June 12th

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Hi All,

Just a week or so away from the longest day now and a bit of a sobering thought for all of us is that the evenings will then start heading back again towards winter. This week’s weather is a bit of a rodeo ride between a northern-influencing low pressure and a southern-influencing high pressure so that means cooler and wetter up north balanced out by dry and potentialy pretty hot for the south.

Meanwhile here in The Midlands we’ll be sandwiched nicely between the two 🙂

General Weather Situation

Over the past week we have had some pretty high winds and these have continued through the night as well but you’ll see a change here after Monday as we begin to lose the wind strength. So Monday kicks off with that North-South divide already in place and we see some early rain for Leinster and thicker cloud for Ireland. Across The Irish Sea to the U.K we have thick cloud and showers already affecting North Wales and the north west coastline of the U.K up through Scotland. Further south and east of this we see a pretty dull start to the week with high cloud cover in place. As we move through the morning that rain clears Ireland and North Wales but sits stubbornly over the west coast of the U.K from The Pennines northwards. Further south and east of this we see some sunnier intervals as the cloud cover thins. Through to Monday evening, those showers become confined to north west Scotland as most areas see more in the way of the sun however Ireland picks up a new rain front around dusk pushing into the west and crossing the country overnight. Temperature wise, these reflect that north-south divide with mid-teens for Ireland and those areas of the U.K under cloud vs. high teens for The Midlands, South Wales, The South West and south of England. The wind will continue strong to blustery  (crumbs it was choppy in the boat on Saturday fly fishing :)) and from the west.

Overnight into Tuesday and that rain for Ireland has moved further east and at the start of Tuesday is already affecting north western areas of the U.K, really in a line up from The Pennines. South of this we see another pleasant day, notably with ligher winds allowing the temperature to pick up a degree or two over Monday. As we progress through the morning we still see showers and thick cloud across Ireland, more so across Connacht and Donegal and for Scotland in particular that coastal rain will push inland to affect all areas. So too for the north of England, that rain pushes more inland than Monday and may drift far enough south to reach the North Midlands as well late morning / early afternoon. Through Tuesday afternoon that rain becomes confined to northern counties of Ireland, but stays across most of Scotland whereas further south we see brighter weather make an appearance lifting temperatures into the low twenties for the south of England. Much lighter winds on Tuesday, still westerly but allowing warmer air for the south of England in particular.

Wednesday sees a drier picture over most of the U.K and Ireland, still with some rain pushing across the Scottish Highlands but confined here to the north of Scotland mainly. For Ireland, Wales, the rest of Scotland and England, a much drier day with lighter cloud cover and this means we’ll see temperatures climb into the low twenties across the south of England aided by a change in wind direction to lighter southerlies. All in all, a pleasant day for the U.K and Ireland.

Late on Wednesday night though we see another rain front push into the west of Ireland and overnight into Thursday this moves across Ireland and pushes thicker cloud and some showers across the north west coast of the U.K by the morning rush hour on Thursday. More sunshine and showers for Ireland on Thursday with the west coast most affected by the rain, the same for north west England and Scotland. South of this band of rain we see a much sunnier day with lots of sunshine from the off and this means low twenties are potentially likely with the risk of some thunderstorms kicking off. Under that cloud cover cooler for Ireland and Scotland with mid to high teens and also a little cooler for The Midlands with a change in wind direction to north west.

Closing out the week on Friday, the ‘Glorious 16th’, (a reference to the start of the coarse fishing season on rivers in the U.K and a date that met with so much anticipation as a youngster I could hardly sleep, now it’s met with a shrug of the shoulders and the realisation that I haven’t the time to enjoy this 🙁 ) we have rain and thicker cloud from the off for Connacht and Donegal and this extends into northern England and across Scotland with the rain more western coast-orientated. Some of that thicker cloud may push into the south of England for a time as well. A North-South divide for both Ireland and the U.K with south Leinster and Munster enjoying some fine sunny weather on Friday and joined by Wales, The South West and south of England. Move north though and you’re into thicker cloud across The Midlands. That rain pushes across Scotland during the late morning / early afternoon but stays confined to the north west of England with the north east brightening up through the afternoon. As we progress through Friday afternoon into the evening we see cloud cover burn off to leave unbroken sunshine and that’ll push temperatures up into the mid-twenties for sure across the south of England. Mid to high teens likely for Scotland but Ireland may see temperatures touching the twenties where skies clear. As we close out Friday we see that rain affecting the north west of Scotland intensify and become heavier I am afraid.

So how does the outlook for the weekend look ?

