Friday, July 25, 2014
PLACERVILLE, CALIFORNIA
99 CENTS

Master Gardener: Plan now for dormant spending

By
November 5, 2010 |

By John Kochanowski
UCCE / El Dorado County Master Gardener

We can feel the hint of winter in the air and leaves are falling from your trees. Once the leaves are off the trees, it is time to protect them from next year’s pests and problems.

Late fall and winter is the time to spray your trees to protect them from bacterial invasions like fire blight and the bacterial blasts that affected many trees this year. Spraying trees in the dormant season with horticultural oil kills over-wintering eggs of the fruit tree leaf roller, gypsy moth, tent caterpillars and other caterpillars that spend the cold season in the bark. It also controls scale and the over-wintering eggs of mites and aphids.

If you noticed leaf curl on your fruit trees, the time to prevent next year’s reoccurrence is in December or early January. A single treatment of fixed copper or preferably, a Bordeaux mixture will often be sufficient. If we have another late, wet spring an additional application would be advised before bud break in spring.

Bordeaux mixture has been used for decades as an effective fungicide and bactericide to control diseases of tree fruits, nuts and vine fruits. It is best applied in dormant season. Application to leaves can cause yellowing and loss of the leaves.

A Bordeaux mixture is preferred to fixed copper because it will adhere better in wet weather. The downside to Bordeaux and most sprays is you must wear appropriate protective gear, and take care near house paint and ornamentals. The spray will leave a blue residue and is corrosive. Eye and skin protection is mandatory.  You will find complete instructions on the Bordeaux mixture in Pest Notes Publication No. 7481. This publication and others like it can be downloaded at no charge from the University of California Statewide Integrated Pest Management Program (IPM) Website at ipm.ucdavis.edu in the homes, gardens, landscapes and turfs section.

The mixture

While there are many Bordeaux mixtures, a 10-10-100 mixture works well for many plant diseases. Just like fertilizer, the numbers represent pounds of material in the mixture. The first number is pounds of copper sulfate, the second pounds of hydrated lime, and the last, the gallons of water used.  In our quantities, this means a gallon of water contains 3 1/3 tablespoons of copper sulfate and 10 tablespoons of hydrated lime.

In non-commercial quantities, it is easiest to prepare stock solutions of the lime and copper sulfate. Mix 1 pound of copper sulfate and a gallon of water in a plastic bucket. This solution can then be stored indefinitely in a clearly labeled glass bottle. Do the same with a pound of fresh hydrated lime and a gallon of water. Let stand at least two hours before use. When you are ready to spray, put 2 gallons of water in a plastic bucket and add a quart of each solution while stirring with a wooden paddle. Continue stirring for several minutes after adding the solutions.

Powdered copper sulfate or bluestone dissolves easily because of its fine texture. It is better for a Bordeaux mixture than lump copper sulfate. Keep it dry. If it gets wet it will lump and be difficult to work with and will clog your spray equipment. You can use hydrated lime or slaked lime. Hydrated lime is easier to work with. It should be fresh, as exposure to air carbonates it. Since it is a dust, be sure to wear eye protection and a good dust mask. You will need your lungs for a long time, so buy the more expensive dust mask for maximum protection. It will be thicker and can be found at the better building supply outlets.

Cautions

You should not spray when it is windy, or when humidity will be over 90 percent for 48 hours. Some plants are sensitive, so check the label.  Wear long sleeved protective clothing and goggles when spraying. You can buy disposable plastic lined coveralls that will protect your skin from exposure to the corrosive and coloring effects of the spray. You do not want to end up looking like a member of the Blue Man Group.

Application

Your first dormant application should be made after the rains start to assure that the trees are not water stressed. If you irrigate your trees, you do not have to worry about this. Do not apply if the temperature is below freezing or if it is foggy. Do not spray your citrus trees since they do not go dormant.

For tree size applications, it is best to buy a pressurized spray tank. I prefer a 1 gallon tank because I need to use a ladder to reach some of my taller trees and I would rather carry 8 pounds up a ladder than 16 pounds. I fill three tanks at once and then can spray all of my trees. Read and follow the instructions for your sprayer. You will be using a corrosive product, so don’t have an accidental discharge of material. Imagine your spouse or mother cautioning you to be careful. Pick a calm day with no imminent rain. Thoroughly spray the bark. Be sure to constantly shake the sprayer to keep the mixture in solution and to prevent clogging. Bordeaux mixture is highly corrosive, so thoroughly rinse equipment three times after use.

For a mixture that will remain on the tree for the entire rainy season, combine 1 ½ quarts of the solution with 2 gallons of water. At bud break in spring, or on plants that may be sensitive, use 1 pint of the solution with 2 gallons of water.

Remember that after bud break, the bacteria are already established, so the time for prevention is while the leaves are off the tree and before you see those buds starting to open. This seems like a lot of work, but you will be rewarded next spring with healthier trees and more fruit.

On Saturday, Nov. 13, UCCE Master Gardeners will present a free class on “African Violets and Other House Plants.” The class will cover how to plant and care for the many varieties of African violets and other house plant selections. The class starts at 9 a.m. and will be held in the Bethell-Delfino Agriculture Building at 311 Fair Lane in Placerville.

