A few fast tips can help deal with slugs
I think you'd be hard pressed to find a gardener who, at some point or another, hasn't been plagued by slugs. These members of the mollusk family are herbivores that greatly enjoy nibbling tender seedlings, hostas, tomatoes and lots of other common garden plants.
Slugs are particularly problematic during wet periods and in shaded gardens. They are most active at night and on cloudy, rainy days. If you are finding tattered holes in plant leaves but can't figure out who the culprit is, head out to the garden after dark with a flashlight in tow, and look for the slimy little guys or the silvery trails they leave behind.
Slugs are hermaphroditic, meaning each one has both male and female reproductive organs, so every one of them can lay hundreds of eggs a year. They cannot, however, mate with themselves — they need a partner for fertilization. If you have a regular slug problem, the trick is to maintain a control program from early spring all the way through fall in order to keep a tight rein on their population.
First and foremost, look to preventative techniques for controlling slugs. In areas where there is a history of slug damage, avoid using loose mulching materials. Straw, hay, pine bark and shredded hardwood serve as a great hiding place for adult slugs, in addition to being the perfect shelter for egg laying. Use compost, mushroom manure, or leaf mold to mulch those areas instead.
Another preventative technique is to surround the base of susceptible plants with a collar of copper. Slugs experience a mild electric shock when they come in contact with copper, so they avoid it. This technique is a lot of work, though, if you are talking about dozens of hosta or zinnia, but it does work. If you garden using raised beds, simply make a copper “moat” around the entire bed to keep the slugs out.
While trapping slugs in beer is useful, it's also really gross. You have to empty the traps daily to avoid having a festering mess. The slugs are attracted to the yeast and then fall in and drown. Shallow saucers of beer are sunk in to ground level to allow easy access to the slugs. Surprisingly, the slugs don't fall in because they get drunk — in fact some studies show that non-alcoholic beer works even better than regular beer does.
But, by far, my favorite method of slug control is to poison them using a bait. Not just any bait will do, though, since some baits are poisonous to other critters as well. Avoid using traditional slug and snail baits containing metaldehyde or methiocarb as their active ingredient. Metaldehyde is extremely toxic to pets — as little as a teaspoon can kill a cat — and methiocarb is poisonous to many insects and earthworms.
Turn instead to baits using iron phosphate as their active ingredient (brand names include Sluggo, Escar-Go, and others). These baits are not toxic to pets and wildlife, are safe to use around kids and eventually, if they aren't eaten by slugs, will break down to iron and phosphorus — two essential plant nutrients. The baits are sprinkled on the soil surface around plants, the slugs consume the bait, stop feeding immediately and die within a few days.
Horticulturist Jessica Walliser co-hosts “The Organic Gardeners” at 7 a.m. Sundays on KDKA Radio. She is the author of several gardening books, including “Grow Organic” and “Good Bug, Bad Bug.” Her website is www.jessicawalliser.com.
Send your gardening or landscaping questions to email@example.com or The Good Earth, 503 Martindale St., 3rd Floor, D.L. Clark Building, Pittsburgh, PA 15212.
Show commenting policy
TribLive commenting policy
You are solely responsible for your comments and by using TribLive.com you agree to our Terms of Service.
We moderate comments. Our goal is to provide substantive commentary for a general readership. By screening submissions, we provide a space where readers can share intelligent and informed commentary that enhances the quality of our news and information.
While most comments will be posted if they are on-topic and not abusive, moderating decisions are subjective. We will make them as carefully and consistently as we can. Because of the volume of reader comments, we cannot review individual moderation decisions with readers.
We value thoughtful comments representing a range of views that make their point quickly and politely. We make an effort to protect discussions from repeated comments either by the same reader or different readers.
We follow the same standards for taste as the daily newspaper. A few things we won't tolerate: personal attacks, obscenity, vulgarity, profanity (including expletives and letters followed by dashes), commercial promotion, impersonations, incoherence, proselytizing and SHOUTING. Don't include URLs to Web sites.
We do not edit comments. They are either approved or deleted. We reserve the right to edit a comment that is quoted or excerpted in an article. In this case, we may fix spelling and punctuation.
We welcome strong opinions and criticism of our work, but we don't want comments to become bogged down with discussions of our policies and we will moderate accordingly.
We appreciate it when readers and people quoted in articles or blog posts point out errors of fact or emphasis and will investigate all assertions. But these suggestions should be sent via e-mail. To avoid distracting other readers, we won't publish comments that suggest a correction. Instead, corrections will be made in a blog post or in an article.
- Police seek help finding missing man
- Wolf in Leechburg: ‘Get it right this time’ in the election for Pa. governor
- VA promotion for administrator stuns legislator
- ‘Rocky Horror’ takes center stage at Regent Square, Greensburg venues
- Frazier cross country letter winner stays on the run
- Pirates acquire infielder from Indians, designate Axford, Gomez for assignment
- Linebacker Harrison coming along slowly since return to Steelers
- Mon Valley YMCA scholarship auction planned
- Armstrong in test program using slag on icy roads
- Man arrested after showing up at hospital with gunshot wounds
- Many musicians enjoyed roles in legacy of Harmoneers