on fruit, the feeding that happened on apples mostly occurred on foliage and growing shoots. The choice of insecticide treatments directed against other pests should at least suppress the portion of 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 just released special BMSB issue of the Penn State Fruit Times Newsletter for our most current recommendations.
  • Based in the degree-day model for CM egg hatch, this is the time to control codling moth. 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.
  • 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 be effective. 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.
  • Scale insects can still be controlled with a post-bloom application of Esteem or Centaur with an addition of a low rate of oil or application(s) of Movento. The secret to good scale control is good coverage. Growers should use a minimum of 100 gallons per acre or more depending on the size of their trees.
  • 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.

Contact Information

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