Master Gardeners are available to answer home gardening questions Tuesday through Friday, 9 a.m. to noon, by calling 530-621-5512. Walk-ins are welcome. The office is located at 311 Fair Lane in Placerville. For more information about our public education classes and activities, go to the Master Gardener Website at  HYPERLINK “http://ceeldorado.ucdavis.edu/Master_Gardener/” or ceeldorado.ucdavis.edu/Master_Gardener/.

If you are interested in becoming a Master Gardener, read the information and download an application from our Website or pick one up at our office. The deadline to submit applications is next Monday, Nov.15.

Comments

comments

Master Gardner

.

News

 
Scaffolding issue makes for contentious meeting

By Wendy Schultz | From Page: A1, 2 Comments | Gallery

 
District 2: Candidates debate jobs versus lifestyle

By Dawn Hodson | From Page: A1, 2 Comments | Gallery

Accident: 1 bullet hits 2

By Cole Mayer | From Page: A1

 
Help available for breastfeeding mothers

By Health and Human Services Agency | From Page: A3

 
El Dorado County School Board vacancy

By El Dorado County Office of Education | From Page: A8

 
.

Opinion

Popular science

By Mountain Democrat | From Page: A4

 
The weekly Daley: A good time to be there…

By Chris Daley | From Page: A4

Something to think about: More than what you see

By Wendy Schultz | From Page: A4

 
.

Letters

Support of Director Prada

By Letters to the Editor | From Page: A5

 
Uphold the Third Amendment

By Letters to the Editor | From Page: A5

Bureaucracy

By Letters to the Editor | From Page: A5, 1 Comment

 
Imagination Theater’s play

By Letters to the Editor | From Page: A5

Watch whom you’re calling ‘conservative’

By Letters to the Editor | From Page: A5Comments are off for this post

 
Fake ‘small farms’ steal from residential EID customers

By Letters to the Editor | From Page: A5Comments are off for this post

People of Placerville

By Letters to the Editor | From Page: A5

 
Computer scam phone calls

By Letters to the Editor | From Page: A5

.

Sports

Sports Scene: July 24, 2014

By Democrat Staff | From Page: A6

 
Quarter century later, Rypien wins ACCG again

By Andrew Hazard | From Page: A6 | Gallery

Outside with Charlie: Paddle time

By Charlie Ferris | From Page: A6

 
Midget Lites join tomorrow’s action

By Bill Sullivan | From Page: A6

El Dorado rallies for last-inning victory

By Mike Bush | From Page: A6

 
Rush sit a win from Series

By Jerry Heinzer | From Page: A7

Tasmanian Devils go undefeated

By Patty Pope | From Page: A7

 
.

Prospecting

El Dorado wines win in Amador

By Democrat Staff | From Page: B1

 
Things to do: July 25, 2014

By Democrat Calendar | From Page: B2

Suds entice the taste buds

By Krysten Kellum | From Page: B2 | Gallery

 
Rhythm and Views goes bluesy

By | From Page: B3

Have an Hawaiian vacation at Carson Road wineries

By Carson Road Winery Asociation | From Page: B3Comments are off for this post | Gallery

 
Summer fun is happening in Twain Harte

By Fire On | From Page: B4Comments are off for this post

Manzanita doubles the music

By Table Nectar And Manzanita | From Page: B5

 
Recording artist at Busby Cellars

By News Release | From Page: B6

Hands4Hope hosts school supply drive

By News Release | From Page: B6

 
Supergroup plays Harris Center

By Carrera Productions | From Page: B6

Artists invited to go western

By Art On The Divide | From Page: B7

 
Visit Tahoe artists during tour

By Special to the Democrat | From Page: B7

Reggae on the River celebrates 30 years

By Reggae On | From Page: B7Comments are off for this post

 
.

Essentials

Lake levels 7-24-14

By Michael Raffety | From Page: A2

 
Crime Log: July 11-13

By Cole Mayer | From Page: A2

Building permits 7/7-11/2014

By Michael Raffety | From Page: A2

 
.

Obituaries

Wallace Murrel Thomas

By Contributor | From Page: A2

 
.

Real Estate

How to have a garden party, minus the whining

By Marni Jameson | From Page: HS3

 
Most common mistakes homebuyers make

By Ken Calhoon | From Page: HS4

.

Comics

Speed Bump

By Contributor | From Page: A9

 
Tundra

By Contributor | From Page: A9

Working It Out

By Contributor | From Page: A9

 
Shoe

By Contributor | From Page: A9

Sudoku

By Contributor | From Page: A9

 
Rubes

By Contributor | From Page: A9

TV Listings

By Contributor | From Page: A9

 
New York Times Crossword

By Contributor | From Page: A10

Horoscope, Sunday, July 27, 2014

By Contributor | From Page: A10

 
Horoscope, Saturday, July 26, 2014

By Contributor | From Page: A10

Horoscope, Friday, July 25, 2014

By Contributor | From Page: A10

 
.

Home Source

How to have a garden party, minus the whining

By Marni Jameson | From Page: HS3

Most common mistakes homebuyers make

By Ken Calhoon | From Page: HS4