Rose Bushes Pests: Common Problems and Solutions

Rose bushes are a delight to have in any garden, but they can be prone to pests that can cause damage and ruin the beauty of your blooms. Aphids are a common problem, feeding on the sap of the rose bush and causing curled or distorted leaves.

These pesky insects can multiply quickly, so it's essential to catch them early. A strong jet of water from a hose can dislodge them, but repeated infestations may require insecticidal soap or neem oil to control.

Rose slugs, also known as sawfly larvae, can also be a problem, eating through the leaves and stems of the rose bush. They're particularly fond of the tender new growth, so keep an eye out for them in the spring.

To control rose slugs, hand-picking is a good option, or you can use a targeted insecticide to prevent them from causing further damage.

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Rose insect pests are either sap-sucking or chewing. Sap-sucking pests of Roses include Aphids, Thrips, Mites, Whitefly, and Scales.

If pest numbers get out of control, plants can weaken, become unsightly and in worse cases can cause plant death.

Chewing pests of Roses include Caterpillars, Earwigs, Garden Weevil, Sawfly Larvae (Roseslug), and Snails and Slugs.

Common Insect Pests of Plants can be a real nuisance, but it's essential to identify them to take control.

Rose insect pests are either sap-sucking or chewing.

Aphids, Thrips, Mites, Whitefly, and Scales are examples of sap-sucking pests.

Chewing pests of Roses include Caterpillars, Earwigs, Garden Weevil, Sawfly Larvae (Roseslug), and Snails and Slugs.

Some pest activity can be tolerated, but if pest numbers get out of control plants can weaken and become unsightly.

Cockroaches are one of the most common household pests. They can be found in every region of the world and thrive in almost any environment.

Their flat, oval-shaped bodies allow them to squeeze into tiny crevices and cracks, making them nearly impossible to eradicate. They are also prolific breeders, with some species able to produce up to 50 eggs at a time.

Ants are another common household pest, with over 12,000 known species worldwide. They are attracted to sweet or sticky substances, which is why you often see them near food and drink spills.

Rodents, including mice and rats, are also common pests that can cause significant damage to homes and businesses. They are attracted to food and can squeeze through tiny openings, making them difficult to detect.

If you notice any of the following signs, it's likely that your rose bush has been infested with pests.

Holes in the leaves and stems are a common sign of aphid infestation. Aphids can also leave behind a sticky, sweet-tasting substance called honeydew.

Rose bushes infested with caterpillars may have large, chewed holes in their leaves. These holes can be up to an inch in diameter and may have a frayed edge.

Spider mites can cause yellowing or bronzing of the leaves, especially on the underside. This is due to their piercing-sucking mouthparts that extract sap from the plant.

Scale insects can be found on the stems and branches of rose bushes, and can cause curling or twisting of the leaves.

Aphids can also cause curled or distorted leaves, especially on the tips of the branches. This is due to their piercing-sucking mouthparts that inject a toxin into the plant.

Caterpillars can be found on the leaves and stems of rose bushes, and can cause significant damage if left untreated. They can be up to an inch long and have a distinctive pattern of stripes or spots.

Spider mites can cause fine webbing on the leaves and stems of rose bushes, especially in the morning when the webs are still wet.

To prevent pests on roses, keep plants well watered and fed, and control weeds. This will help create a healthy environment for your roses to thrive.

A diverse garden with companion plants can also help repel aphids. Basil, catnip, rosemary, and alliums are great options to consider.

Planting trap plants like lupines, nasturtium, or sunflowers can direct aphids away from your roses. This is a clever way to manage aphid populations without using chemicals.

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To keep your roses pest-free, it's essential to keep plants well watered and fed. This will help your roses stay healthy and strong, making them less susceptible to pests.

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Attracting natural predators to your garden can also help prevent pests. You can do this by creating a diverse garden with companion plants like basil, catnip, rosemary, and alliums.

Some plants, like lupines, nasturtium, or sunflowers, are favored by aphids and can be used as trap plants to direct them away from your roses. This is a clever way to keep aphids at bay without using chemicals.

By incorporating these simple strategies into your gardening routine, you can prevent pests and keep your roses thriving.

Aphids are tiny pests that can quickly get out of hand on your roses. They feed on new tender growth in early spring, so it's essential to act fast.

One method to get rid of aphids is to use Yates Nature's Way Citrus & Ornamental Spray, which is suitable for use in organic gardens and can help control a variety of pests, including aphids, thrips, and caterpillars.

