Flowerdale Nursery  & Landscaping
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Flowerdale Nursery & Landscaping

 DORMANT DISEASE CONTROL

 

All trees and shrubs are susceptible to diseases at one time or another. Fruit trees are no exception. Apples, apricots, figs, grapes, nectarines, peaches, plums and persimmons will all benefit from a simple prevention program.

 

Clean Up Your Garden

 

Debris will harbor insects and diseases. A good general clean-up removing old leaves, spent flowers, old fruit, nuts, and dead or broken branches will eliminate a lot of insect and disease hiding places. You may wish to compost this material, as proper composting will kill most existing organisms. For more information, see the section on “Organic Gardening”.

 

Preventative Spraying Program

 

FALL – Properly timed spraying will virtually eliminate the chance of disease in spring and summer. Two fall sprayings are recommended. The first should be at leaf fall (about mid November). A second spraying can be made about a week later to ensure complete coverage. The tree’s bark may contract with the onset of cold weather, sealing in various diseases such as shot hole fungus. It is therefore essential to spray before cold weather sets in. Spray with a solution of Liqui-cop according to the directions.  Do not spray if rains are expected within 48 hours. If rains do occur, re-apply the proper mixture.

 

WINTER – Two winter sprayings will subdue the most difficult to control diseases such as apricot brown rot and peach leaf curl. Use a solution of Liqui-cop the first part of January and again in mid February.

 

SPRING – The timing of spring spraying is crucial. Apply when flower buds begin to swell and show a pink or white color. Peaches and nectarines can be sprayed again when half the flower petals have fallen from the trees. The peach leaf curl fungus, Taphrina deformans, lives on leaves, twigs and bark during the winter. If not controlled at this critical time, it will infect young buds and leaf tips as they emerge. Again use a solution of Liqui-cop. Sprays must be repeated if rain occurs within 48 hours of application. This spray program may be applied to many trees and shrubs that are leafless in the winter months. Ask any of our California Certified Nursery Professionals for further assistance.

 

Additional insecticidal spraying may help eliminate wormy apples, peaches and nectarines. Spray with a product containing Pyrethrins when most or all the flower petals have dropped from the tree. Spray again each seven to ten days for three or more sprayings, as moths will continue to lay eggs on the young fruit.

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