|
Bermuda Grass Decline and Spring Dead Spot November 2006
|
Devastating diseases of warm season grass often take the form of root pathogens. Two of the more troublesome diseases for Golf Course Superintendents in the warm season grass markets are Bermudagrass Decline and Spring Dead Spot.
Bermudagrass Decline is a potentially devastating turf disease in the southern part of the United States from summer through fall when air temperatures consistently remain between 80-95 degrees F. ....more
|
The ph Factor : Part 1 November 2006 |
A Basic Understanding of pH in water. What is pH?
A seemingly simple question, but many people don’t really understand what pH is, although they are familiar with the pH scale:Seven is considered to be the point of neutrality on the pH scale, neither acid nor alkaline. pH measurements below 7 are considered to be acidic, while those above 7 are considered alkaline. But what do these numbers actually mean? Technically, pH is the negative logarithm to the base 10 of the hydrogen ion concentration:
-Log 10 [H+] ....more
|
Fall Diseases of Turf: Cool Season Brown Patch (Rhizoctonia cerealis) October 2006 |
Although the summer has come to a close, the disease season has not. Fall brings with it a new set of challenges. One of them is cool season brown patch (also known as yellow patch). Caused by the fungus Rhizoctonia cerealis, cool season brown patch typically becomes a problem in the autumn and spring during periods of rainy, overcast weather. Improving surface drainage, applying labeled fungicides in autumn and fertilizing in the spring after the turf has broken dormancy can lessen or prevent the severity of disease outbreaks and promote recovery. ...more
|
Snow Mold Control - Even Without PCNB September 2006 |
With the pending EPA decision to cancel all uses of PCNB on turfgrass*, some superintendents may need to explore new options for snow mold control. Cleary Chemical has a number of products that superintendents can use alone or in combination to build a solid snow mold control program. For more information on the Cleary Snow Mold Control Program, click here.
* For more information on the pending EPA decision to cancel all PCNB uses on turfgrass, visit the EPA’s website: http://www.epa.gov/oppsrrd1/reregistration/pcnb/
|
|
Diseases 0f Turfgrass : Gray Leaf Spot August 2006
|
Diseases 0f Turfgrass : Gray LeafSouthern turfgrass managers are all too familiar with Gray Leaf Spot, a potentially devastating disease of St. Augustine grass and bermudagrass. In recent years, northern turf managers have become familiar with it as well, in particular on their tall fescue and perennial ryegrass turf. Long confused with brown patch in southern climates, northern outbreaks of gray leaf spot (affecting a broad area from Virginia to Ohio to New Jersey) seem to be more easily confused with drought.. ....more
|
|
Summer Patch is a destructive, warm weather disease problem of annual bluegrass, Kentucky bluegrass and fine fescues throughout their ranges. The disease was originally identified as Fusarium Blight Syndrome (FBS) in the 1960’s. . ....more
|
Foliar and Basal Rot Anthracnose July 2006 |
A review of the literature reveals that superintendents are not alone in their struggle with anthracnose, a disease that is not unique to turfgrass. In plants, any leaf disease which is caused by a fungus that produces acervuli (saucer-shaped, asexual fruiting bodies that produce conidia beneath the epidermis of a plant and rupture at maturity) is referred to as anthracnose. ......more
|
What is Resistance and Disease? June 2006 |
Disease Resistance - What does it really mean for your management practices?
The term ‘‘disease resistance” is not a new one in the world of turf management. There are many references in literature, some over 40 years old, citing a “diminished effect”, or a “lack of control” that can be linked directly to the introduction of “biochemically selective” products that attacked a specific action site in the fungal pathogen. These were “penetrant” products that were absorbed into the plant and exhibited a specific ‘mode of action” to control the disease. ....more
|
|
| |
