What Causes Holes In Cucumbers And How to Prevent It?


Holes in cucumbers are caused by pests like cucumber beetles, slugs, and caterpillars. To prevent it, inspect plants regularly, use row covers, plant resistant varieties, practice companion planting, use organic pest control methods, and keep your garden clean.

Have you ever picked up a cucumber from the store only to find it riddled with holes? If so, you’re not alone! 

Holes in cucumbers are all too common, both for cucumber farmers and for people who buy cucumbers. But what causes holes in cucumbers, and what can be done to prevent them? 

In this blog post, I’m going to discuss some causes of holes in cucumbers and how to prevent them. Keep reading to learn more about this vexing problem!

Why do my cucumbers have holes inside?

Pests like striped and spotted cucumber beetles, slugs, pickle worms, and aphids can damage cucumbers by causing holes inside them. These insects lay their larvae in the cucumber, often causing the cucumber leaves to wilt or form holes. 

holes in cucumber

Blossom end rot and bacterial wilt can also cause holes in cucumber slices and plants, resulting in a less-than-desirable harvest. 

Row covers and netting can help prevent insect infestation, but any holes found in cucumbers should be cut out as they can be up to an inch long.

Can you eat cucumber with holes inside?

Yes, you can eat cucumbers with holes inside. However, if the holes are accompanied by yellow discoloration, spots, or other signs of rot, you should discard them. 

You may also see holes in cucumber leaves or on the cucumber plant due to the presence of the striped cucumber beetle. In any case, it is best to inspect the cucumbers and squash any worm-like pests you find before consuming them.

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What Causes Holes in Cucumbers?

causes of Holes in Cucumbers

Holes in cucumbers can have many causes, such as slugs, cucumber beetles, pickle worms, aphids, pollination deficiencies, belly rot, and scab.

Here, I’ll look at each cause and how to prevent it.


Slugs are a common cause of holes in cucumbers. Slugs feed on the leaves and stems of cucumbers, and can sometimes burrow their way into the fruit. Slugs are attracted to moist and dark environments. So you can often find them on the underside of leaves or in damp soil.

To help prevent slugs from attacking your cucumbers, try companion planting with strong-smelling plants like garlic and herbs. In addition, you can use slug traps and beer traps to attract and kill slugs. Also, hand-picking slugs off your plants can be effective.

Cucumber Beetles

Cucumber Beetles

Cucumber beetles can cause holes in cucumbers due to their larvae eating away at the vegetable’s flesh. 

Adult cucumber beetles have yellow-green bodies with black stripes or spots, while the larvae are usually light-colored and have a hooked shape. They often feed on the surface of the cucumber and can spread diseases like bacterial wilt and mosaic virus. 

To protect your cucumber plants from cucumber beetles, you should cover them with row covers, apply pesticide sprays, or mix up some natural deterrents such as garlic spray or neem oil.


Pickleworms are a common pest that can cause holes in cucumber plants. They are small, white caterpillars that feed on the leaves and stems of cucumber plants. The larvae will also bore into the fruits and cause damage. 

To identify these pests, look for silky webs near the fruits. 

To prevent pickleworm damage, it’s important to keep the cucumber foliage free of debris and to monitor your plants for signs of infestation. A variety of traps and chemical controls are available to control pickleworm populations. If there are a lot of them, you might want to try crop rotation or intercropping to get rid of them.



Aphids are small sap-sucking insects that feed on the foliage and stems of plants. They can be a major problem for cucumbers, causing damage to the plant, wilting leaves and stems, and leaving behind small holes in the cucumber skin. 

Aphids can also carry diseases, so it is important to keep an eye out for them. Control of aphids is best achieved with an integrated pest management strategy, including insecticidal soap or horticultural oil applications. 

Organic gardeners may want to try companion planting with plants such as garlic, oregano, or marigolds, which can help to deter these pests.

Pollination deficiencies

Cucumbers, like other cucurbits, need to be adequately pollinated to produce healthy fruit. Poor pollination can result in poor fruit set, resulting in cucumbers with misshapen fruit, or holes inside the fruit. 

Factors that can lead to poor pollination include temperature, humidity, wind, and low bee populations. 

To prevent this problem, gardeners should ensure their cucumber plants are adequately pollinated by providing conditions conducive to bees and other pollinators. Gardeners may or on so need to hand pollinate if conditions are not suitable for bees.

Belly Rot

Belly rot is one of the most common causes of holes in cucumbers. It is a fungal disease that results in round, sunken, grey spots on the cucumber’s skin. Once the cucumber has been cut open, these spots are revealed to be soft and water-soaked. 

This problem can be avoided by planting varieties that are resistant to disease, not watering from above, and using fungicides. Additionally, proper crop rotation should be employed to prevent recurring infections. 

If you see signs of belly rot, promptly remove and destroy any infected cucumbers or plants to prevent further spread of the disease.


Scab is a fungal disease that can cause cucumbers to develop holes and discolored patches. It’s caused by a fungus known as Cladosporium cucumerinum, which can survive in soil or other surfaces for long periods. 

Scab also affects other cucurbit vegetables, such as melons and squash. Scabs on cucumbers can be stopped by making sure the disease doesn’t spread by not using soil or plants that are already infected. 

It’s also important to use well-drained soil and water the plants at ground level instead of from overhead. Fungicides are also effective in preventing scab from developing in cucumbers.

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Preventive Measures For Preventing Holes in Cucumbers

Preventive Measures For Preventing Holes in Cucumbers

Cucumbers are a popular vegetable in many homes because they taste good and are good for you. However, pests like cucumber beetles, slugs, and caterpillars may be to blame for holes in cucumbers, which can be frustrating.

Here are some preventive measures you can take to prevent holes in cucumbers.

  • Inspect Your Plants Regularly: Regularly inspecting your cucumber plants for pests is essential. Look for signs of damage, such as holes in leaves or stems. Remove any damaged leaves or fruits as soon as possible to prevent the pests from spreading.
  • Use Row Covers: Covering your cucumber plants with row covers is an effective way to prevent pests from reaching your plants. Row covers are made from lightweight materials that allow sunlight, air, and water to pass through while protecting your plants from pests.
  • Plant-Resistant Varieties: Some cucumber varieties are naturally resistant to pests. Choosing these varieties can help you avoid pest problems. For example, the “Marketmore” cucumber is resistant to cucumber beetles and some diseases.
  • Companion planting: Planting plants together that naturally keep pests away can be a good way to keep them away. For example, planting marigolds or nasturtiums near your cucumber plants can help repel cucumber beetles.
  • Use Organic Pest Control Methods: If you notice pest problems in your cucumber plants, use organic pest control methods to avoid using harmful chemicals. For example, spraying neem oil or garlic spray can help repel pests.
  • Keep Your Garden Clean: Keeping your garden clean can help prevent pest problems. Remove any debris, such as fallen leaves or fruits, as they can attract pests.

By taking these preventive measures, you can avoid holes in cucumbers and enjoy a bountiful harvest.

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