1. The Himalayan blackberry has become a dreaded and despised weed across the world. Where have they not spread their spiky tendrils? Mexico Australia South Africa Chile

2. What area has the dubious honor of being the original home of the Himalayan blackberry? The Pacific Northwest The Himalayas Armenia Great Britain

3. Himalayan blackberry has many vices. Which is NOT one of them? Crowds out native plants Dead canes are a fire hazard Blocks trails with impassable thickets Leaves are poisonous to livestock

4. Himalayan blackberries can quickly overtake an area. Which is NOT one of the ways that they can spread? Canes root wherever they touch the ground Pieces of thorny cane become entangled in animal fur, fall out, and root Roots send up suckers Animals eat the berries and spread the seeds

5. In which habitat do Himalayan blackberries cause the most problems? Old-growth forests Riparian areas near streams and rivers Native-grass prairies Oak woodlands

6. What misguided but famous individual was responsible for the invasion of Himalayan blackberry in the Pacific Northwest? Meriwether Lewis William Clark George Washington Luther Burbank

7. In the past, ecologists actually recommended planting Himalayan blackberries in the Pacific Northwest. True False

8. Many weeds have natural controls- thing like bugs that eat them or diseases that plague them- that can be used to control them. Unfortunately for blackberry destroyers, natural controls for Himalayan blackberry are not available in the US, because of fears that they may infect cultivated blackberries. However, one natural control, scientifically known as Phragmidium violaceum, has been used in Australia and was recently discovered on Himalayan blackberry in Oregon. What is Phragmidium violaceum? An insect A small mammal that eats blackberry leaves A bacterial disease A fungal disease

9. If you want to get rid of Himalayan blackberries, which method has the greatest chance of success? Burn them to the ground Cut them down after flowering, dig up all root crowns, and spray any shoots that emerge in the fall with herbicides Cut them down with a brush mower Spray them with herbicide in the early spring

10. Do Himalayan blackberries have any benefits whatsoever to the environment? No, they are an utterly useless pox upon the face of the earth Yes, but they are outweighed by their deficits Yes, they really are pretty benign and on the whole do more harm than good Only in their natural environment in their country of origin