Managing Insect, Diseases, and Animal Pests

How do you manage rust on hollyhocks?

Question: Every year my great hollyhocks are practically destroyed by RUST. They enjoy full sun and super air circulation.  I trim, sanitize my tools constantly and use fungicides to no avail. Wondering if you have any advice? I am thinking of digging and destroying them as it’s way too time consuming at this point. Answer: […]

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Would you provide advice on controlling grasshoppers and Japanese beetles?

Question: I have experienced an invasion of grasshoppers that have devastated my flower gardens for the last two years. I’ve read NOLO bait is a good product to kill grasshopper eggs but this will not be available to purchase. Can you offer a recommendation? I would also like advice to deal with Japanese beetles. Answer: […]

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How do you get rid of voles and moles in the garden?

Question: How do you get rid of voles and moles in the garden? Online, I have seen that many of the usual methods, scent, and castor oil really don’t work. Can you suggest an effective method? Answer: Jonathan Foster, Special Project Assistant Voles and moles can be quite a headache for gardeners and homeowners. I […]

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How can I rid my greenhouse tomatoes and peppers of spider mites?

Question: I have a small greenhouse and had spider mites on my tomatoes and peppers last year, both in individual pots and in the permanent bed. Should I empty the soil from the pots and bed, assuring that there will be no spider mites this year or will they not winter over?  Answer: Jonathan Foster, […]

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What causes the pits/knots in my pears that makes them inedible?

Question: Last year many of our pear trees (we have about 10 varieties) had fruits with pits or knots in them making lots of the fruits nearly inedible. What causes this, and is there anything I can do to correct it? I always prune my trees in the same way, and also thin the fruitlets […]

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What caused a river birch tree to drop bark?

Question: My river birch is dropping deep segments of bark from the ground up to about three feet. It is not the normal sloughing off of the outer layer. What is coming off leaves bare wood underneath. Could this be a vole or a disease? I sprayed the base of tree with a hot pepper […]

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How can I grow tomatoes without them getting blight or other diseases?

Question: I have raised beds. The last two years my tomato plants, started from seed, have developed what we think is septorium (the fungus. It could be blight, I guess) starting from the lowest leaves and moving up the plant till all the plants are decimated. I have tried using different beds, digging out the […]

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What caused Patterson onions to rot from the top down?

Question: Thrips ruined our Gladiolus entirely. The Patterson onions that were growing nearby looked healthy. We harvested the onions and placed them for storage in the cool cellar. Now it seems, 100% of the bulbs are rotting from the top down. The Ebenezers seem unaffected.  What is the issue? Answer: Jonathan Foster, Community Education Assistant […]

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What are the spots on my bell peppers?

Question: I grow King of the North bell peppers each year and for the last several years, some of them have spots. The spots start from the inside of the peppers and eventually are on the outside skin and form dark rotted spots.  There is no insect damage that I can see, no holes or […]

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