Research Briefs Test

Research Briefs Test
Please fill out your email address in the first box and your name, ISA cert. no. & specialty in the second box. Answer the questions below and when you are finished, press submit.

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Name :

Question: 1. Which birch has the highest survival rate?
Betula pendula
B. utilis var. jacquemontii
B. nigra ‘Cully’
B. populifolia ‘Whitespire’

Question: 2. Which birch has the greatest annual change in tree height?
B. pendula
B. populifolia
B. utilis
B. nigra

Question: 3. The four largest US arboricultural firms account for:
2 percent of combined industry receipts.
4 percent of combined industry receipts.
25 percent of combined industry receipts.
75 percent of combined industry receipts.

Question: 4. Coast live oak trees were inoculated with what to control Phytophthora ramorum?
Pentrabark™
injections of phosphites
bark applications of phosphites and Pentrabark™
all of the above

Question: 5. Pouches of verbenone pheromone of the mountain pine beetle, stapled to lodgepole pines:
revealed new mass attacks on 3.6% of available trees.
revealed new mass attacks on 3.6% of trees where no infected trees were removed.
revealed treatment is necessary every four months.
revealed treatment is necessary after insect flight.

Question: 6. The best approach to extend the soil volume accessible to roots is:
structural, load-bearing soil.
sand-based load-bearing soil.
conventional planting pits.
super planting pits.

Question: 7. A super planting pit offers:
24 cu ft of soil for each tree.
32 cu ft of soil for each tree.
129 cu ft of soil for each tree.
525 cu ft of soil for each tree.

Question: 8. Emerald ash borer causes more canopy dieback in:
white ash.
blue ash.
mountain ash.
green ash.

Question: 9. The yellow-bellied sapsucker has what as the major part of its diet?
phloem sap
xylem sap
trees with high quality sap
insects

Question: 10. Excess sap from sapsucker holes attract:
black bark fungi.
raccoons.
bears.
hummingbirds.

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