Gardens

Controlling Ticks

deer tickThe Centers for Disease Control and Prevention (CDC) recommends creating a tick-safe zone. Ticks feed on blood of animals including humans. Tactics to reduce the attractiveness of animals traveling into your yard will keep the number of ticks dropping off of them reduced. Do not feed the birds as chipmunks, squirrels and many other animals visit to eat fallen seeds. Remove leaf litter as a hiding place for small animals and ticks. Clear tall grass and brush from edges of turf and around home. Keep lawn mowed. Keep any wood piles dry and neatly stacked to discourage rodents from using it as a home. Do not place patio or play areas near wooded areas where animals and ticks will be living. Use fencing to keep out deer and larger animals from the yard. Create a 3-foot wide barrier of gravel or wood chips between lawns and woods to stop ticks from entering the lawn. Ticks do not like to cross hot, dry expanses.

Chemical control includes the active ingredient bifenthrin or carbaryl or permethrin or pyrethrin. These are best applied when the ticks are in their small nymphal stage during the month of May and early June. See the CT Tick Management Handbook written by the CT Agricultural Experiment Station for much more detailed information.

Written by Carol Quish

Originally posted by UConn Extension in 2014.

Can I Water Vegetables with my Rain Barrel Water?

By Joan Allen

Originally published by the UConn Home & Garden Education Center

rain barrel against side of house in with shrubs
Photo credit: CT DEEP

Collection of rain water from roofs using rain barrels is growing in popularity because of its many environmental and practical benefits. It can help the environment by diverting water that might contain contaminants away from storm drains and the natural bodies of water that those empty into.  Depletion of well water can be a benefit when this non-potable water is used instead of the tap for things like washing cars, irrigation of plants, and flushing toilets. If you’re on a city/public water system, it can save money to use rain water where you can, too. But is using rain water to irrigate vegetables and fruits safe? Are there contaminants in it that could make people sick? Let’s take a look at what’s been studied.

A few universities in the U.S and abroad have done some work to look at potential contaminants in roof run-off water including heavy metals like zinc, copper, lead and others as well as bacteria such as E. coli and other pathogens. Testing done so far has shown low risk from these, but there is some. And of course, it depends on the type of roofing material, the environment (ie acid rain, urban vs. rural, etc) and possibly other factors. In one study, most of the metals tested the same in rain barrel water as in rain water before it hit the roofs, so little to no concern there. One exception was zinc, and elevated levels could lead to build up of this element in soils. At high enough levels, this can cause injury to plants and those plants should not be consumed (1). Monitor for this by having the soil tested.

While risk appears to be low, there were a few samples in studies (1, 2) where E. coli or total coliform bacterial levels exceeded official standards for some uses. Rain barrel water should NEVER be used for potable purposes such as drinking water, cooking or washing. Where do the bacteria in run-off come from? The main sources would be fecal matter from animals such as squirrels and birds that land and move around on the roof.

But if you’d like to water your vegetable garden with rain barrel water, are there ways to do it safely?

Dr. Mike Dietz, Assistant Extension Educator at UConn with expertise in water management recommends “not using roof water on anything leafy that you are going to eat directly. It would be OK to water soil/plants where there is no direct contact”. This is consistent with recommendations from other experts who suggest applying the water directly to the soil and avoiding contact with above-ground plant parts. An ideal set-up would be to hook up a drip irrigation system to your rain barrel(s). Pressure will be improved when they are full and if they are elevated. A full rain barrel can be pretty heavy, at about 500 lbs. for a 55 gallon unit, so make sure they are on a solid and stable base such as concrete blocks.

If possible, and this is done in larger collection systems automatically, don’t collect the ‘first flush’ of water off the roof. This would be the first few gallons. In a ¼” rainfall as much as 150 gallons can be collected from a 1000 ft2 roof surface (3). The first water to run off tends to have higher concentrations of any contaminants because of them building up on the roof since the previous rainfall event.

Another more practical way to minimize risk of pathogen/bacterial contamination is to treat the collected water with bleach. Rutgers University recommends treating 55 gallons of water by adding one ounce of unscented household chlorine bleach to the barrel once a month (or more often if rain is frequent). Allow this to stand for 24 hours before using the water for irrigation so the bleach can dissipate.

