[From the UC IPM blog Pests in the Urban Landscape]
1. Aphids
These insects may be small, but they can quickly build up large populations. With many different species in California that feed on vegetables, flowers, fruit trees, and woody ornamentals, aphids are a common sight in landscapes and gardens. Year after year, aphids continue to hold the top spot. Learn more about aphids and their management in Pest Notes: Aphids.
2. Fungus Gnats
3. Thrips
Another tiny insect sometimes found on houseplants, thrips are slender insects about the size and shape of a dash printed in a newspaper. They suck out the cell contents, leaving a discolored speckling on leaves or stunting plant growth. For more about thrips monitoring and management, visit our Pest Notes: Thrips.
4. Mealybugs
If you've found soft, oval insects that are white in color with wax filaments on your indoor or outdoor plants, it is likely you have mealybugs. These wingless insects are often found in clustered colonies. In yards and gardens, handpicking, pruning, or high-pressure water sprays can reduce populations. For small infestations indoors, spot treatments may help reduce populations. For houseplants with severe infestations, consider disposing of the plant. Find additional information in Pest Notes: Mealybugs.
5. Carpet Beetles
6. Peach Leaf Curl
Peach leaf curl can affect the blossoms, fruit, leaves, and shoots of peach and nectarine trees. The symptoms of the disease first appear in spring, when distorted red foliage emerges. However, focus management for nonresistant varieties in the late fall and early winter, after leaves drop. Read more about this disease in our Pest Notes: Peach Leaf Curl.
7. Clothes Moths
New to the top ten list this year were clothes moths. These pests tend to hide when disturbed, so you may not realize you have an infestation until after the moths have already damaged fabric, fur, or feathered items. Some clothes moths make webs while others are casemaking moths. Regularly monitoring and cleaning clothing and storage areas can help prevent or reduce infestations. Find more identification and management information from Pest Notes: Clothes Moths.
8. Springtails
9. Whiteflies
Whiteflies are not actual flies but are tiny insects that are often found on the underside of leaves, feeding on the phloem of many different plants. Certain species can cause significant loss in vegetable gardens; other species found in fruit trees are less damaging. Both adult and immature whiteflies also attack houseplants. Management information can be found in Pest Notes: Whiteflies.
10. Scales
Scales are small, legless insects that look like tiny scabs on the stems, leaves, or fruit of plants. While some scale species can weaken a plant when abundant, other species do not appear to damage plants at all. Think you have a problem with these insects? Visit our Pest Notes: Scales for identification and management options.
/h3>/h3>/h3>/h3>/h3>/h3>/h3>/h3>/h3>/h3>We all encounter pests in our homes, gardens, and landscapes, but which ones are most popular in California? While we can't say for certain, website traffic to UC IPM's Pest Notes gives us a glimpse of popular pests. Here are the top ten most frequently viewed publications in 2021.
1. Aphids
These insects may be small, but they can quickly build up large populations. With many different species in California that feed on vegetables, flowers, fruit trees, and woody ornamentals, aphids are a common sight in landscapes and gardens. Year after year, aphids continue to hold the top spot. Learn more about aphids and their management in Pest Notes: Aphids.
2. Fungus Gnats
This pest has become more popular in recent years, perhaps a result from growing numbers of houseplant enthusiasts. Fungus gnats are small flies that often infest soil and potting mix. They can be a common houseplant problem with larvae, or immatures, damaging roots and stunting plant growth when present in large numbers. More information on these frustrating flies can be found in our Pest Notes: Fungus Gnats.
3. Thrips
Another tiny insect sometimes found on houseplants, thrips are slender insects about the size and shape of a dash printed in a newspaper. They suck out the cell contents, leaving a discolored speckling on leaves or stunting plant growth. For more about thrips monitoring and management, visit our Pest Notes: Thrips.
4. Mealybugs
If you've found soft, oval insects that are white in color with wax filaments on your indoor or outdoor plants, it is likely you have mealybugs. These wingless insects are often found in clustered colonies. In yards and gardens, handpicking, pruning, or high-pressure water sprays can reduce populations. For small infestations indoors, spot treatments may help reduce populations. For houseplants with severe infestations, consider disposing of the plant. Find additional information in Pest Notes: Mealybugs.
