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Posts Tagged: Pests
Citrus Care in the Sharing Season - Help Prevent the Spread of Asian Citrus Psyllid (ACP)
As gardeners, we're often generous with our garden's bounty. From sharing seeds and plant trimmings to the joy of gifting homegrown fruit and vegetables, gardening is as much about community as it is about growing plants. However, in this season of sharing, we must also remember our responsibility to prevent the spread of pests and invasive species to protect California's diverse ecosystem.
First detected in California in 2008, Asian citrus psyllid (ACP) has been a concern for both commercial citrus growers and home gardeners. ACP poses a significant threat to California's citrus trees, capable of spreading the deadly huanglongbing (HLB) disease, an incurable condition that eventually kills the tree.
Detecting ACP involves looking for a few key characteristics. ACP is a tiny, mottled brown insect about the size of an aphid. Adults are typically 3 to 4 millimeters long and are identified by their distinctive body shape, where the head is narrower than the body, and they hold their wings tent-like over their bodies. They are most active during warm temperatures, and you might notice them jumping or flying when disturbed. The nymphs, the immature form of the psyllid, are yellowish-orange and secrete white, waxy tubules from the back of their abdomen.
Additionally, ACP leaves telltale signs on citrus leaves, such as twisted or curled new leaf growth. They are sap-feeders, like aphids and mealybugs, so they produce honeydew which leads to the growth of sooty mold. Regularly inspecting your citrus trees, especially the new growth, is key to early detection of ACP.
Recent updates to the USDA's Plant Protection and Quarantine citrus map highlights areas that are generally infested with ACP and those which are not. This distinction is crucial for understanding the regulations and eradication efforts in different regions across the state. To find detailed quarantine information by county or zones, visit the California Department of Food and Agriculture (CDFA) ACP Regulation and Quarantine Boundaries website and maps.
Looking at the map pictured above, areas in the southern region of California, south of the Grapevine or San Gabriel and Tehachapi Mountain Ranges, and as far up the coast as Santa Barbara County are considered generally infested. The CDFA does not carry out eradication efforts for ACP in these areas. In areas north of the Grapevine, an ACP detection on a residential citrus tree would trigger an eradication response from the CDFA.
As we approach the holiday season, a popular time for gardeners to share budwood for grafting, it's crucial to understand the importance of not moving citrus planting material between quarantine areas. It is especially important not to move budwood or citrus from Southern California or the Bay Area into California's Central Valley.
To aid in this effort, UC Master Gardener Program resources are available to help educate you about identifying ACP and understanding the quarantine regulations. Here are some key actions you can take:
- Only purchase new citrus trees from reputable nurseries.
- Do not accept tree cuttings or budwood from friends or family.
- After pruning or removing a citrus tree, dry out the green waste or double bag it to help ensure the green waste is disposed of appropriately.
- Control ants in and near citrus trees with bait stations. Scientists have released natural enemies of ACP in Southern California to help keep the pest in check, but ants aid ACP in evading the natural enemies.
The UC Agriculture and Natural Resources ACP website offers an interactive map tool, biological control efforts, and an online calculator for the potential costs of using insecticides. Additionally, the Statewide UC Integrated Pest Management website provides free online training for gardeners and detailed Pest Notes on ACP and HLB disease. Remember, inspecting your citrus trees is vital to prevent the spread of ACP and HLB. If you suspect an infestation, contact the CDFA Exotic Pest Hotline at 1 (800) 491-1899 or your local county agricultural commissioner.
Let's continue to share the bounties of our gardens, but let's do so responsibly, keeping our citrus trees safe and healthy. Together, we can make a difference in the fight against ACP and HLB.
Vegetable Pest Management Training Series a Success
It may seem odd to see seventy-five people at a hotel conference center learning about insects and rats on vegetables, but not if you are a UC Master Gardener. The UC Statewide Integrated Pest Management Program (UC IPM) in partnership with the UC Master Gardener Program just wrapped up the Vegetable Pests and Solutions train-the-trainer series. More than 340 UC Master Gardener volunteers from across the state took part in the regional trainings offered in Fresno, Orange, Placer, San Luis Obispo and Sonoma counties.
