Leslie Massey
Nocturnal pests can be a menace to your tomato plants. From insects like hornworms and aphids to animals such as deer, rabbits, and even possums, there are many culprits that may be responsible for the damage to your plants. To identify the pest, look for clues such as chewed leaves, half-eaten fruits, droppings, or visible animal tracks and slime trails. Once you know the intruder, you can implement preventative measures to protect your tomato harvest.
| Characteristics | Values |
|---|---|
| Nocturnal pests | Hornworms, aphids, cutworms, beetles, slugs, snails, earwigs, voles, mice, rats, possums, deer, rabbits, raccoons, opossums, skunks |
| Damage caused | Ragged edges on leaves, 45-degree angle cuts, half-eaten tomatoes, chewed leaves, distinctive grooves in leaves, digging tunnels, droppings |
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What You'll Learn
- Nocturnal pests: hornworms, aphids, voles, mice, rats, slugs, snails
- Day-time pests: squirrels, chipmunks, birds, whiteflies, spider mites
- Signs of pests: chewed leaves, half-eaten fruit, droppings, slime trails, grooves in leaves
- Prevention: fencing, repellents, protective netting, greenhouses, collars
- Identification: take photos, look for animal tracks, inspect plant debris
Nocturnal pests: hornworms, aphids, voles, mice, rats, slugs, snails
Tomato plants are often under attack from a variety of pests, both during the day and at night. Nocturnal pests that target tomato plants include hornworms, aphids, voles, mice, rats, slugs, and snails.
Hornworms
Hornworms are green caterpillars that blend in with the foliage of tomato plants. They feed non-stop, creating spotty and
Aphids
Aphids are tiny, soft-bodied insects that can be yellow, green, or brownish-gray. They are sucking insects that drain the vital juices from the leaves of tomato plants, leaving them yellowed and weakened. Aphids also excrete a sticky substance called honeydew, which attracts ants. While aphids are easily targeted by pest controls due to their soft bodies, they multiply rapidly, so multiple sprays are usually necessary.
Voles, Mice, and Rats
Voles, mice, and rats are small rodents that can cause significant damage to tomato plants. They may leave droppings and partially eaten tomatoes at the base of the plant. These pests can be controlled through trapping, baiting, or using repellents such as moth balls.
Slugs and Snails
Slugs and snails are common nocturnal pests that feed on tomato plants, especially when the weather is wet. They hide in the leaf matter or mulch during the day and come out at night to feed on the leaves and fruits. They leave behind irregularly shaped holes in the leaves and silvery slime trails. To control slugs and snails, beer traps can be used, or natural repellents such as coffee grounds or crushed eggshells can be scattered around the base of the plant.
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Day-time pests: squirrels, chipmunks, birds, whiteflies, spider mites
Squirrels, chipmunks, birds, whiteflies, and spider mites are among the pests that can damage tomato plants during the day. Squirrels, for example, may eat a whole tomato, but they frequently take bites out of several tomatoes, ruining them all. They leave medium to large holes in one side of the fruit, and they may also damage other plants and flowers. To protect your tomato plants from squirrels, you can try building cages around the plants or the entire bed using chicken wire fencing or hardware cloth. Adding bird netting on top can provide additional protection. Repellent sprays, such as those made with chili peppers, can also be effective.
Chipmunks, like squirrels, may feed on tomatoes during the day and leave similar damage. They may take a bite out of a tomato and leave the rest, or they may eat the entire fruit. To prevent chipmunks from accessing your tomato plants, you can try excluding them by installing fences or creating physical barriers. Exclusion methods can include burying wire mesh or using netting to cover plants.
Birds can also pose a threat to tomato plants during the day. They may pluck or peck at the tomatoes, causing damage or destroying the fruit. To deter birds, consider using netting or bird netting to cover your plants. Another option is to provide alternative food sources for the birds, such as planting sacrificial plants that they can feed on instead.
Whiteflies are tiny insects that can infest tomato plants and cause significant damage. They feed on the leaves, causing them to yellow and curl, and their honeydew secretion leads to the growth of sooty mold, giving the leaves a shiny or blackened appearance. To control whiteflies, you can use reflective polyethylene mulches on planting beds before seeding or transplanting. This helps reduce the rate of colonization and delays the buildup of damaging whitefly populations.
Spider mites are another potential pest of tomato plants during the day. They feed on the leaves, sucking out the plant's sap, which can cause leaf discoloration, stippling, or even leaf drop. Spider mites thrive in hot and dry conditions, and their populations can increase rapidly under optimal conditions. To manage spider mites, you can introduce natural predators such as ladybugs or predatory mites, or you can use miticides specifically designed for spider mites.