5. Carpet Beetles
Immature carpet beetles feed on natural fibers such as wool, silk, or furs. The adults may be brought into the home on cut flowers or when they fly in through open doors, windows, or holes in screens. Regular cleaning of rugs, upholstered furniture and can prevent infestations or reduce damage. Check out the Pest Notes: Carpet Beetles for more information.
6. Peach Leaf Curl
Peach leaf curl can affect the blossoms, fruit, leaves, and shoots of peach and nectarine trees. The symptoms of the disease first appear in spring, when distorted red foliage emerges. However, focus management for nonresistant varieties in the late fall and early winter, after leaves drop. Read more about this disease in our Pest Notes: Peach Leaf Curl.
7. Clothes Moths
New to the top ten list this year were clothes moths. These pests tend to hide when disturbed, so you may not realize you have an infestation until after the moths have already damaged fabric, fur, or feathered items. Some clothes moths make webs while others are casemaking moths. Regularly monitoring and cleaning clothing and storage areas can help prevent or reduce infestations. Find more identification and management information from Pest Notes: Clothes Moths.
8. Springtails
Springtails made an unexpected appearance on this year's top ten list. These are small, jumping insects that can be found near kitchen sicks and bathtubs as well as in the soil of indoor houseplants. They often appear in the spring and early summer but can be found year-round in moist environments. They get their name because they jump when disturbed. Learn more about this pest in Pest Notes: Springtails.
9. Whiteflies
Whiteflies are not actual flies but are tiny insects that are often found on the underside of leaves, feeding on the phloem of many different plants. Certain species can cause significant loss in vegetable gardens; other species found in fruit trees are less damaging. Both adult and immature whiteflies also attack houseplants. Management information can be found in Pest Notes: Whiteflies.
10. Scales
Scales are small, legless insects that look like tiny scabs on the stems, leaves, or fruit of plants. While some scale species can weaken a plant when abundant, other species do not appear to damage plants at all. Think you have a problem with these insects? Visit our Pest Notes: Scales for identification and management options.
/h2>/h2>/h2>/h2>/h2>/h2>/h2>/h2>/h2>/h2>
[From UC IPM's Pests in the Urban Landscape Blog]
At some point, all of us encounter a pest in our home, garden, or landscape. But you're not alone! UC IPM publishes Pest Notes – a series of more than 150 papers reviewed by experts in the field – to provide science-based information about pests and their management.
These ten Pest Notes were the most frequently viewed online in 2019, with more than 330,000 total pageviews. While it's not a contest, we like to think these are the winners of 2019's most popular pests.
1. Aphids
These small, soft-bodied insects can multiply rapidly, especially in warm weather. Many species exist in California, feeding on vegetables,flowers, fruit trees, and woody ornamentals. Their sticky honeydew encourages growth of sooty mold, while their feeding can distort growth or transmit viruses from plant to plant. Managing ants and supporting natural enemies are two ways you can reduce aphid damage. Learn more about aphids and their manaent in the Pest Notes: Aphids.
2. Thrips
Thrips are tiny, slender insects about the size and shape of a dash printed in a newspaper. Some are beneficial predators that feed on other insects and mites. But most feed on plants, sucking out the cell contents, leaving a discolored speckling on leaves or stunting plant growth. An integrated approach is recommended for management, incorporating good cultural practices, natural enemies, and least-toxic insecticides if needed. For more about thrips monitoring and management, visit our Pest Notes: Thrips.
Peach leaf curl can affect the blossoms, fruit, leaves, and shoots of peach and nectarine trees. The symptoms of the disease first appear in spring, when distorted red foliage emerges. However, focus management for nonresistant varieties in the late fall and early winter, after leaves drop. Read more about this disease in our Pest Notes: Peach Leaf Curl.
4. Scales
Scales are small, legless insects that look like tiny scabs on the stems, leaves, or fruit of plants. While some scale species can weaken a plant when abundant, other species do not appear to damage plants at all. Think you have a problem with these insects? Visit our Pest Notes: Scales for identification and management options.
