Key Tasks for July
Continue cutting regularly to ensure a good sward density. It may sometimes be helpful on any newly established grass to lightly roll the surface before cutting to ensure that the does not get pulled out by the action of the mower. Also, ensure that any mowing equipment used is keenly set to cut without tearing. Let the clippings fly to assist nutrient levels and retain water in the surface.
The soil can dry out quickly in any periods of sunny conditions, so make sure that your irrigation systems are functioning correctly as, once soils become hydrophobic and dry patch sets in, it becomes very difficult to get water back into the surface.
You may choose to use wetting agents to ensure uniform wetting, particularly on soils prone to dry patch.
Continue the work of brushing to keep the air circulating around the base of the plant, particularly important for removing early morning dew and controlling disease.
Spike when the conditions allow, but keep your regime flexible.
Do not apply fertiliser during periods of drought, unless you have the means to water in.
- Check posts are secure
- Check team dugouts are stable and anchored securely. Make sure that they are tidy and free from litter
- Repair and maintain fence lines
- Sweep up/vacuum fallen leaves
As we approach the halfway point of the year, we can hopefully afford ourselves a brief moment to look back at the past six months and reflect on the accomplishments and challenges we have overcome. Although June has provided some excellent warm weather, which has meant we have been able to enjoy being outdoors, it doesn’t necessarily follow that it has been good for managing turf. Needless to say, when you look back and review the role the weather has played in managing turf so far this year, it hasn’t been easy. Evenings and mornings were cold right up to the end of May, which has affected growth, alongside the lack of rainfall we have experienced. The typical UK average rainfall for June is 77.2mm; up to writing this report, the current UK average was 34mm. Coming out of that low growth period in May, coupled with the reduced rainfall, has led to challenging conditions for turf managers. Looking back at last year’s report, it was a similar story; when we reached the 25th June, the monthly average only just went above 10mm!
Looking ahead to July, there is little sign of what will now be, for many, much needed rainfall. Where rain is forecast, it doesn’t appear it will be anything substantial enough to make a significant impact. Of course, where irrigation systems are in place, these can be deployed to reinstate the moisture that has been lost through the day, but where these are not available, managing drought conditions may become a major priority. Where irrigation is available, managing the resource effectively to adhere to extraction licenses etc. will continue to be important. Daily temperatures look set to be around average for July, with 29 days at 18°C or above. Notably, there aren’t many days forecast above 24°C, which may be important for those who are regularly managing anthracnose disease outbreaks.
Water management is a key tool for maximising overall plant health, even more so in periods of prolonged dry weather as those we are currently experiencing. It is important to ensure there is enough moisture to support nutrient uptake and growth whilst trying not to over apply to areas of turf where more is not required. Moisture meters are an excellent tool, particularly in these situations, as they provide factual data as opposed to a visual interpretation which is variable from person to person. Guidelines can be set for optimal readings and selective or hand watering can be implemented to only irrigate those areas where there is a requirement, thereby reducing over-watering the plant and reducing overall water usage. Wetting agents are useful for managing water and ensuring it enters to soil profile, where it is needed. Regular aeration, using a variety of tine depths, also helps to maintain pathways for water to enter the rootzone and pass through it.
Applications of seaweed will elicit important beneficial defensive and stress responses in the plant and associated micro-organisms when applied at times of turf stress. Ascophyllum nodosum is a good seaweed source as it has to deal with tidal stresses. Half its life is spent under water and half its life out of water. Amino acids also play an important role in abiotic stress tolerance, helping plants to prepare for and cope with additional stresses such as varying changes in temperature and volumetric water content. They are also excellent at ensuring nutrients get into the plant, therefore, through dry periods where every part counts, they can be a useful addition to tank mixes to ensure efficient uptake of products. Calcium and Potassium are both key nutrients when considering biotic and abiotic stress due to their role in cell walls and water regulation. Therefore, look out for these when selecting your fertiliser.
For Anthracnose (Colletotrichum cereale), warm, humid weather and increased light intensity are the primary environmental factors controlling the development of conidia. Laboratory studies indicate that Colletotrichum cereale produces conidia at temperatures between 24‑32°C, with increased maturity of conidia observed at 28°C compared with lower temperatures. Once conidia have been excreted from the acervuli in a water‑soluble matrix, they can be spread by wind, water or human activity, but need continued leaf surface moisture to establish. Little and often applications of nitrogen have been shown to mitigate the development of the disease and helps to minimise any stress on the plant. Applied preventatively fungicides are available as a method of control, although some will find the above measures sufficient when dealing with this disease.
Emergency authorisation for Acelepryn has been issued for the treatment of chafer grubs only. The purchase window for chafer grubs expires on 28th August and the storage and application window ends on the 28th September 2022.
A separate authorisation is awaiting approval for Leatherjackets, but this is yet to be approved. As with previous years, all applications must be approved by a BASIS qualified advisor, who has had the relevant product training.
For anyone not able to apply Acelepryn, cultural and biological controls, in the form of Entomopathogenic nematodes, are the only legally authorised controls available. For best results, ensure you follow applications guidelines.
B.Sc (Hons) | BASIS | FACTS
- Keep your machinery in tip top condition
- Grease where you find a grease nipple, oil where you see a metallic moving part, check the oil, check the water
- Clean it when you've finished