{"id":1043,"date":"2020-06-03T13:46:00","date_gmt":"2020-06-03T13:46:00","guid":{"rendered":"https:\/\/greencastadvisory.com\/blog\/the-lockdown-lowdown-week-7\/"},"modified":"2022-06-20T06:24:44","modified_gmt":"2022-06-20T06:24:44","slug":"the-lockdown-lowdown-week-7","status":"publish","type":"post","link":"https:\/\/greencastadvisory.com\/fr\/blog\/the-lockdown-lowdown-week-7\/","title":{"rendered":"The Lockdown &#8211; Lowdown Week 7"},"content":{"rendered":"<p>As turf management levels increase and golfers return and the Lockdown Trials reach week 7 it&rsquo;s time to draw some conclusions. <\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/i2.wp.com\/greencastadvisory.net\/wp-content\/uploads\/2020\/06\/Overview-looking-from-SW-to-NE-once-a-week-plots-in-foreground-2-1.jpg?fit=900%2C675&#038;ssl=1\" alt=\"\" class=\"wp-image-3493\"\/><\/figure><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">Whats the point?<\/h4>\n\n\n\n<p>Maybe it&rsquo;s the fact that I had another birthday this week &#8211; (thanks for all the kind birthday wishes, What a nice bunch you are) or maybe it&rsquo;s just that I&rsquo;ve had a few days off and need to get back to work but I found myself asking \u00ab\u00a0what&rsquo;s the point?\u00a0\u00bb don&rsquo;t worry &#8211; everything&rsquo;s fine but as I processed yet another graph showing the evenness of cut I really have begun to question what are we learning from this trial now the greenkeeping world gets up and gets on whilst we keep this trial in a hypothetical lockdown.<\/p>\n\n\n\n<p>This week I&rsquo;ve tried to draw a few conclusions<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What have we learned? the beginning of some conclusions<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">Impact of cutting regime<\/h4>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/i1.wp.com\/greencastadvisory.net\/wp-content\/uploads\/2020\/06\/5mm-to-3-5-mm-tc-graph.png?fit=900%2C475&#038;ssl=1\" alt=\"\" class=\"wp-image-3484\"\/><figcaption>Turf quality on 1-10 scale<\/figcaption><\/figure>\n\n\n\n<p>Less mowing = healthier turf at higher heights of cut<\/p>\n\n\n\n<p>One cut a week isn&rsquo;t suffcient to maintain healthy turf at lower heights of cut in periods of growth<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">How can you reduce growth?<\/h4>\n\n\n\n<p>The more Primo you apply the more growth suppresion you get. <\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/i1.wp.com\/greencastadvisory.net\/wp-content\/uploads\/2020\/06\/image-1.png?fit=900%2C504&#038;ssl=1\" alt=\"\" class=\"wp-image-3487\"\/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">GDD applications present some challenges<\/h4>\n\n\n\n<p>As you&rsquo;ll be aware we set out three application windows for our applications of PrimoMaxx II to try to establish some differences.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Every 7 days<\/li><li>Every 50 Growth Degree Days<\/li><li>Every 100 Growth Degree Days<\/li><\/ul>\n\n\n\n<p>We know GDD windows can be tricky to hit so we have built a GDD on our website (<a href=\"https:\/\/www.greencast.co.uk\/growing-degree-days\" target=\"_blank\" rel=\"noopener\">see here&#8230;&#8230;&#8230;<\/a>) to try and simplify the process and make it easier to get more out of your Primo applications. So how did the STRI get on trying to hit those windows?<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">7 Days applications <\/h4>\n\n\n\n<p>Great &#8211; they haven&rsquo;t missed on &#8211; time it for a Friday and consistently apply it then (the spray conditions have been on our side)<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">50 GDD applications <\/h4>\n\n\n\n<p>Whilst aiming for 50 GDD they achieved the following intervals:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>42 GDD<\/li><li>49 GDD<\/li><li>76 GDD<\/li><\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">100 GDD applications<\/h4>\n\n\n\n<p>Whilst aiming for 100 GDD they achieved the following intervals:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>91 GDD<\/li><li>95 GDD<\/li><\/ul>\n\n\n\n<p>This highlights the challenge, looking for spray dates that work with GDD is tricky &#8211; it generally falls on a :<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Weekend<\/li><li>Day when you have a shotgun start<\/li><li>The day your sprayer operator is sick<\/li><li>The day your sprayer breaks down<\/li><li>It&rsquo;s too windy<\/li><li>Its raining<\/li><\/ul>\n\n\n\n<p>So seeing the hassle and challenges involved in hitting a GDD window &#8211; what are the benefits?