Apply collected water in the morning. Wait until leaves dry in the sun before harvesting. Ultraviolet light from the sun will have some disinfecting effect.

It is recommended to have the rain barrel water tested for E. coli. Be sure to follow the testing lab’s instructions for collection, storage and time sensitivity of the samples.

Thoroughly wash all harvested produce. In addition, you should always thoroughly wash your hands with warm, soapy water after they are in contact with collected water.

In summary, there are risks to using collected rain water for irrigation of food crops. In most cases, the risk appears to be low, and using the above sanitation practices can reduce risk.

References:

  1. DeBusk, K., W. Hunt, D. Osmond and G. Cope. 2009. Water quality of rooftop runoff: implications for residential water harvesting systems. North Carolina State University Cooperative Extension.
  2. Bakacs, M., M. Haberland and S. Yergeau. 2017. Rain barrels part IV: testing and applying harvested water to irrigate a vegetable garden. Rutgers New Jersey Agricultural Experiment Station. Fact Sheet FS1218.
  3. Rainfall as a resource. A resident’s guide to rain barrels in Connecticut. CT DEEP.

Extension Offers Greenhouse Biological Control Conference

 

liliesUConn Extension is sponsoring a Greenhouse Biological Control Conference.  This one-day educational program will be held onWednesday, June 20, 2018 at Room 100, WB Young Building, University of Connecticut in Storrs, CT.

The speakers featured at this educational program include:

  • Michael Oleykowski,  Syngenta  who will be speaking on Developing an Effective, Integrated Control Program 
  • Debbie Palumbo-Sanders, Bioworks, Victor, NY   who will be speaking on Biofungicides and Their Fit into Your IPM Program
  • Kerri Stafford, Cavicchio Greenhouses, Sudbury, MA  who will be speaking on Implementing Our Biological Control Program
  • Annie White, Nectar Landscape Design Studio, Burlington, VT  who will be speaking on Top Plants for Attracting Pollinators: Natives and Beyond
  • Carol Glenister, IPM Laboratories, Locke, NY  who will be speaking on Plants Talk Biocontrol: How to Use Plants to Manage Pests

A registration fee of $40 is due by June 14 payable by check only to the University of Connecticut. Included in the cost of admission: coffee, continental breakfast, lunch, informational handouts and parking.

Five pesticide recertification credits will be offered. For more information contact: Leanne Pundt at leanne.pundt@uconn.edu or call 860.626.6855 or click here for the program brochure or visit the website: http://ipm.uconn.edu/pa_greenhouse/

This work is supported by the Crop Protection and Pest Management grant no. 2014-70006-22548/project accession no. 1004700 from the USDA National Institute of Food and Agriculture.

Spring Garden Chores

By Carol Quish

Originally Published by the UConn Home & Garden Education Center

Some garden perennials were not so lucky this winter. If it appears the voles and chipmunks have been busy feeding and tunneling their way through parts of the garden, you will see heaved up tunnels in the lawn from moles. Fill in any tunnels. Mouse traps sent in the runs might work as a control measure. Cover the trap with an up-side-down bucket to keep out birds and cats.

There is still time to remove, crush and kill gypsy moth eggs from tree bark. Hope for a wet spring to develop the fungus that infects the young caterpillars after they hatch from any egg masses that were left.

While cleaning up garden debris, watch for beneficial insect overwintered eggs like the praying mantid’s egg case below. Carefully remove the stem and egg mass to a safe place outside so it can hatch naturally when the weather warms. Do NOT bring it into your home unless you want it to hatch inside your heated house!

praying mantid egg case
Praying Mantid egg case

Another spring chore can be done inside the home. Cut the top six inches off of leggy houseplants to give them a good pruning. Repot any that need it to get them ready for another year of growing. Stick some cuttings in a vase of water to get them to produce roots. Some plants do respond better than others and it is worth a try to produce new, free houseplants to share with friends.

Seedling Sales!

