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Weekly Insect Bytes for June 20

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Posted: June 19, 2014

This week marked the second consecutive week of increased captures of Oriental fruit moth (OFM) in pheromone traps placed both in peach and apple orchards. BMSB nymphs are present in orchards, which means a shift from “probable BMSB injuries” to actual nymphal feeding (and injuries) on fruit.

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.

Current Pest Status

Flight of first generation codling moth close to an end

The extended flight of the first generation codling moth (CM) is getting close to an end in most Pennsylvania orchards. As we have learned during the last few seasons, however, some orchards may still experience CM activities for an additional 2 to 3 weeks. 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 if and for how long CM control will be needed.

Second week of increased captures of Oriental fruit moth

This week marked the second consecutive week of increased captures of Oriental fruit moth (OFM) in pheromone traps placed both in peach and apple orchards. The egg hatch model provided by SkyBit Inc. forecasts about 10 percent OFM egg hatch for June 27th. If the numbers of moths collected in traps exceed 10 to 15 moths per week per trap insecticidal control will be warranted to manage this pest. If mating disruption materials are not used to control OFM, applications of Altacor®, Belt®, Delegate®, Tourismo® or Voliam Flexi® or Voliam Xpress® should provide excellent control.

Presence of BMSB nymphs means a shift to actual feeding and injuries

The brown marmorated stink bug (BMSB) adult populations are being observed in and around orchards. The newly identified two component combination of BMSB aggregation pheromone, which attracts BMSB adults and nymphs during daylight and night, provides a reliable tool for monitoring BMSB in orchards. The attractiveness of the commercial BMSB lure increases significantly in the later part of the season although we are already collecting BMSB adults in both Ag-Bio and Rescue traps deployed in orchards. Commercial BMSB lures and traps are available from Ag-Bio Inc. (Phone: 877-268-2020) and Sterling International, Inc. (Phone: 509-343-3625). The presence of BMSB nymphs in orchards means a shift from “probable BMSB injuries” to actual nymphal feeding (and injuries) on fruit and the change from “migratory” pest status of BMSB adults to “resident” pest status with nymphs. From mid July until November, traps baited with commercially available BMSB lures are very effective in detecting and capturing BMSB adults and nymphs.

Japanese beetles observed feeding in orchards

Last week the first Japanese beetles (JB) were observed feeding in orchards located in southern Pennsylvania. Materials recommended for the control of BMSB should also provide effective control of JB. If the control of BMSB is not necessary, and only JB needs to be controlled, in addition to neonicotinoid insecticides, Carbaryl (Sevin) should provide good control against JB. 

Tufted apple bud moth and obliquebanded leafroller males still being collected in pheromone traps

We continue to collect high numbers of tufted apple bud moth and obliquebanded leafroller male moths in pheromone traps. Although the larvae of both species should be already under control in most orchards, if live larvae are still observed feeding on foliage, insecticides such as Altacor, Belt, Delegate, Tourismo or Voliam Flexi or Voliam Xpress used for CM (or OFM) management should also provide very effective control of TABM and OBLR. If treatments for CM or OFM control are not needed, applications of Intrepid or BT based products should provide good control of leafrollers.

Emergency registration for dinotefuran

Similarly as during the 2013 season, dinotefuran (neonicotinoid, IRAC Group 4A), the active ingredient of insecticides Scorpion and Venom, received EPA Section 18 Emergency Exemption registration for use on stone and pome fruit in PA during the 2014 season. The current 2014 label is necessary for a legal use of above mentioned products containing dinotefuran. As of June 19, 2014 we still did not receive the Section 18 Emergency Exemption registration for bifenthrin, and therefore as of now, products containing active ingredient bifenthrin can not be used on apple or any stone fruit crop.

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