Wednesday, May 29, 2013

Keep your Property Free and Clear from Invasive Species


As spring has sprung, rain is helping plants grow quickly and the hot summer air nears, it is the time to start preventing invasive species from taking over your lawn, landscape and the land around us. 

Invasive species are plants, animals, or pathogens that are non-native and cause harm. The most effective strategy against invasive species is to prevent them from ever being introduced and established. Preventive measures typically offer the most cost-effective means to minimize or eliminate environmental and economic impacts. Prevention relies on a diverse set of tools and methods, including education. 


Some invasive species feed directly on or make ill fish and wildlife. Invasive plant pathogens can kill forest trees. Invasive plants shade out other plants. Indirectly, invasive species compete for food and space with other species and interfere with their growth, reproduction, and development. Invasive species place other species at increased risk of extinction.  


So what can we do about minimizing the risk of invasive species?  There are lots of things we can do, but as a homeowner, you probably can't do it alone. Using the help of a certified Arborist or professional tree service will help make your efforts make a difference in your efforts to eradicated the invasive species.

Trees "R" Us, Inc. has a wealth of experience and skills to help you combat your unwanted plants and trees. As an agency capable of working across the landscape, Trees "R" Us, Inc. is in a good position to lead efforts to prevent potential invaders for your residence or business.
Ironically, you should first identify and protect forests and grasslands that have not been invaded by invasive species. Prevention includes education and outreach to raise the awareness of the invasive species problem and reduce the chance of unintentional introduction of invasive species. 

Depending on the species invading the other areas of your property, a variety of eradication programs can be implemented. 

By enlisting the skills of our highly qualified staff and certified arborists, as well as our plant health care program, we can achieve a successful invasive species prevention and awareness.  Trees "R" Us, Inc. services homeowners and business owners throughout the North Shore and the suburbs of Chicago. Establishing effective and collaborative partnerships with you is also critical for effective prevention.  We need to work as a team to combat these pests, so we'll be in contact with you regarding the treatment, its progress and further plans of action. 

Please feel free to contact Trees "R" Us, Inc. anytime with your questions or concerns about your landscape or yard.  www.treesrusinc.com or 847-913-9069
We are dedicated to the tree care and tree maintenance industry and in helping our beautiful North Shore area and the Northwest suburbs combat invasive species.

Tuesday, May 21, 2013

Prevent and control the spread of anthracnose!

Spread of Infection

The fungi that cause anthracnose overwinter on infected debris from the tree or on infected buds and cankered twigs.

In the spring during rainy periods, large numbers of microscopic spores are discharged by the fungi. The spores are windblown or splashed by the rain onto the young, growing leaves of host trees. During wet weather, the spores germinate; and the fungi penetrate the leaves, killing the new leaf tissue.

On some species, the fungi in the infected areas of new leaves produce secondary spores, called summer spores. Wind and splashing rain spread the summer spores from leaf to leaf. The rapid increase of anthracnose in the summer and early fall is caused by these summer spores. Summer spores are common on ash and walnut.

Influence of Weather

The severity of sycamore anthracnose appears to be related to prevailing temperatures during March or early April. Twig, bud, and shoot blight are more severe if the prevailing average daily temperature remains relatively cool during the period - below 70 °F (21 °C). Prolonged warm periods of 2 to 3 days when day temperatures reach 80 °F (27 °C) will prevent the development of the fungus and thereby limit the disease severity.

Anthracnose spores are spread by wind and rain. In addition, the spores need wet weather to germinate and penetrate the leaves. Therefore, anthracnose diseases may be severe in years with long, cool, rainy periods. If the following year is warm and dry, anthracnose may be inconspicuous or absent.

Control

In forest stands, anthracnose is impractical to control: spraying and pruning are far too expensive. However, management practices that allow better air movement and more sunshine, such as thinning, may inhibit the diseases by helping the foliage dry rapidly after a rain. Air circulation should be considered when planting trees susceptible to anthracnose.

On shade and ornamental trees and nursery stock, anthracnose can be controlled by destroying the overwintering fungi in plant materials. Raking leaves and pruning infected twigs and branches reduce the amount of inoculum available. This infected material should be burned or otherwise destroyed.

Anthracnose diseases on high-value trees and nursery stock can also he controlled by applying fungicides in the spring. Benomyl, plus a spreader-sticker applied at bud break, will provide good control. A chemical mixture of hydrated lime, copper sulfate, and water (4-4-50), known as Bordeaux mixture, is registered for use against anthracnose on elm, maple, and sycamore; dodine can be used against anthracnose of sycamore and walnut. Specific recommendations on the use of these fungicides differ with the type of anthracnose and with the locality.

Other management practices include fertilization and planting less susceptible species. The application of a complete fertilizer, such as 12-12-12, will improve the vigor of trees weakened by repeated attacks of anthracnose. Some species are less affected. London planetree is much less susceptible than American sycamore; oaks in the red oak group are generally more resistant than white oaks.