New Britain ROOTS summer program participants with vegetables they grew in the garden
New Britain ROOTS summer programming in 2017. Photo credit: Molly Deegan

Spring has sprung, and it’s time to get seedlings in the ground! If you are looking for locally grown seedlings for your garden, the following community based organizations are hosting seedling sales to support their work. See below for the listing of organizations in Connecticut who will be hosting sales:

New Britain ROOTS:
Thu, May 10th: Pulaski Middle School, 3pm-4:30pm

757 Farmington Ave, New Britain, CT 06053

 

Friday, May 11th & Friday May 18th: Gaffney Elementary, 3:30pm-5pm
322 Slater Rd, New Britain, CT 06053

 

Friday, May 25th: New Britain High School, 2:30pm-4pm
110 Mill St, New Britain, CT 06051

 

Common Ground:
Saturday May 12th, 10:00 am – 12:00 pm
358 Springside Ave New Haven, CT 06515

plants growing in a school garden
Photo: Molly Deegan

Fresh New London:
Saturday May 19th, 2018, 10:00 am – 1:00 pm

120 Broad St., New London, Connecticut 06320

 

New Haven County Extension Council

Thursday, May 10th, 2018, 2 pm – 6 pm

Saturday, May 12th, 2018, 10 am – 1 pm

305 Skiff Street, North Haven, Connecticut

Check out our two projects run out of UConn Extension that specifically promote local sourcing, both in the Connecticut community and in Connecticut Schools: Put Local On Your Tray and Heart CT Grown. Local sourcing includes local gardening supplies, both for school gardens or for home!

Another Win for Rain Gardens

By Amanda Ryan

Originally published by the Center for Land Use Education and Research

aerial image of retention pond in residential neighborhood
Image of retention pond from Activerain.com

It’s well known that rain gardens are great for infiltrating stormwater but people may not realize that they also help destroy common stormwater pollutants. Several studies have found that rather than accumulating pollutants in their soils, rain gardens tend to biodegrade them instead. One study (LeFevre et al., 2011) investigated petroleum hydrocarbon levels in 58 rain gardens in Minneapolis, MN representing a wide range of sizes, vegetation types, and contributing area land uses. The researchers found that petroleum hydrocarbon levels were well below regulatory limits in all the rain gardens sampled. And a tip for future rain garden installers, rain gardens planted with more robust vegetation with deeper roots did a better job at breaking down pollutants than those planted with only turf grass.

A rain garden’s ability to biodegrade pollutants is in contrast to what happens in more conventional stormwater management structures like retention ponds. Retention ponds are often installed with larger developments to receive a large volume of stormwater from impervious areas (ex. houses and roads in a subdivision, roof and parking lot of a Home Depot). Other studies (Van Metre et al., 2009; Van Metre et al., 2000; Kamalakkannan et al., 2004), found that pollutants like PAH’s (polycyclic aromatic hydrocarbons), a type of petroleum hydrocarbon, accumulate in the sediments of stormwater retention ponds. This creates a very expensive maintenance issue for retention pond owners when the time comes to remove and dispose of built up contaminated sediments.

Side note – stormwater can pick up PAHs from dust on pavements treated with coal tar  sealants which are commonly used on parking lots, driveways, and playgrounds (but they have recently been banned from use on State and local highways in CT).

If by now you’re energized to install one or many rain gardens on your property, check out NEMO’s  rain garden site and Rain Garden App!

Black Knot of Plum & Cherry: Prune Now!

By Joan Allen

Originally published by the UConn Home & Garden Education Center

black knot of plum and cherry trees
Photo: UConn

Black knot of plum and cherry, caused by the fungus Apiosporina morbosa, may be overlooked during the growing season when the leaves are hiding the galls, but this time of year they are hard to miss, especially when they are as abundant as they are on the tree in the photo below.

This is a serious disease of these trees and can eventually kill susceptible varieties. Management options include sanitation, resistant varieties and properly timed fungicides.

Where manageable, prune out all galls during the dormant season and dispose of them off-site, burn or bury them. This is because even removed galls may still produce spores that can cause new infections. Prune  6″ below the visible edge of the gall because the fungus can be invading the wood in that area prior to gall development.

