Poa Yellowing: This picture shows patches of yellowing Poa most likely caused by pesticide application
If rooting is reduced compared with unaffected turf, the problem could be a fungal disease, invertebrate larvae or plant parasitic nematodes. It is always worth checking out the
reason for turf discolouration because when you know the cause, you can use the most appropriate and effective option(s) for its management. Unfortunately, damage sometimes occurs either accidentally or deliberately but there are laboratories that can analyse both the rootzone and the leaf tissues to identify the product(s) applied. It becomes harder to do this the longer you
Red Leaf Spot: This is an example of a good turf sample sent for disease analysis and shows red leaf spot on bentgrass
leave it to get the analysis done so if you suspect vandalism, act quickly. Laboratories that offer an analysis service want to provide you with a quick and accurate analysis of the problem that you are currently investigating. Sometimes, the information that they can offer is limited by the quality of the samples that they receive for the analysis. Wherever possible, I would suggest that you send samples to a laboratory that works with amenity turfgrasses and which understands the pest and disease problems that they can get. Amenity is a small area when placed alongside
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horticulture and agriculture and laboratories that work primarily outside the amenity sector, can overlook things that are more specific to our situation. All laboratories are there to help - use them, even if its only to chat through the symptoms and get an idea of what other potential causes you may have overlooked.
Dr. Kate Entwistle, The Turf Disease Centre, Hampshire, UK.
kate@theturfdiseasecentre.co.uk
Sherriff Amenity The Pines, Fordham Road, Newmarket, Suffolk, CB8 7LG. Tel. 01638 721888
www.sherriffamenity.com
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