1. We live in Colorado and have a 50 year old black walnut that has dying limbs near the top. We live near the center of the "thousand cankers" outbreak near Boulder, Colorado. Is there anything that can be done for this tree? Published: October 20, 2009
2. Will poorly composted wood chips used as mulch around my trees spread disease to the trees' roots? Published: August 26, 2009
3. What causes my cucumbers to become bitter tasting? Published: August 06, 2009
4. My tomato fruits have small yellow specks on the surface. When the fruits are peeled, those specks form a tough spot that must be cut off before eating the tomatoes. What's wrong? Published: November 03, 2008
5. What is wrong with the spotted and browning foliage of my tomato? Published: November 03, 2008
6. Do roses get diseases in Colorado? Published: October 28, 2008
7. Are there diseases that affect crabapples? Published: September 15, 2008
8. What is white pine blister rust and how is it managed? Published: September 15, 2008
9. There are numerous disagreeable yellow or white patches resembling "dog vomit" on the surface of the mulch around my shrubs and flowers - what is it and how do I get rid of it? Published: September 15, 2008
10. What are the symptoms of daylily rust and how is it treated? Published: September 14, 2008
11. Why does my ash tree have irregular brown blotches on leaf margins and many leaflets falling? Published: September 14, 2008
12. How can I avoid damping-off disease in my seedling trays? Published: September 05, 2008
13. Why are fungus “brackets” or “conks” growing on the trunks of some landscape shade trees? Published: September 05, 2008
14. Why did some oak leaves turn brown and drop prematurely this fall, instead of waiting until October to turn brown? Published: September 05, 2008
15. I have a yellow-poplar that is losing its leaves. The leaves, both green and yellow, have black spots on their undersides. The yellow leaves are falling to the ground. It looks like fall in the middle of summer. What is wrong with my tree? Published: May 16, 2008
16. For the past couple of years, I've had a problem with what I think is early blight on my tomatoes. I am thinking of trying the bags that hang the plants upside down. What is the longest that any of the types of blight stay in the soil? If I use the hangers this season, will my soil be safe next year? Published: May 15, 2008
17. Is there any tie between the fungus causing Septoria leaf spot on tomatoes and the fungus causing damage on flowering crab apples? Published: May 15, 2008
18. What causes brown spots or blotches on leaves of cucumbers, cantaloupes, and watermelons? Published: May 15, 2008
19. I have a small patch of sweet corn with one early and one late variety. The late variety has become infected with smut. Is there a fungicide I can apply to keep it from spreading? Published: May 15, 2008
20. I live in Colorado. What is wrong with a clematis that gets what looks like rust on the leaves and doesn't grow much? Published: May 15, 2008
21. We live in Colorado. What is wrong with our new scarlet Hawthorn? The leaves are falling off and the remaining leaves are covered with small black dots. Published: May 15, 2008
22. i live in Colorado. What's the problem with our Autumn Blaze maple tree? Its leaves have turned yellow, and about half of the leaves have black spots and are dying. Published: May 15, 2008
23. My neighbor and I have mature green ash trees next to each other. My tree is in good health, but the neighbor's tree has been declining; fewer, smaller, curled leaves, which drop in midsummer. I have heard of ash yellows, could that be what is attacking my neighbor's tree? Is there a way to diagnose the tree, and what can I do to protect my tree? Published: April 22, 2008
24. I have garden phlox that gets yellow and mottled leaves every year. It affects it enough to reduce the blooms. Could this be lack of water or perhaps a disease or deficiency? I live in Minnesota. Published: April 22, 2008
25. I have a Rosa alba (Maiden's Blush) rose, and it is a huge bush covered with light pink buds in spring. The blooms partially open, get stuck, and look deformed, while other buds turn brown. Some little brown beetles appear on the plant during warmer months. What should I do? Published: April 22, 2008
26. I live in Colorado. What is the best approach to limit the damage done by snow mold? Should I spray a fungicide on affected areas to keep it from spreading? Published: April 22, 2008
27. What causes swellings on the roots of tomatoes or other vegetables? Published: April 09, 2008
28. Why are the ends of tomato fruits turning black and rotting? Published: April 09, 2008
29. My cucumber, cantaloupe, squash, and pumpkin leaves have a white powdery substance on them and are dying. What is the problem? Published: April 09, 2008
30. Why do cucumber, cantaloupe, and watermelon leaves develop yellow spots and blotches on them? Published: April 09, 2008

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