If you’re wondering how to get rid of pickleworms, you’ve come to the right place. Introducing parasitic wasps to your garden provides a natural method for controlling pickleworm populations, but there are several other effective strategies you can use too.
Pickleworms are tiny caterpillars that tunnel into squash, cucumbers, and melons. They can destroy an entire crop if left unchecked. The good news is that with the right approach, you can protect your garden without harsh chemicals.
How To Get Rid Of Pickleworms
Before you start, it helps to understand your enemy. Pickleworms are the larvae of a small brown moth. The moths lay eggs on young fruits and leaves. Once the eggs hatch, the worms burrow inside and start feeding.
You might not see them at first. The first sign is often a small hole in a fruit or wilting leaves. If you cut open an infected squash, you’ll find the worm inside along with frass (droppings).
Identify The Problem Early
Early detection is key. Check your plants every morning. Look for tiny eggs on the undersides of leaves and near flower buds. Also watch for small entry holes in young fruit.
- Look for yellow or white eggs, about the size of a pinhead
- Check for wilting shoots or blossoms
- Inspect fruit for small, dark entry points
- Notice any sawdust-like frass near holes
If you catch the infestation early, you have a much better chance of saving your crop. Once the worms are inside the fruit, chemical sprays won’t work.
Use Row Covers As A Physical Barrier
Row covers are lightweight fabric sheets that you drape over your plants. They block moths from reaching your crops to lay eggs. This is one of the simplest and most effective methods.
- Install hoops or stakes over your squash and cucumber beds
- Drape floating row cover material over the hoops
- Secure the edges with soil, rocks, or pins
- Remove the covers when plants start flowering so bees can pollinate
You need to put the covers on before moths become active. In warm climates, that means early spring. If you wait until you see damage, it’s too late for this method.
One downside is that you have to remove the covers for pollination. But you can time this carefully. Only uncover plants for a few hours in the morning when bees are active, then cover them back up.
Introduce Beneficial Insects
Parasitic wasps are tiny, non-stinging wasps that lay their eggs inside pickleworm larvae. The wasp eggs hatch and consume the worm from the inside. This sounds gruesome, but it’s nature’s way of keeping pests in check.
You can buy parasitic wasps online from garden supply stores. They come as pupae attached to cards. Release them in your garden according to the instructions.
- Trichogramma wasps attack pickleworm eggs
- Braconid wasps target the larvae
- Release them in the evening when it’s cooler
- Provide nectar plants like dill and fennel to keep them around
Other beneficial insects include ladybugs and lacewings. They eat pickleworm eggs and small larvae. You can attract them by planting flowers like marigolds, cosmos, and zinnias.
Apply Bt (Bacillus Thuringiensis)
Bt is a natural bacteria that kills caterpillars but is safe for people, pets, and beneficial insects. It works by disrupting the worm’s digestive system. You spray it on the leaves and fruit.
For best results, apply Bt when you first see eggs or small worms. The worms must eat the bacteria for it to work. Once they burrow inside the fruit, Bt won’t reach them.
- Mix Bt concentrate with water according to the label
- Spray in the evening to avoid sun degradation
- Cover all surfaces, especially undersides of leaves
- Reapply after rain or every 5-7 days
Bt is not a quick fix. It takes a few days for the worms to stop feeding and die. But it’s very effective if you stay consistent.
Use Neem Oil As A Repellent
Neem oil comes from the neem tree. It repels moths and can kill eggs and young larvae. It’s not as strong as Bt, but it’s a good option for prevention.
Mix neem oil with water and a few drops of dish soap. Spray your plants every 7-10 days. Focus on new growth and developing fruit.
- Use cold-pressed neem oil for best results
- Spray in the morning or evening to avoid leaf burn
- Do not spray when temperatures are above 90°F
- Wash fruit thoroughly before eating
Neem oil also helps with other pests like aphids and squash bugs. It’s a good all-around product for organic gardening.
Practice Crop Rotation
Pickleworms overwinter in the soil as pupae. If you plant squash in the same spot every year, the worms will emerge right next to your new plants. Rotating your crops breaks this cycle.
Move your cucurbit plants to a different bed each year. Wait at least two years before planting them in the same spot again. This reduces the number of overwintering worms.
Crop rotation also improves soil health and reduces other diseases. It’s a simple practice with big benefits.
Remove Infested Fruit Immediately
As soon as you see a worm hole, pick that fruit and dispose of it. Do not compost it, because the worms can survive in compost piles. Instead, seal it in a plastic bag and throw it in the trash.
Leaving infested fruit on the vine gives the worms time to mature and pupate. They will emerge as moths and lay more eggs. Quick removal breaks this cycle.