Early spring is the perfect time to spot aphids, and it's crucial to control them quickly to prevent damage.

You can also try using 7 different methods to get rid of aphids, including what NOT to do, as expert gardener Danielle Sherwood recommends. Her methods range from introducing natural predators to using insecticidal soap.

Aphids can be incredibly damaging if not quickly controlled, so it's essential to take action as soon as you spot them.

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To create a biocontrolled garden, you can use natural predators and other organisms to keep pests in check, just like nature's ancient food webs do.

Start by identifying the pests you want to control, like aphids and hornworms, and then find their natural predators. For example, ladybugs prey on aphids, making them a great addition to your garden.

Ladybugs and other beneficial insects can be attracted to your garden by planting flowers that provide nectar, such as marigolds and daisies.

You can also introduce beneficial nematodes, microscopic worms that attack and kill insect larvae, to control pests like hornworms.

By incorporating these natural predators and beneficial organisms into your garden, you can create a self-regulated ecosystem that acts like a natural food web.

Sawflies are small, dark, non-stinging wasps that feed on leaf tissue between the leaf veins of rose leaves. Their larvae are green with an orange-red head and look like butterfly or moth caterpillars, but are slimy looking.

Sawfly larvae emerge and begin feeding in early spring, and can be controlled by picking them off by hand or using a stream of water. Horticultural oil sprays and neem oil are effective low-toxicity options for controlling young sawfly larvae.

Rose slugs feed through June and are not seen again until the next spring, while the curled rose sawfly has one generation per year. The bristly rose slug has several generations throughout the summer.

Aphids are small, inconspicuous insects that feed in groups near the tips of new shoots and flower buds. They cause distortion of young leaves and stunting new growth, and can be controlled with insecticidal soap or neem oil.

Beneficial insects like lacewing and ladybird beetle larvae and adults prey on aphids, and tiny parasitic wasps lay their eggs inside aphids to control their populations. Adding and enhancing beneficial insects in your yard can be a long-term strategy for controlling aphids.

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Mites are very small and almost invisible to the naked eye, and are usually found on the underside of leaves with webbing. Two-Spotted Mites are common mite pests of Roses, and can be treated with Yates Lime Sulfur or Yates Nature's Way Citrus & Ornamental Spray.

Scale insects are immobile and covered with a waxy shell, and can be mistaken for a fungal infection. They pierce rose canes and feed on the juices, resulting in weakened plants.

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Sawfly Larvae, also known as Roseslugs, are small, green caterpillar-like insects that feed on the undersides of rose leaves, creating tan blotches and a transparent look to the leaf.

They are usually under ½ inch long, with light green bodies and tan heads, and can fully skeletonize the leaves, leaving only the veins.

To control sawfly larvae, manually remove them by plucking them off and plunging them into a jar of soapy water, or use a high-pressure spray from your hose.

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Insecticidal soap or Neem oil can be used as a last resort, but be sure to avoid spraying the rose flowers to protect bees.

Rose slugs are active mostly at night and leave behind windows of papery, translucent damage on your rose leaves that later turns brown.

They are rarely a threat to the health of the rose, but the results can be unsightly.

To control rose slugs, start looking for them on the underside of leaves in early spring, and use a hose or brush them off the plant.

Some types of rose slugs may have multiple generations in a year, so keep an eye on your roses for a reappearance later in the season.

Garden Weevils are small and brown, with long noses, and chew small holes in rose leaves.

For small infestations, remove them by hand and squish underfoot, while for larger infestations, spray with Yates Advanced Garden Insect Killer.

Earwigs chew very small holes in rose flowers and young stems.

They are usually found in dark, moist areas, and can be controlled by removing weeds and debris, and using insecticidal soap.

Fuller Rose Beetles are weevils with short snouts, and are brown with black mottled markings, about 5/8 inch long.

They chew foliage and flowers at night, and can be controlled by hand-picking at night, or using insecticides like carbaryl, Spinosad, or Pyrethrins.

Snails and Slugs are not insects, but molluscs, and are usually found on humid or wet days, chewing on soft new growth and flowers.

To control them, sprinkle and scatter Yates Snail & Slug Bait around the base of plants.

Thrips are small, pale-bodied insects with dark wings, and pierce foliage and buds of roses, causing brown edges or streaks on petals, and deformed buds.

They can be controlled by cutting off and disposing of damaged buds and foliage, and using fungus-based insecticides.

Mites are very small, and are usually found on the underside of leaves, causing speckled yellow or brown leaves.

