formats

Gold Spotted Oak Borer

 

GSOB2

Different Stages of GSOB Life Cycle

GSOB1

 

 

 

 

 

 

 

 

For a direct source of information from UC Cooperative Extension “click here

Treatment Options

ALWAYS READ PESTICIDE LABELS FROM FRONT TO BACK FOR ALL PERTINENT INFORMATION AND SAFTEY REQUIREMENTS. IT IS UNLAWFUL TO USE ANY PESTICIDE IN ANY WAY THAT IS NOT IN ACCORDANCE WITH THE LABEL.

Systemic Injection of Emamectin Benzoate      (Tree-äge®)

This will control adults and feeding larvae for 2-5 years. Currently CA residents require a special license to purchase this material.

Systemic Injection Price List By DBH (Emamectin Benzoate)

How to measure the “DBH” (diameter at breast height) of your tree:

Measure 54″ up from the ground on the trunk. Take measurement around tree trunk at this height. Divide that number by 3.14.

Example: 54 inches above the ground, the measurement around the trunk of the tree was 98 inches.

98/3.14=31.21

Round down. This tree is 31″ DBH.

Systemic Dinotefuran Spray

This will ONLY control adults feeding on the leaves for three months. It will not target larvae or eggs. You can purchase and apply this by following the links and directions below (highlighted words are links to purchase sites). For those who would rather leave it to the professionals, Precision Tree Experts can perform these treatments for $100.00-$200.00 depending ton the size of the tree.

  • Dinotefuran (one quart makes two gallons of material)                                              Note: This is a neonicotinoid. If used incorrectly and against label instructions this pesticide has been reported to be dangerous to bees.  Neonics are great tools for responsible hands. Not unlike a wrench or a hammer, which if used incorrectly could also kill bees.
  • Pentrabark (6 oz. per quart of Dinotefuran)
  • Two gallon sprayer
  • Nitril Gloves
  • Safety Glasses
  • Long sleeve shirt and long pants
  • Shoes and socks
  • Soaker hose 

Step 3: Timing

Best uptake happens three to four days after a good rain, on breezy days with temperatures from 65-75 degrees Fahrenheit. Studies suggest the best time of year for treatment is in May or June. I have had success treating Oaks after supplemental irrigation with soaker hoses. The hoses run overnight for one night two days prior to treatment. Please consult an irrigation specialist for help setting up your system.

Step 4: LOOK FOR NEARBY FLOWERING PLANTS THAT COULD BE IN THE PATH OF MATERIAL DRIFT. THIS PRODUCT CAN BE HAZARDOUS TO HONEY BEES IF MATERIAL IS ALLOWED TO SETTLE ON FLOWERS OR OTHER BEE FORAGING SITES. AVOID TREATING THOSE TREES OR SET UP A BARRIER TO PROTECT NEARBY FLOWERS. This is bark applied systemic insecticide. If applied correctly, there is NO RISK TO BEES.

Step 5: Spray lowest 4 feet of trunk on trees with solution (One quart of Dinotefuran and 6 oz of Pentra Bark to 1.75 gallons of water)

Step 6: Repeat Step 3 annually

LIMITATIONS: DO NOT EXCEED 5 GALLONS OF MIXED SOLUTION PER ACRE PER YEAR. IF NECESSARY, ALTERNATE TREATMENTS ACCORDING TO SEVERITY OF OUTBREAK. DO NOT APPLY WHEN WIND OR OTHER CONDITIONS WILL MOVE SPRAY PARTICLES IN CONTACT WITH SURFACE WATER OR PLANTS IN FLOWER. IT IS UNLAWFUL TO USE ANY PESTICIDE IN ANY WAY THAT IS NOT IN ACCORDANCE WITH THE LABEL.

 

Barrier Sprays of Bifenthrin

Provides 3-4 months of control of adults and eggs that make contact with treated areas of bark. You can purchase and apply this by following the links and directions below (highlighted words are links to purchase sites). Start at the ground and treat all accessible tree parts larger than 6 inches in diameter. (video)

  • Baseline® (one quart makes 100 gallons of material)                                                 Note: This is an insecticide. If used incorrectly and against label instructions this pesticide has been reported to be dangerous to bees.  Pyrethroids are great tools for responsible hands. Not unlike a wrench or a hammer, which if used incorrectly could also kill bees.
  • Two gallon sprayer
  • Nitril Gloves
  • Safety Glasses
  • Long sleeve shirt and long pants
  • Shoes and socks

Apply insecticide to all accessible bark starting at the ground and on all tree parts larger than 6 inches in diameter. Should your equipment not be adequate for complete coverage, Precision Tree Experts has the equipment necessary to protect your entire tree.