Cutworms can be stopped by placing cardboard collars around the stems of young plants. If you are wondering how to get rid of cutworms in your garden, you have come to the right place. These pests are sneaky and can destroy seedlings overnight.
They hide in the soil during the day and come out at night to feed. The good news is that you can control them without harsh chemicals. This guide will show you simple, effective methods to protect your plants.
Let’s get straight to the point. You need a plan that works fast. Below is a complete outline of what we will cover.
How To Get Rid Of Cutworms
This section covers the most reliable strategies. You will learn physical barriers, biological controls, and cultural practices. Each method is easy to apply and proven to work.
Use Physical Barriers
Physical barriers are the best first step. They stop cutworms from reaching your plants. Here are the top options:
- Cardboard collars: Cut a toilet paper roll into 2-inch rings. Place them around each stem. Push them half an inch into the soil.
- Aluminum foil wraps: Wrap foil around the base of stems. Make it about 3 inches tall. This prevents cutworms from climbing.
- Plastic cups: Cut the bottom off a small cup. Place it over the seedling like a mini fence.
Check these barriers every few days. Replace them if they get damaged. They work best for young transplants.
Handpick Cutworms At Night
Cutworms are nocturnal. Go out with a flashlight after dark. Look for them near the base of damaged plants. They curl up when disturbed.
- Wear gloves and carry a bucket of soapy water.
- Pick up each cutworm you find.
- Drop them into the soapy water to kill them.
Do this for a few nights in a row. It reduces the population quickly. This method is free and very effective.
Apply Beneficial Nematodes
Beneficial nematodes are microscopic worms. They hunt and kill cutworm larvae in the soil. You can buy them online or at garden centers.
Mix them with water according to the package instructions. Apply the solution to your garden soil in the evening. Water the area well after application.
Nematodes are safe for pets, kids, and beneficial insects. They provide long-term control. Reapply every few weeks if needed.
Use Diatomaceous Earth
Diatomaceous earth is a powder made from fossilized algae. It cuts the cutworms’ bodies and dehydrates them. Sprinkle a ring of it around each plant.
Make sure the powder stays dry to remain effective. Reapply after rain or watering. Wear a dust mask to avoid inhaling the fine particles.
Encourage Natural Predators
Birds, ground beetles, and parasitic wasps eat cutworms. Attract them to your garden. Plant flowers like dill, fennel, and yarrow.
Provide water sources like shallow dishes. Avoid using broad-spectrum insecticides. They kill the good bugs too.
Practice Garden Cleanup
Cutworms hide in plant debris and weeds. Keep your garden tidy. Remove dead leaves and old mulch in spring.
Till the soil in fall to expose cutworm pupae. This disrupts their life cycle. Rotate your crops each year to prevent buildup.
Identifying Cutworm Damage
You need to confirm cutworms are the problem. Other pests can cause similar damage. Look for these signs:
- Seedlings cut off at the soil line.
- Plants wilting or falling over suddenly.
- Small holes in leaves near the ground.
- Cutworms hiding in the top inch of soil.
Check your garden early in the morning. Fresh damage is easier to spot. If you see these signs, act immediately.
Common Cutworm Species
There are several types of cutworms. The most common ones include:
- Black cutworm: Dark gray with a greasy look. Attacks many vegetables.
- Variegated cutworm: Brown with yellow spots. Feeds on leaves and stems.
- Armyworm: Green or brown with stripes. Moves in large groups.
Each species behaves slightly differently. But the control methods are the same. Focus on prevention and early action.
Natural And Organic Control Methods
You do not need synthetic pesticides. These natural options are safe and effective. They protect your garden and the environment.
Neem Oil Spray
Neem oil is a natural insecticide. It disrupts the feeding and growth of cutworms. Mix 1 teaspoon of neem oil with 1 quart of water.
Add a few drops of dish soap to help it stick. Spray the soil and plant bases in the evening. Repeat every 5 to 7 days.
Bacillus Thuringiensis (Bt)
Bt is a bacteria that kills caterpillars. It is safe for humans and pets. Apply it as a spray to the foliage and soil.
Cutworms ingest the bacteria and stop feeding. They die within a few days. Use it when you see active damage.
Cornmeal Or Bran Baits
Mix cornmeal or bran with a little water and sugar. Spread it around the garden at night. Cutworms eat it and cannot digest it.
This method works best for small infestations. Do not use too much, or it might attract other pests.
Preventing Cutworms In The Future
Prevention is easier than treatment. Follow these steps to keep cutworms away. Your plants will stay healthy and strong.
Delay Planting
Cutworms are most active in early spring. Wait until the soil warms up. Plant your seedlings after the first flush of cutworms has passed.
Check local pest forecasts. Many extension services provide this information. A few weeks of delay can make a big difference.
Use Row Covers
Floating row covers are lightweight fabric. They block cutworms from reaching plants. Place them over your beds right after planting.
Secure the edges with soil or rocks. Remove the covers when plants are large enough. This also protects against other pests.
Maintain Healthy Soil
Healthy soil supports strong plants. Cutworms target weak or stressed seedlings. Add compost and organic matter to your soil.
Water consistently and avoid over-fertilizing. Strong plants can withstand minor damage. They recover faster from pest attacks.
Chemical Control Options (Last Resort)
Use chemicals only if natural methods fail. Choose products labeled for cutworms. Apply them carefully to avoid harming pollinators.
Insecticidal Soap
Insecticidal soap kills cutworms on contact. Spray it directly on the pests. It is less toxic than synthetic pesticides.
Apply in the evening when cutworms are active. Repeat as needed. Avoid spraying flowers to protect bees.
Pyrethrin Sprays
Pyrethrin is derived from chrysanthemums. It works quickly against cutworms. Use it as a spot treatment.
Follow the label instructions exactly. Do not spray in direct sunlight. It can degrade quickly.
Frequently Asked Questions
What is the fastest way to get rid of cutworms?
The fastest method is handpicking at night. Combine it with cardboard collars for immediate protection. This stops further damage right away.
Will cutworms kill my plants?
Yes, they can kill young seedlings by cutting the stem. Older plants usually survive but may be stunted. Quick action saves your garden.
Can cutworms infest raised beds?
Yes, cutworms can climb into raised beds. Use the same control methods. Barriers and nematodes work well in raised beds.
How do I know if cutworms are gone?
Check for new damage each morning. If you see no fresh cuts for a week, the infestation is likely over. Continue monitoring regularly.
Are cutworms harmful to humans?
No, cutworms are not harmful to humans. They do not bite or spread diseases. They only damage plants.
Final Thoughts On Cutworm Control
Cutworms are frustrating, but you can beat them. Start with physical barriers and handpicking. Add biological controls like nematodes for long-term success.
Keep your garden clean and healthy. Monitor your plants every day. With these strategies, you will protect your seedlings and enjoy a thriving garden.
Remember to act quickly when you see damage. The sooner you start, the less harm they cause. You have all the tools you need now.