Active Learning
The advanced UC IPM training offered a hands-on, train-the-trainer experience that increased participants' knowledge of insect pests of vegetables, vegetable plant diseases and disorders, and vertebrate pests of gardens and homes. One of the highlights of the training was Human-Wildlife Interaction Advisor, Niamh Quinn, showing a taxidermy collection of vertebrate pests at the Orange and San Luis Obispo County workshops. Being able to handle and observe the different markings, colors and claws on certain animals makes future identification easier as participants learned the signs to look for when identifying vertebrate pest damage in the vegetable garden.
UC Master Gardener volunteers were lead through exercises that mimic questions commonly received from the public. Some of the questions had a photo, others just a sparse description that volunteers worked together to solve using online IPM resources and materials provided at the training. The exercises were designed to challenge and expose the learner to different types of scenarios and tools they can use in the future.
Outreach and Education
The UC Master Gardener Program's mission is to extend research-based information, by attending advanced trainings such as this, volunteers are even more prepared to contribute to the program's mission. With exposure and practice using new resources and materials training attendees have the tools and knowledge needed to educate the public on vegetable pests and solutions including scripted PowerPoints, activities, handouts, and vegetable pest identification card sets. One attendee reported “As a first year UC Master Gardener, this training helped me become more comfortable and more confident researching answers for pest management questions.”
At the conclusion of the training volunteers convened with their fellow county volunteers to talk about their plans to take new found knowledge back into their communities. Some of the great ideas generated were:
- offer seasonal pest problems workshops
- include a “Need Help Solving Pest Problems?” flier for all events
- add IPM tips to newsletters and social media
- integrate IPM into presentations as appropriate or relevant to topic
- add signage for damaged or diseased plants with IPM solutions in demonstration gardens
- share IPM toolkit at farmers markets and demo garden events
How We are Making a Difference
One portion of the agenda was focused on how the UC Master Gardener community is making a difference. With 6,000+ volunteers serving more than 517,000 Californians per year the impact of the UC Master Gardener volunteer effort is truly amazing. Through statewide program evaluation efforts the impact in sustainable landscaping, food gardening and community well-being is now being analyzed and reported in the programs annual report. Volunteers can see the impact they are having statewide and be proud of being part of a group that social changes they are seeing in their local communities.
As active volunteers and life-long learners UC Master Gardeners are a powerful educational tool and inspiration for others not only in the garden but in the volunteer community. Statewide educational offerings like UC IPM's train-the-trainer series help hone the diagnostics skills while building confidence in the subject matter.
The next statewide training opportunity for UC Master Gardener volunteers will be the 2020 UC Master Gardener Conference, Sept. 28 –Oct. 2, 2020 at the Granlibakken, Tahoe. The conference is the beginning planning stages and taking speaker and topic suggestions, click here to suggest a speaker or topic.
UC Master Gardener volunteers know household pests!
It's well known that the UC Master Gardener Program produces dedicated volunteers who are extremely knowledgeable about home horticulture and gardening. UC Master Gardener volunteers; especially those working at help desks, hotlines, and farmers markets, respond to thousands of requests each year, extending information and resources to California's residents that help them maintain landscapes, grow healthy food, and manage pests using the principles of integrated pest management (IPM).
Pests don't disappear at the front door, however: there are plenty of significant pests threatening our households, structures, and communities. In fact, residents in urban counties may have more need for information and resources associated with household pest IPM than for landscape and garden IPM. Even rural counties are filled with homes that may be infested by key urban pests such as ants, cockroaches, bed bugs, flies, termites, pantry pests, and rodents.
