General Weather Situation
After last weeks distinctly autumnal feel, this week represents gradual change as high pressure begins to exert its influence on the weather, so drier, warmer, even getting hot by mid-week, but the cool nights will remain as the wind stays in the north. The latter will peg back temperatures on the East coast of the U.K somewhat and in this region there’s a chance that rain from the continent may affect the far South-East and East of the U.K towards the end of this week, but most places will be dry.
The warm high pressure system is sitting out in the Atlantic, to the west of us, so as it pushes in, Ireland will get the nicer weather first arriving in the latter part of Tuesday and then over the course of Wednesday and Thursday, other areas of the U.K will warm up to 20°C + during the day, but temperatures will drop markedly when the sun goes down, so plan those BBQ’s early :). Winds will be reasonably light, but as intimated earlier, primarily from the north, moderating between North-Easterly and North-Westerly, so this will peg back the temperatures a bit, especially when they’re from the North-East as this could bring in some Haar (Sea Fog) from the North Sea.
Spray days will be a case of take your pick this week really with only a low risk of rain showers and these will be primarily at the latter end of Thursday and Friday and more so on the East coast of the U.K. A weak rain front will cross Ireland mid-week, but rainfall amounts will be low.
The high pressure appears to be on track to stay in position and even build next week, with the wind slowly moving round from the north, temperatures could increase during the day, so this could hearld the start of our summer, good news as I’m off to fair St David’s City in me camper 🙂 !!
The cool, wetter weather over the last two weeks has kicked off alot of disease, most of it the usual suspects that I’ve referred in earlier posts, (Take All, Fairy Rings) but also there’s been a good deal of Etiolated Growth (Ghost Grass) visible in fairways, approaches and collars. I’ve attached a fact sheet from last year to explain the current thinking on this disease, but a number of end-users have questioned wether it’s affected by a PGR, liquid fertiliser application. To my why of thinking, it is likely to be encouraged by a fertiliser application, particularly one utilising fast-acting forms of nitrogen, like ammonium sulphate, ammonium nitrate or potassium nitrate, because the plant is effectively ‘bolting’ and anything that increases the growth rate, has to affect this process.
If you read the fact sheet, you’ll see that the suspected cause is the action of a Gibberellic acid (GA) type hormone produced / stimulated by a species of Fusarium fungi and although PGR’s do not appear to affect this process (because they work on a different GA), the fact that they may inhibit the growth of the affected grass less than unaffected grass, may mean that the symptoms are more visible on areas treated with a PGR. All things considered, the biggest driver for Etiolated growth is the weather and typically wet, cool conditions, more normally encountered at the end of summer and during the autumn. So for everybody who’s experienced this phenomenon over the last few weeks, the arrival of drier, warmer weather should lessen the severity as conditions move away from those that favour fungal activity.
Although I’m away next week, I’m going to try and sneak out an update at the end of this week to keep you posted on the progress of the high pressure system.