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Signs of pests: chewed leaves, half-eaten fruit, droppings, slime trails, grooves in leaves
If you're finding chewed leaves on your tomato plants, it could be the work of vine weevils, which leave mouth-shaped bites on the edges of leaves. Alternatively, it could be voles, which chew leaves and stems, often moving down a row of seedlings and toppling plants. Other possible causes include caterpillars, earwigs, slugs, and beetles.
If your tomato plants are only being eaten at night, likely culprits include earwigs, slugs, and caterpillars, which are all nocturnal. Slugs and snails leave silvery slime trails, which can be a sign that they are responsible for leaf damage.
Half-eaten fruit could be the work of chipmunks and squirrels, which may develop a taste for fruit such as tomatoes. It could also be the result of plum curculio, apple maggot fly, or codling moth, which can afflict as much as 90% of fruit in a bad year.
Droppings are another sign that your tomato plants are being targeted by pests. Raccoon faeces, for example, tend to be large (2-3 inches long) and similar to medium-sized dog droppings, but with a darker colour, tubular shape, and granular texture. Squirrel droppings, on the other hand, are smaller than rat faeces and have a rounded end, whereas rodents have a tapered end.
Grooves in leaves could be caused by thrips, which are yellow-black, very thin, and about 2mm long. Their presence results in mottled and discoloured leaves, with signs of bleaching.
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Prevention: fencing, repellents, protective netting, greenhouses, collars
If you're experiencing issues with pests eating your tomato plants at night, there are several preventative measures you can take to protect your crop. Here are some effective methods:
Fencing
A sturdy wire fence can serve a dual purpose for your tomato plants. Firstly, it can provide physical protection from larger pests such as possums and wallabies, which are common in Australia. Secondly, it can act as a support system for your tomato plants. By planting your tomatoes along the bottom of the fence, you can tie and train the branches to grow upwards, providing stability and optimal sun exposure. This method also helps create an orderly garden with an eye-catching design element.
Repellents
Natural bug repellents are an effective and safe way to protect your tomato plants from insects. You can create your own repellent sprays at home using ingredients like garlic, hot peppers, vinegar, and tomato leaves. For instance, a mixture of garlic oil and biodegradable soap can help repel whiteflies, aphids, and beetles. Alternatively, a spray made from hot pepper sauce and dish soap will deter mites. These organic sprays are an excellent way to protect your plants without resorting to chemical repellents.
Protective Netting
Garden netting is a useful tool to protect your tomato plants from pests. It acts as a physical barrier, preventing animals and insects from reaching your crops. Netting can be draped over your plants or installed as a fence or cage to provide a protected environment for your tomatoes to thrive.
Greenhouses
Constructing a greenhouse is an effective way to safeguard your tomato plants from pests. Greenhouses provide a controlled environment, allowing you to monitor and manage the conditions in which your plants grow. While this option may require a more significant investment, it offers comprehensive protection from a range of pests and weather conditions.
Collars
Tomato collars are a simple yet effective way to protect your tomato seedlings from cutworms, which are nocturnal pests that can damage or destroy young plants. Collars are placed around the base of seedlings, extending a few inches above the soil line. You can purchase ready-made collars or create your own using materials like newspaper or aluminium foil. Regularly check your collars to ensure they remain securely in place.
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Identification: take photos, look for animal tracks, inspect plant debris
If you're wondering what is eating your tomato plants at night in Australia, the first step is to identify the culprit. Here are some identification methods to try:
Take Photos
Before you clean up any mess or damage, take photos of the affected plants and the surrounding area. These photos can serve as valuable evidence for your investigative research. Look for specific details like ragged edges on leaves, 45-degree angle cuts on stalks, half-eaten tomatoes, visible chewing on leaves, or grooves in the leaves. These signs can provide clues about the type of pest you're dealing with.
Look for Animal Tracks
Inspect the area for any visible animal tracks or slime trails. Some pests, such as voles, will create tunnels or burrows, while others may leave droppings behind. Look for signs of digging or disturbances in the soil. These tracks and traces can help identify the type of animal causing the damage.
Inspect Plant Debris
Examine the plant debris below the damaged areas. Some pests, like earwigs, tend to stay close to the damage they cause. Check for insects or other small creatures hiding among the debris. Additionally, look for signs of natural predators, such as ladybugs or lacewings, which may indicate the presence of herbivorous insects.
By combining these identification methods, you can gather valuable information to determine the nocturnal visitors to your garden. This knowledge will enable you to implement effective measures to protect your tomato plants from further damage.
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Frequently asked questions
Nocturnal pests that are known to eat tomato plants include possums, snails, slugs, and insects such as hornworms, aphids, beetles, and cutworms.
Look for signs of damage such as chewed leaves, half-eaten fruits, grooves in the leaves, or slime trails. You can also set up a camera to monitor your garden at night or take photos of the damage for reference.
You can use physical barriers such as fencing or cages to keep pests out. You can also try using specific repellants that deter animals based on smell or taste, or pick the pests off the plants by hand.