UC Master Gardener Programs have seen increasing numbers and rates of requests for information about these pests. Using the principles of IPM, household pests can be effectively managed while minimizing negative impacts to our communities and the environment. For instance, many unnecessary pesticide applications are made in urban environments, leading to pesticide exposure events, pesticide resistance issues, and environmental contamination, especially of urban surface water systems. In many cases, pests could have been managed using preventive or nonchemical tactics.
Whether in the home or in the garden, IPM is one of the key knowledge areas in which UC Master Gardener volunteers receive training. Using the UC IPM website and its materials, such as Pest Notes and Quick Tips, UC Master Gardeners are able to help answer household pest requests. Even so, volunteers familiar with plant ecosystems may not always feel confident when addressing pest problems in the home. Luckily, an advanced training opportunity exists for UC Master Gardener volunteers who would like to increase their proficiency in household IPM.
A continuing education module, entitled Advanced IPM Training for UC Master Gardeners: Household Pests, was developed by Dr. Andrew Sutherland, Urban IPM Advisor in the San Francisco Bay Area. This advanced training has been provided several times for UC Master Gardeners at in-person hands-on workshops, but it is also available online within UC IPM's IPM Resources for UC Master Gardeners web portal.
The module includes a PowerPoint presentation, word-for-word script, instructions on hands-on exercises associated with the presentation, and handouts providing detailed information about the pests covered. Help Desk leaders and other UC Master Gardener volunteers can use these materials to deliver the modules to other volunteers using a train-the-trainer model. The module can also be delivered to residential clientele directly. Pests discussed include: ants, bed bugs, cockroaches, pantry pests, termites, and other wood-destroying insects.
We encourage you to take advantage of this unique training opportunity, and become a local expert on household pests. As always, UC ANR Advisors like Dr. Sutherland are available to answer difficult questions and to provide more in-depth training, but this module can certainly help you build confidence and prepare you for that next bed bug request (you know it's coming!).
The updated continuing education module can be found at the following URL: http://ipm.ucanr.edu/FAQ/mghousehold.html
For questions about this Household Pests module, please contact Dr. Andrew Sutherland
Little Less Conversation, Little More Action (Please)
I saw Elvis today.
PlantRight defines “actionable awareness” as what happens when individuals and businesses are made aware of an opportunity to be part of the solution to California's costly (economically and environmentally) invasive garden plant problem, and make a conscious decision to act. Invasive plants (despite the fact that many are deceptively beautiful and drought resistant) outcompete native plants, alter soil chemistry, increase wildfire risk, clog our waterways and can severely compromise agricultural yields and real estate value. If that weren't enough, invasive species are the second greatest threat to biodiversity after human development.
Awareness of these facts alone will not fix any of these issues; however, add action to the mix and you have a proven formula for problem solving. PlantRight's idea of problem solving is collaborating with the industry to voluntarily phase invasive plants out of the supply chain and replace them with high-quality (i.e. non-invasive) plants. Voila! Together we prevent new invasive garden plants from wreaking havoc on our wild lands and taxpayer wallets.
The fact that 50% of California's invasive plants are of horticultural origin (Bell et al. 2007) is a source of both conversation and dismay. Yet from PlantRight's perspective this 50% is a great source of optimism because it's proof of a huge opportunity the nursery industry can play in preventing future invasive plant introductions. In past decades ornamental plant breeders and growers had little or no ability to predict a plant's invasive risk in a given region, and most invasions were well-intentioned accidents. Lucky for us we finally have science-based plant risk evaluation tools to prevent new invasive plant introductions. Not so lucky for us is that popular plants travel, and a delightful Dr. Jekyll plant in one region, may become a hideous Mr. Hyde plant and landscape transformer in a different region. It's about the right plant in the right place, but just where to begin, if we're to turn this talk into actionable awareness?
In the beginning there was lots of conversation and lots of listening sessions that Sustainable Conservation conducted with a diverse group of nursery industry stakeholders, from large ornamental growers, retail nurseries, plant scientists, trade associations and government agencies. University of California Agriculture and Natural Resources (UC ANR) has been part of this group from the start, providing academic expertise on weeds and calculating their risk. This group's official moniker is “California Horticultural Invasive Prevention,” but we prefer Cal-HIP.