5. Fungus Gnats
This pest was surprising to find in this year's top 10. Fungus gnats are small flies that often infest soil and potting mixing, emerging from indoor houseplants and becoming a nuisance. The larvae, or immatures, can damage roots and stunt plant growth when present in large numbers. If you do see these flies flitting about, sticky traps may be effective in reducing the problem. However, the presence of gnats and decline of house plants are more commonly due to too much or too little water and improper soil conditions. More information on these frustrating flies can be found in our Pest Notes: Fungus Gnats.
6. Mealybugs
If you've found soft, oval insects that are white in color with wax filaments on your plants, it is likely you have mealybugs. These wingless insects are often found in clustered colonies on indoor and outdoor plants. In yards and gardens, handpicking, pruning, or high-pressure water sprays can reduce populations. For small infestations indoors, spot treatments may help reduce populations. For houseplants with severe infestations, consider disposing of the plant. Find additional information in Pest Notes: Mealybugs.
In residential areas, this not so mysterious marsupial will take up residence under porches, decks, garden sheds, attics, and basements. Opossums are nocturnal omnivores, foraging for fruits, nuts, plants, insects, snails, and even small mammals such as mice. In addition to being a nuisance in residential areas, they carry various diseases that can be transmitted to humans including tuberculosis, spotted fever, and typhus. The best control for opossums is to screen or block access to areas where they may den. You may also choose to hire a professional wildlife control operator to trap and dispense of any opossum visitors. Pest Notes: Opossum has more on the biology and management of these animals.
8. Carpet Beetles
Carpet beetle adults are typically brought into the home on cut flowers or when they fly in through open doors, windows, or holes in screens. The immature beetles feed on animal products such as wool, silk, leather, fur, and hair. Regular cleaning of rugs, upholstered furniture and closets as well as eliminating accumulations of lint, hair, and other debris is an important preventive measure. Check out the Pest Notes: Carpet Beetles for more preventive and management methods of these pests.
9. Ground Squirrels
Ground squirrels are troublesome rodents found throughout most of California. Their network of burrows can be extensive, damaging trees, lawns, and structures. Ground squirrels can also damage many food-bearing and ornamental plants in yards and gardens. For legal management methods, see our Pest Notes: Ground Squirrels.
10. Whiteflies
Whiteflies are not actual flies but are tiny insects that are often found on the underside of leaves, feeding on the phloem of many different plants. Certain species can cause significant loss in vegetable gardens; other species found in fruit trees are less damaging. In home gardens, reflective mulch can repel whiteflies and yellow sticky traps can reduce numbers of high infestations. Additional management information can be found in Pest Notes: Whiteflies.
/span>- Author: Elaine Lander
At some point, all of us encounter a pest in our home, garden, or landscape. But you're not alone! UC IPM publishes Pest Notes – a series of more than 150 papers reviewed by experts in the field – to provide science-based information about pests and their management.
These ten Pest Notes were the most frequently viewed online in 2019, with more than 330,000 total pageviews. While it's not a contest, we like to think these are the winners of 2019's most popular pests.
1. Aphids
These small, soft-bodied insects can multiply rapidly, especially in warm weather. Many species exist in California, feeding on vegetables, flowers, fruit trees, and woody ornamentals. Their sticky honeydew encourages growth of sooty mold, while their feeding can distort growth or transmit viruses from plant to plant. Managing ants and supporting natural enemies are two ways you can reduce aphid damage. Learn more about aphids and their management in the Pest Notes: Aphids.
2. Thrips
Thrips are tiny, slender insects about the size and shape of a dash printed in a newspaper. Some are beneficial predators that feed on other insects and mites. But most feed on plants, sucking out the cell contents, leaving a discolored speckling on leaves or stunting plant growth. An integrated approach is recommended for management, incorporating good cultural practices, natural enemies, and least-toxic insecticides if needed. For more about thrips monitoring and management, visit our Pest Notes: Thrips.