They can be treated with Yates Lime Sulfur, or Yates Nature's Way Citrus & Ornamental Spray.

Scale Insects are immobile, waxy-covered insects that pierce rose canes and feed on the juices, weakening the plant.

They can be controlled by pruning off heavily infected canes, and using rubbing alcohol and a toothbrush or Q-tip to remove them.

Japanese beetles are a destructive landscape pest that feeds on hundreds of plant species, including roses.

They are about 7/16 inches long, with a dark metallic green front and dark tan wing covers. Five small, white patches of short hairs along each side of the dorsal abdomen are a key characteristic for identification.

Adult Japanese beetles are strong fliers and can quickly overwhelm a plant with their pheromone, which attracts other beetles to the same food source.

To control Japanese beetles, handpick them if the infestation is light. Insecticides with Permethrin, like Eight Liquid Concentrate, are also effective.

However, new beetles may replace those killed by insecticides, making it a challenging control method.

Japanese beetles have a distinctive appearance, with a metallic copper and green body and bright copper head. White hairs near their legs are another identifying feature.

To target the grubs, which overwinter and spend most of the year in the soil, apply Milky Spore, a bacterium that causes a lethal disease specific to Japanese beetle grubs.

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Removing pheromone trails, such as those left behind in rose droppings, can also help discourage Japanese beetles from feeding on your plants.

Hand-picking Japanese beetles and discarding them in a pail of soapy water is another effective control method, especially when done early in the morning when the beetles are slow and sleepy.

Birds, such as cardinals, catbirds, and grackles, are natural enemies of Japanese beetles and can be encouraged in your garden to help control the population.

Avoid using Japanese beetle traps, as they can attract more beetles to your garden with their pheromone-emitting attractant.

Rose chafers are scarab beetles that are approximately 3/8 inch long, slender, and light tan in color.

They're often found in areas with sandy soil, which makes them a common problem for gardeners in certain regions.

Adult rose chafers feed on rose flowers and foliage, while their larvae feed on the roots of grasses, alfalfa, or clover sod.

Inspect your plants regularly for signs of infestation, such as skeletonized leaves and adult beetles.

Handpicking is a good option for light infestations, but be aware that these beetles are quite mobile and strong fliers, making them difficult to control with insecticides alone.

Insecticides like carbaryl (Sevin), Spinosad (Capt'n Jack's), and Permethrin (Eight) can help control rose chafers, but be sure to avoid spraying the flowers to protect the bees.

Aphids are small, soft-bodied insects that cluster around the soft new growth on your roses, feeding by piercing the plant and sucking its sugary juices.

They're often the first pest to make an appearance in early spring, and you'll spot them as groups of light green, pear-shaped insects huddled together on your rosebush.

Aphid infestations are easy to spot, with curled leaves, disfigured buds, or a sticky, black substance on the foliage.

You'll also see a clear, shiny, sticky waste product called honeydew that collects on the leaves below the aphids and attracts ants.

Aphids are vectors for diseases and can be dangerous to plants, so it's essential to control their populations.

Look for beneficial insects where you see aphids, such as lacewing and ladybird beetle larvae and adults, which are naturally occurring predators of aphids.

Tiny parasitic wasps also control aphids by laying their eggs inside the aphids, killing them and leaving behind mummies.

Aphid populations can increase rapidly, but biological insecticides like insecticidal soap are very effective on aphids and have low toxicity.

Insecticidal soaps must contact the aphids directly, and you can also use Neem oil, Spinosad, or Pyrethrins to control aphid populations.

A long-term strategy is to add and enhance beneficial insects in your yard, such as ladybird beetles or lacewings, which feed on aphids as a natural food source.

Aphid infestations usually go away on their own within a couple of weeks via control from their natural predators, but if you want to get rid of them sooner, there are several methods you can try.

The rose midge is a tiny fly that lays its eggs in the buds and shoots of roses. The larvae that hatch from these eggs are small whitish maggots about 1/16 inch in length.

Feeding by the larvae causes bent, misshapen, or blasted buds and withering stem tips. Flower buds and growing shoots turn brown and finally black.

Look for the small whitish larvae between the petals and sepals at the base of the flower bud to verify the presence of midge larvae. A magnifying lens can help you spot them.

Prune out infested buds to remove the larvae and reduce the number of midges available to reinfest the plants. This can be an effective control method.

Chemical control may be needed for persistent problems, and systemic insecticides like acephate (Orthene) and dimethoate (Cygon-2E) can be effective.