With a couple years of listening and learning under our belts, and funding from Sustainable Conservation, the PlantRight program was ready for action: action engaging the nursery industry in voluntarily phasing our invasive ornamental plants and promoting, in their place, non-invasive alternatives.
Our first order of business was to measure the scope of the problem and establish a baseline. Working closely with plant science experts to identify the most problematic invasive ornamental plants, and industry experts to identify non-invasive alternatives, we created our first PlantRight plant list. If you can measure it you can manage it, we like to say - to do this, we rely on an annual Spring Nursery Survey. Each spring, partner with UC Master Gardener volunteers to survey more than 200 nurseries and garden centers around the state, and in the process track the retail market for invasive garden plants in California.
Along with informing PlantRight's program strategy, the annual survey allows us to keep PlantRight's plant list manageable and up to date – we add new invaders and retire those that are largely phased out of the trade. It is our program's calling card, and the starting point for conversations with prospective partners and skeptics, alike. It has earned the enthusiastic support of California Certified Nursery Professionals (CCNPro), SaveOurWater, and more.
A Little Less Fight, a Little More Spark
Buying non-invasive means many things, including protecting native species, being good stewards of our beautiful open spaces and waterways, being fiscally responsible and preventing additional taxpayer dollars going to avoidable invasive plant eradication efforts. Buying non-invasive plants is casting a vote for the kind of world you want to live in.
So, why on earth do people buy invasive plants in the first place? (Hint: One big reason has to do with what happens when you turn off the lights). Yep, people who purchased invasive plants were in the dark – they did not know.
In 2013, we learned that the primary drivers behind consumer purchases of invasive plants are: 1) aesthetics – it looks good; and, 2) there was no information on the plant indicating “invasive.” In other words the majority of invasive plant purchases (by consumers) are impulse purchases and would not have occurred had the plant been properly identified as “invasive.”
Come On, Come On…Come On, Come On
Ready to channel your inner Elvis and tackle invasive garden plant problems in ways that make economic sense? (Of course you are!) Here are a few resources to empower more action in your community.
- Share this article
- Sign up for the Spring Nursery Survey Webinar and Training
- View our Plant List at PlantRight.org
- Invasive Plant IQ Test
- View our 2016 Invasive Plants Webinar
- Little Less Conversation, Little More Action (Please) - Video
So this National Invasive Species Awareness Week we encourage you to crank up that volume and bust a move with the PlantRight community (blue suede shoes optional), knowing that YOU are driving actionable awareness…this week, this month and in the years ahead.
Thank you, thankyouverymuch.
Protect California’s Landscape this Camping Season, Don’t Move Firewood!
When people move wood from place to place, they may also be moving invasive insects and diseases that threaten California's landscape and wildland trees. The goldspotted oak borer, which is devastating native oaks in San Diego, was likely brought there from Arizona in firewood. The polyphagous shothole borer, walnut twig beetle and thousand cankers disease, and the pathogen causing sudden oak disease, all continue to spread to new areas on infested wood chips, plant debris, or wood moved for woodworking or firewood.
Over the past year, the California Firewood Task Force has asked the public to "buy it where you burn it"—that is, don't bring wood from home when you camp, do use wood from local sources, and leave leftover wood at the campsite for the next camper. Even if wood does not appear to have borer holes or other evidence of pests, don't assume that the wood is pest free. Be on the safe side and don't move it.
The California Forest Pest Council established the Task Force in 2011 to educate Californians about what they can do to prevent movement of invasive pests in wood. The Task Force developed a Web site, put up billboards across California, sponsored children's activities at parks and fairs, encouraged campgrounds to sell only local firewood, gave presentations across the state, and developed best management practices, posters, and other information to engage the public.
For more information visit www.firewood.ca.gov