3. Peach Leaf Curl
Peach leaf curl can affect the blossoms, fruit, leaves, and shoots of peach and nectarine trees. The symptoms of the disease first appear in spring, when distorted red foliage emerges. However, focus management for nonresistant varieties in the late fall and early winter, after leaves drop. Read more about this disease in our Pest Notes: Peach Leaf Curl.
4. Scales
Scales are small, legless insects that look like tiny scabs on the stems, leaves, or fruit of plants. While some scale species can weaken a plant when abundant, other species do not appear to damage plants at all. Think you have a problem with these insects? Visit our Pest Notes: Scales for identification and management options.
5. Fungus Gnats
This pest was surprising to find in this year's top 10. Fungus gnats are small flies that often infest soil and potting mixing, emerging from indoor houseplants and becoming a nuisance. The larvae, or immatures, can damage roots and stunt plant growth when present in large numbers. If you do see these flies flitting about, sticky traps may be effective in reducing the problem. However, the presence of gnats and decline of house plants are more commonly due to too much or too little water and improper soil conditions. More information on these frustrating flies can be found in our Pest Notes: Fungus Gnats.
6. Mealybugs
If you've found soft, oval insects that are white in color with wax filaments on your plants, it is likely you have mealybugs. These wingless insects are often found in clustered colonies on indoor and outdoor plants. In yards and gardens, handpicking, pruning, or high-pressure water sprays can reduce populations. For small infestations indoors, spot treatments may help reduce populations. For houseplants with severe infestations, consider disposing of the plant. Find additional information in Pest Notes: Mealybugs.
7. Opossum
In residential areas, this not so mysterious marsupial will take up residence under porches, decks, garden sheds, attics, and basements. Opossums are nocturnal omnivores, foraging for fruits, nuts, plants, insects, snails, and even small mammals such as mice. In addition to being a nuisance in residential areas, they carry various diseases that can be transmitted to humans including tuberculosis, spotted fever, and typhus. The best control for opossums is to screen or block access to areas where they may den. You may also choose to hire a professional wildlife control operator to trap and dispense of any opossum visitors. Pest Notes: Opossum has more on the biology and management of these animals.
8. Carpet Beetles
Carpet beetle adults are typically brought into the home on cut flowers or when they fly in through open doors, windows, or holes in screens. The immature beetles feed on animal products such as wool, silk, leather, fur, and hair. Regular cleaning of rugs, upholstered furniture and closets as well as eliminating accumulations of lint, hair, and other debris is an important preventive measure. Check out the Pest Notes: Carpet Beetles for more preventive and management methods of these pests.
9. Ground Squirrels
Ground squirrels are troublesome rodents found throughout most of California. Their network of burrows can be extensive, damaging trees, lawns, and structures. Ground squirrels can also damage many food-bearing and ornamental plants in yards and gardens. For legal management methods, see our Pest Notes: Ground Squirrels.
10. Whiteflies
Whiteflies are not actual flies but are tiny insects that are often found on the underside of leaves, feeding on the phloem of many different plants. Certain species can cause significant loss in vegetable gardens; other species found in fruit trees are less damaging. In home gardens, reflective mulch can repel whiteflies and yellow sticky traps can reduce numbers of high infestations. Additional management information can be found in Pest Notes: Whiteflies.
/h2>/h2>/h2>/h2>/h2>/h2>/h2>/h2>/h2>/h2>/h2>/div>
- Author: Anne Schellman
- Author: Karey Windbiel-Rojas
Pests have popularity contests too. We recently looked at how many visits our popular Pest Notes publication series received in 2017.
If you aren't familiar, the UC IPM Pest Notes series are science-based publications written and reviewed by experts on specific pest or management topics for California. UC IPM has 169 Pest Notes with some being more popular than others.
Here are the 20 most visited titles in 2017:
1- Carpet Beetles
2- Peach Leaf Curl
Backyard peach and nectarine trees often suffer from peach leaf curl, a common fungal disease in California. The disease causes curling and deformation of peach and nectarine leaves and if left uncontrolled for multiple years, the tree may eventually die. Read more about it in the Pest Notes: Peach Leaf Curl.