This disease can affect both orchard and ornamental varieties of plum and cherry but some of the tart cherries are less susceptible. Native wild cherries are hosts of the disease and provide a reservoir of inoculum for orchards and ornamentals. It’s helpful to remove those nearby where possible. For new plum plantings (fruiting/orchard), ‘President’ is highly resistant. Moderately resistant options include ‘Methley’, ‘Milton’, ‘Early Italian’, ‘Brodshaw’, ‘Fellenberg’, ‘Shiro’, ‘Santa Rosa’ and ‘Formosa’. ‘Shropshire’ and ‘Stanley’ are considered quite susceptible.

Here’s how disease develops: Infections occur in the spring on new growth from spores produced on the surface of 2+ year old galls. Spores are produced and spread during rainy weather and shoots must remain wet for a period of time for the spores to germinate and initiate an infection. Infections can occur at temperatures of 50°F or higher when water is present for the required period of time. Over the course of the first summer, a small greenish brown swelling develops. By the end of the second summer, the gall or knot becomes hard, rough and black. These galls begin producing spores the following spring. Galls expand in size each year until the branch is girdled (killed all the way around) and then they die. Once a twig or shoot is girdled, the portion beyond the gall can’t get any water or nutrients and dies as a result. Sometimes, larger branches and trunks can become infected, presumably through wounds.

What if you have a susceptible tree and want to prevent this disease? If you know you have a source of infection (hosts with galls nearby, either wild or on a neighboring property) and you’ve had some infections, keep up with the monitoring and pruning, fertilize and water as necessary to prevent stress, and use preventive fungicides, such as lime sulfur during dormancy (organic option) or chlorothalonil or others labeled for this disease. Other than lime sulfur, applications should be made as directed on the label beginning at bud swell and until new terminal growth ceases.

Spring Compost Sales

compost facility

Calling all green thumbs. CAHNR is happy to announce sales dates for the 2018 spring compost sale. We will be open on April 27 and 28th. Sales hours will be Fridays 1:00pm to 4:30pm and Saturdays 9:00am to 3:00pm. Sales are cash and credit card only. Sales will be cancelled if it is raining. The cost will be $25.00 per yard and there will be no upper or lower limits to the amount you can buy. Please call 860-486-8567 for more information.

Master Your Garden With Our Spring Courses

Upcoming Classes:

common witch hazel leaf
Photo: Wikipedia

Ethnobotany – April 28th in Torrington

Growing Trends at the Garden Barn – May 2nd in Vernon

Boot Camp for Your Senses – May 3rd at Edgerton Park Carriage House

Digital Garden Photography Basics – May 6th at Auerfarm in Bloomfield

Pruning Trees and Shrubs – May 22nd in Bethel

Forest Pests: Emerald Ash Borer and More – May 25th in Vernon

Online registration for all classes is available at http://s.uconn.edu/47o

Garden Master Classes are offered through the UConn Extension Master Gardener Program. For Certified Master Gardeners they provide continuing education as part of the Advanced Master Gardener certification process.

These classes are also open to the general public. Anyone with an interest in gardening and horticulture is welcome!

 

Put Local On Your Tray (Or Plate) In April

Put Local on Your Tray is a farm-to-school program helping Connecticut schools serve and celebrate regionally grown food. Even if you’re not a school, they have some advice for getting local onto your plate this season.

spinach and greens being grown in greenhouse
Photo: Molly Deegan

Days are getting slightly warmer and longer, the breeze is sharp, and the land is both awakened and nourished by fresh spring rain. Farmers are in a busy period of transition, from indoor planning and preparing for the height of summer – to the beginning stages of planting outdoors – making sure everything is ready to go. While there may not be an abundance of produce to choose from this month, there still are some special products to take advantage of for their especially sweet and distinct flavors of spring that they offer. For instance, mixed greens!

Spinach is our suggested local item to look out for – according to our Tray team Farmer Liaison, Shannon. After a long winter, the sugars stored in it’s leaves give it flavor hard to find any other time of year. Seen below, are rows of sweet greens growing at Massaro Community Farm in Woodbridge.