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Gall Wasps are tiny, non-stinging wasps that cause abnormal plant growths on roses and other plants.

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These growths, called galls, can be specific to the species of gall maker and may look like mossy spheres or round balls with pink spines.

Insect larvae develop inside the gall, and stem galls can damage plants above the location of the gall.

Numerous galls can stress the plant, using up nutrients that would otherwise be used for growth.

Galls are purely cosmetic and not a danger to the plant, but they can be unsightly.

To control gall wasps, prune out galls before the wasps have matured and emerged from the gall.

This is best done in the fall, after the leaves drop, by cutting below the gall and above a bud.

For leaf galls, pick up fallen leaves to prevent the wasps from emerging.

Removing galls from the garden may not totally eliminate future problems if adult wasps fly in from nearby areas.

The rose stem girdler larva feeds just beneath the bark of rose stems, causing the stem above the feeding area to die.

The larva's feeding prevents water and nutrient flow in the stem, leading to a swollen area just below the dead area.

Adult rose stem girdler beetles are rarely seen, but they're about 3/8 inch long and have a flattened body shape.

Effective chemical control is difficult and not recommended for rose stem girdler infestations.

To control the pest, prune out the affected stem below the injury and above a bud, and dispose of the pruned canes to remove the insects from the garden.

Leafcutter bees are actually beneficial native pollinators, so it's worth considering leaving them alone.

They cause identifiable damage to rose leaves, with smooth-edged and circular holes.

These bees aren't feeding on the leaves, but rather using the cuttings to line their nests, often in rotting wood.

Their activity is brief, so they're not a long-term nuisance.

Any product you try to apply to them will also affect beneficial insects.

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Other animals can be a real nuisance for rose gardeners. Deer, Lizards, and Rabbits are all known to feed on roses.

Deer are particularly fond of rose leaves and flowers, and can cause significant damage to a garden in a short amount of time.

Rabbits, on the other hand, tend to prefer the tender shoots and stems of young rose plants.

Lizards, while not typically a major pest, can still cause problems by eating the buds and flowers of roses.

Black Spot is a common issue for rose plant owners. It's caused by fungal diseases that mostly attack rose leaves.

Leaves develop black irregular spots, which can be unsightly and weaken the plant. The spots can eventually turn yellow and drop, leaving the plant looking bare.

To treat Black Spot, you can spray your rose plants with Yates Rose Gun or Yates Rose Shield Concentrate. These products can help prevent the spread of the disease and promote healthy growth.

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Downy Mildew is a fungal disease that mostly attacks Rose leaves and sometimes stems.

The upper surface of leaves develop purple to brown irregular spots, and the underside can develop a grey and fuzzy growth.

To treat, spray with Yates Liquid Copper.

Canker can be a real problem for gardeners, but there's good news: it's preventable with the right techniques.

Rose Canker, or Rose Dieback, is a fungal disease that causes stems and branches to die back from pruned ends.

Pruning is a major contributor to the spread of Rose Canker, so using sharp and clean pruning tools is essential.

If you're pruning a plant known to have Rose Canker, disinfect your secateurs in between each cut with a 9:1 mixture of water and bleach.

Keeping plants well-fed will help promote disease resistance and resiliency, making them less susceptible to Canker.

Budworms are a type of caterpillar that can wreak havoc on your rose blooms. They range in size from .5 to 2 inches long and come in a variety of colors including light green, brown, and pinkish.

Budworms are most active at dusk and at night, which is why it's essential to check your roses during this time. They eat oval-shaped holes in your blooms or devour them completely.

If you spot budworms, they'll likely look like small green caterpillars with striped sides and brown heads. They also leave behind globs of black droppings on damaged petals.

Encouraging biodiversity in your garden is a great way to keep budworms in check. Planting a variety of plants in mixed borders, rather than isolating your roses, makes infestation less likely and attracts natural predators.

Handpicking budworms when you see them, ideally at dusk, and removing infested buds promptly can help control the problem. For potted roses, changing the soil can help remove grubs.

Spraying a Bt product designed for caterpillars, like Monterey Bt, directly on active, feeding adults can also help control budworm populations.

To get rid of aphids on your rose bushes, start by giving them a strong, direct spray from your hose to knock the aphids to the ground.

Make sure to get the undersides of leaves as well, as aphids often hide there.

If the infestation is too severe, consider using an insecticidal soap, but use it with caution to prevent harm to beneficial bugs.