3- Aphids
Warm weather means populations of aphids continue to live and breed, and you may be seeing these insects on your roses and other plants already this season. Learn about their fascinating life cycle and best management tactics at Pest Notes: Aphids.
4- Clothes Moths
The larvae of this moth attacks wool clothing, carpets, rugs, upholstered furniture, furs, and much more. If you think you might have this pest, consult the Pest Notes: Clothes Moths for help.
5- Scales
Many people overlook scales on their plants because they don't look like normal insects. Scales have strawlike mouthparts and suck juices from plants, sometimes leading to damage. Learn about the many different types of scales, host plants, and how to manage them at Pest Notes: Scales.
6- Thrips
7- Spider Mites
Spider mites thrive during dry, dusty conditions and usually escape detection until large populations build up and create copious webbing that covers plants. Luckily, there are natural enemies of spider mites that help keep their populations in check, including the western predatory mite. Learn management techniques at Pest Notes: Spider Mites.
8- Whiteflies
Whiteflies are small, flying insects that can attack a number of garden and landscape plants. They usually occur in groups on the undersides of plant leaves and excrete a sticky honeydew that may be covered with sooty mold. Find out more about this garden pest at Pest Notes: Whiteflies.
9- Fire Blight
In spring, some fruit tree shoots may appear burnt, a symptom of fire blight. This disease causes flowers, shoots, and young fruit to shrivel and turn black. Some trees are more susceptible to fire blight. Read about this disease in the Pest Notes: Fire Blight.
10- Fungus gnats
11- Leaffooted Bug
Leaffooted bugs are not new to California, but recently some areas have seen an increase in their presence and feeding damage. Learn more about this odd-looking bug and what it eats in Pest Notes: Leaffooted Bug.
12- Rats
Rats in your home and garden are destructive and can transmit disease. If you suspect the presence of rats, you'll first need to determine which of the two species (Norway rat or the roof rat) you have in order to effectively manage them. Find out by reading Pest Notes: Rats.
13- Ground Squirrel
14- Widow Spiders
Many people are afraid of black widow spiders and any spider that resembles them. Some spiders that look like black widows are actually harmless or less venomous relatives. Learn how to differentiate between them by reading the Pest Notes: Widow Spiders and Their Relatives.
15- Bed Bugs
Reports of bed bugs have been on the rise for the past few years. They are blood-sucking creatures that inspire revulsion in most people. If you travel, you'll want to know what bed bugs look like and how to avoid bringing them home with you. Read the Pest Notes: Bed Bugs and watch the related videos on this topic.
16- Bark Beetles
Bark beetles are small, about the size of a grain of rice, but in large numbers their larvae can do significant damage when they mine galleries just beneath the outer bark of trees. To learn more about bark beetles and their impact, visit the Pest Notes: Bark Beetles.
17- Pocket Gophers
You spot fresh mounds of soil in your garden or landscape. Could it be gophers? These small mammals can cause a lot of damage in a very short time when they feed on numerous plants, or when they gnaw on plastic water lines and sprinkler systems. Find out how to tell if it's a gopher mound and learn management tactics by reading the Pest Notes: Pocket Gophers.
18- Soil Solarization
Gardeners looking for a nonchemical way to control pathogens, nematodes, and weed seeds and seedlings may want to try soil solarization. This method is best done during the hot summer months. Learn how to use this technique by consulting the Pest Notes: Soil Solarization for Gardens & Landscapes.
19- Honey Bee Swarms
At times, large populations of between 5,000 to 20,000 honey bees can be found swarming around an urban area or a hive after taking up residence in your house. A swarm can be frightening but with correct management, it can be taken care of safely with the hive being saved. Learn how to get proper help by reading the Pest Notes: Removing Honey Bee Swarms and Established Hives.
20- Lyme Disease
Lyme disease can be transmitted to humans and pets from the bite of an infected western blacklegged tick. It can cause flulike symptoms that left untreated, may progress to arthritic, neurologic, or cardiac problems. Learn more about Lyme disease and how to safely remove a tick, and where to take a tick sample by reading the Pest Notes: Lyme Disease in California.