Well with high pressure asserting itself and the northerly low pressure moving off into Scandinavia, we should have a pretty nice weekend on the cards with plenty of dry weather around and sunshine. Temperatures will ultimately depend on cloud cover but for me I’ll be hoping to keep some morning cloud for as late as possible on Saturday to allow the Trout to rise 🙂 . I’d reckon on low twenties for most areas, high teens maybe for Scotland due to thicker cloud cover where they’ll be a risk of some showers of rain particularly a.m. on both days. Winds should be light to moderate and still westerly.

Weather Outlook

Next week is a tricky call because we have a battle between high pressure sitting over us and an enroaching low pressure from the east initially and then joined by another from the west later in the week. So I think next week should start pretty dry and settled for most areas, maybe a chance of rain across the far north on occasion but not heavy. With this kind of pressure chart it means the wind will be more northerly because we are squashed between two pressure systems so the wind gets funnelled down between them, this will peg back temperatures a little. As we progress from mid-week the certainty behind the forecast begins to drop and the risk of low pressure beginning to dominate is much higher so by the end of the week, next weekend we could see low pressure in charge.

Agronomic Notes

The week ahead..

First off let’s look at how Meteoturf projects growth and E.T rates across the U.K….

Meteoturf120617

Starting off with England we see very high Growth Potential in the coming week aided by optimum day and night temperatures and also very high E.T rates with a projected E.T loss of 27mm, so over an inch of rain likely to be evaporated from the ground this week across the south of England.

This means that the grass plant will be under some stress over the coming week with water being lost from the rootzone and with high potential growth rates it will also require more water to support this growth. So water conservation and management will be key this week particularly. This type of week (and last week, weekend) also highlights the presence of root pathogens like Take-All and Root-Knot Nematode, to name but two.

These pathogens cause damage to the root system and often this damage goes un-noticed until we run into a period of weather when the grass plant requires more water for growth and water is being lost quickly from the rootzone because E.T rates are high. So then we start to see the symptoms of these pathogens even though the actual damage (and time for effective control) was most likely two months back. Hot, windy days in June are classic for this scenario so I guess one of the key take homes is moisture management and making sure that your grass plant doesn’t dry out too much in the coming week.

A PGR application will help this process by slowing down the growth rate of the grass plant and thereby allow more efficient moisture management.

Wales will have a lower E.T loss due to lower temperatures but still a very strong growth rate so here again, plant growth regulation is a priority.

For Scotland and Ireland we have a different scenario with much lower E.T loss so this isn’t a concern here but we still have pretty strong growth so a PGR application should be uppermost in your mind or more likely you already have your areas covered on this front and don’t need me to tell you :). Likely we’ll see more disease pressure from Microdochium nivale in these areas because of the more consistent rainfall and therefore plant leaf wetness followed by some reasonably mild, night time temperatures as well, which will allow humidity to build.

Mixing a fungicide and a PGR ?

The problem here is for sure getting a spray day and this means we will have a potential requirement to mix a fungicide and a PGR. (TE-based of course Mr…)

Now this question is cropping up on my radar more and more when we have strong active growth and high disease pressure. Truthfully I am cautious / wary of this mix because I have seen phytotoxicity during the autumn period in trials when mixing a PGR and a fungicide.

So if you’ve managed to get this far down the blog and are willing to share your experiences, please drop me a comment on what has worked for you or maybe hasn’t.

Researching the net shows scant information in this area and of course we have more than tankmix comptability to consider. What if the PGR ‘changes’ the uptake / efficacy of the fungicide by compromising its mode of action, we need to be sure on this before marching forward with a our sprayers. The logic of the mix is clear and with higher growth rates and more aggressive disease outbreaks, there is some logical synergy in slowing down the growth rate of the plant, potentially then extending the period of efficacy of the fungicide, but we need to know it is both chemically and biologically compatible.

With less fungicide families to choose from and stronger growth extending later into the autumn, regulating a plant prior to a fungicide application makes sense then too. Mental note to ones self, research-required.

Ok, a short, sharp blog this week for me as I have alot of trials to get down this week so I’ll be strapped to my faithful Hardi sprayer, ensconced in PPE and likely shedding pounds in sweat 🙂

Happy days, never happier when I’m R&D’ing….(except when I’m fishing of course :))

All the best..

Mark Hunt

 

2 thoughts on “June 12th

  1. Ben Burrill

    Hi Mark

    I always take interest in your agronomic notes, I liked the GDD research on longevity of PGR’s.

    In relation to PGR (primo maxx) to tank mix with fungicide I have been doing this for 2.5 seasons now with generally good results.

    Reply
    1. mark.hunt Post author

      Hi Ben,

      Many thanks for the feedback on the blog and for the comment on tank-mixing of fungicides and PGR’s.

      My trials are going out Wednesday so we will see 🙂

      Cheers

      Mark

      Reply

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