May Bowls Diary 2005

Laurence Gale MScin Bowls

May Bowls Diary

By Laurence Gale MSc


Air temperatures have not really risen much above 16 degrees centigrade in recent weeks, resulting in a slow start to the growing season. Grass growth has been significantly restricted, slowing down the speed of the greens.may2005bowls-diary-dennis.jpg

Most groundstaff may have already applied a spring/summer fertiliser, perhaps something like a 9/7/7 and will be looking apply a summer fertiliser, reducing the N and P inputs to maintain a balanced growth during May. At the end of the month an application of a slow release fertiliser will see you through June and July.

Regular brushing and sweeping are important tasks to keep the surface clean, open and dry. A dry surface will aid resistance to disease. Keep an eye on fungal disease attack and use approved fungicides to treat infected areas. Fusarium can be prominent during cool, damp weather.

The sward will be actively growing due to the amount of moisture in the ground, coupled with the stimulation of fertiliser applications. Regular mowing will be required to maintain sward height at around 4-8mm. Verticutting/grooming, fortnightly, can be carried out to help speed up the green and help improve the health of your turf.

With the development of mowing technology, most fine turf mowers have cassette fitting attachments that offer additional maintenance operations such as grooming and verticutting. These are both operations that effectively remove thatch and side shoot growth enabling the promotion of an upright plant and denser turf growth.

Aerating with micro tines or sarrell rollers helps keep the surface open, allowing gaseous exchange and good surface drainage.


Seeding sparse or bare areas can be continued. Any rise in soil or air temperatures will help germination. Use germination sheets to aid this process but remove the sheets regularly to check for diseases. Remember that without good seed to soil contact the operation is useless. Ensure you use new seed as old material may not give you the required germination rates.

Irrigation systems need to be checked out, inspect installations for leaks and check that the sprinklers work. There may be a need to irrigate during May as air temperatures rise and daylight hours are getting longer, increasing the likelihood of the ground and surfaces drying out.

It is always important to keep a diary of what work you have carried out, stating times of operations and amounts of materials used. Also, keep weather records. This information is very useful, especially if problems arise.

There are a number of performance quality standards (BS7370:P3, A6 standards) that can be used to measure the condition of your green. These include the measurement of:-

  • Length of herbage (mm)

  • Ground Cover %

  • Pest & Diseases %

  • Root depth (mm)

  • Thatch (mm)

  • Infiltration (mm per hour)

  • Rebound resilience %

  • Relative % bounce

The results are measured against predetermined standards (high, standard and basic levels). These can be seen in the IOG Guidelines for Performance Quality standards (part one, sports surfaces natural/non turf).

These standards can be used as a bench mark for you to aspire to and maintain.

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