- Check plants daily during peak season
- Remove any fruit with visible damage
- Also remove badly damaged leaves
- Dispose of plant debris at the end of the season
Use Yellow Sticky Traps
Adult pickleworm moths are attracted to yellow. You can use yellow sticky traps to catch them before they lay eggs. Place the traps near your plants at the start of the growing season.
Hang the traps about 6-12 inches above the plants. Check them weekly and replace them when they’re full of insects. This method works best as part of a larger strategy.
Sticky traps also catch other pests like whiteflies and aphids. They don’t harm beneficial insects if you place them carefully.
Plant Trap Crops
Trap crops are plants that pickleworms prefer over your main crop. You plant them nearby to lure the pests away. This gives you time to treat the trap crop while protecting your valuable plants.
Good trap crops for pickleworms include:
- Yellow squash
- Zucchini
- Butternut squash
Plant these around the perimeter of your garden. Check them daily and remove any infested fruit. You can also spray the trap crops with Bt to kill the worms.
This method takes some extra work, but it can save your main harvest. Many organic farmers use trap crops successfully.
Time Your Planting Carefully
Pickleworm moths are most active in mid to late summer. If you plant your squash early, you can harvest before the population peaks. In warm climates, plant in early spring.
For fall crops, wait until the weather cools. Moths become less active when night temperatures drop below 60°F. A late planting might avoid the worst of the infestation.
Check your local extension service for pickleworm activity in your area. They often have specific planting date recommendations.
Encourage Natural Predators
Birds, spiders, and ground beetles all eat pickleworm moths and larvae. You can make your garden friendly for these predators by providing habitat.
- Leave some areas of your garden a little wild
- Add a small water source like a birdbath
- Plant native flowers and shrubs
- Avoid broad-spectrum insecticides that kill beneficials
A diverse garden ecosystem is more resilient to pests. The predators will do a lot of the work for you.
Use Diatomaceous Earth
Diatomaceous earth is a powder made from fossilized algae. It’s sharp on a microscopic level and cuts into the bodies of soft insects like pickleworm larvae. Sprinkle it around the base of your plants.
This works best for worms that drop to the ground to pupate. It won’t help much for worms already inside fruit. But it can reduce the next generation.
Use food-grade diatomaceous earth only. Wear a mask when applying it to avoid inhaling the dust.
Consider Resistant Varieties
Some squash and cucumber varieties are less attractive to pickleworms. While no variety is completely resistant, some show more tolerance. Look for varieties with tougher skin or faster fruit development.
Ask at your local nursery or extension office for recommendations. They know what works best in your region.
Frequently Asked Questions
What Is The Best Way To Get Rid Of Pickleworms Naturally?
The best natural method is using Bacillus thuringiensis (Bt) combined with row covers. Bt kills the worms without harming beneficial insects. Row covers prevent moths from laying eggs in the first place. For heavy infestations, add parasitic wasps to your routine.
Can Pickleworms Survive In Compost?
Yes, pickleworms can survive in a compost pile if the pile doesn’t get hot enough. The worms pupate in the soil and can emerge as moths from compost. It’s safer to dispose of infested fruit in the trash or bury it deep in the ground.
How Do I Prevent Pickleworms From Coming Back Every Year?
Prevention requires a combination of crop rotation, removing plant debris, and using row covers early in the season. Also clean up your garden thoroughly at the end of the year. Till the soil to expose pupae to birds and cold weather.
What Plants Do Pickleworms Attack Most?
Pickleworms prefer cucurbits like squash, zucchini, cucumbers, pumpkins, and melons. They are especially attracted to summer squash and zucchini. Winter squash and pumpkins are less vulnerable because they have tougher skins.
Is It Safe To Eat Fruit That Had Pickleworms?
You can eat fruit that had pickleworms if you cut out the damaged area. The worms themselves are not harmful if accidentally eaten, but they are not appetizing. Wash the fruit thoroughly and remove any discolored or tunneled parts.
Final Thoughts On Pickleworm Control
Getting rid of pickleworms takes consistant effort, but it’s possible without harsh chemicals. Start with prevention methods like row covers and crop rotation. Add Bt and neem oil as needed. Encourage beneficial insects and predators to help maintain balance.
Check your plants every day during the growing season. The sooner you spot a problem, the easier it is to fix. Remove infested fruit quickly and dispose of it properly.
Remember that no single method works perfectly every time. Combine several strategies for the best results. Your garden will thank you with a bountiful harvest of healthy squash and cucumbers.
With these tips, you can enjoy your summer vegetables without sharing them with pickleworms. Happy gardening.