<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">The benefits of using GDD<\/h4>\n\n\n\n<p>Outside of the benefits of using Primo I set out to prove the benefits of using GDD &#8211; and I think we&rsquo;re starting to see it.<\/p>\n\n\n\n<p>When you start regulating the growth of a putting surface you begin to present yourself with some challenges. Unintentionally you can over regulate during periods of low growth and sneak into additional growth from a rebound effect during periods of high temperature. <\/p>\n\n\n\n<p>This can lead you to believe Primo is giving you inconsitent suppresion and means your management program (feed, cutting regime, etc) can begin overreacting to a situation you have unwittingly created yourself.<\/p>\n\n\n\n<p>When using Primo on a putting surface I believ the objective should be to achieve as consitent a level of suppression as you can throughout the season. The below tables are begining to show exactly that.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/i1.wp.com\/greencastadvisory.net\/wp-content\/uploads\/2020\/06\/7-Day-image.png?fit=900%2C533&#038;ssl=1\" alt=\"\" class=\"wp-image-3488\"\/><\/figure><\/div>\n\n\n\n<p>Whilst the 7 day applications give us the most suppression thay also give us the widest variance of 30% &#8211; meaning managing a putting surface gains another layer of complexity.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/i0.wp.com\/greencastadvisory.net\/wp-content\/uploads\/2020\/06\/50-GDD-image.png?fit=900%2C527&#038;ssl=1\" alt=\"\" class=\"wp-image-3489\"\/><\/figure><\/div>\n\n\n\n<p>Using 50 GDD application windows has reduced that with 25% variance &#8211; and since these applications have been around half as regular as the 7 days we wouldn&rsquo;t expect to see a difference. Perhaps if the last application had been closer to 50 GDD rather than 76 GDD then that would have been smoother?<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/i0.wp.com\/greencastadvisory.net\/wp-content\/uploads\/2020\/06\/100-GDD-image.png?fit=900%2C487&#038;ssl=1\" alt=\"\" class=\"wp-image-3490\"\/><\/figure><\/div>\n\n\n\n<p>The 100 GDD intervals show the lowest at 21% variance. Which for me is the objective &#8211; Using Primo on a putting surface should be about achieveing consistent growth suppression and I suspect if we had a 130 to 150 GDD application then that would be our most consistent of them all.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">So &#8211; What have we learned?<\/h4>\n\n\n\n<p>If you&rsquo;re using Primo to purely surpress growth then apply as often as you wish knowing the suppresion is less likely to be consitent.<\/p>\n\n\n\n<p>If you&rsquo;re using Primo to help manage a putting surface &#8211; GDD models will give you a more consitent result.<\/p>\n\n\n\n<p> <\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/i0.wp.com\/greencastadvisory.net\/wp-content\/uploads\/2020\/06\/Plots-mown-3-times-a-week.jpg?fit=900%2C675&#038;ssl=1\" alt=\"\" class=\"wp-image-3492\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>As turf management levels increase and golfers return and the Lockdown Trials reach week 7 it&rsquo;s time to draw some conclusions. Whats the point? Maybe it&rsquo;s the fact that I had another birthday this week &#8211; (thanks for all the kind birthday wishes, What a nice bunch you are) or maybe it&rsquo;s just that I&rsquo;ve\u2026<\/p>\n","protected":false},"author":2,"featured_media":1044,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[38],"tags":[],"class_list":["post-1043","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-plant-growth-regulator","entry"],"acf":[],"_links":{"self":[{"href":"https:\/\/greencastadvisory.com\/fr\/wp-json\/wp\/v2\/posts\/1043","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/greencastadvisory.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/greencastadvisory.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/greencastadvisory.com\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/greencastadvisory.com\/fr\/wp-json\/wp\/v2\/comments?post=1043"}],"version-history":[{"count":0,"href":"https:\/\/greencastadvisory.com\/fr\/wp-json\/wp\/v2\/posts\/1043\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/greencastadvisory.com\/fr\/wp-json\/wp\/v2\/media\/1044"}],"wp:attachment":[{"href":"https:\/\/greencastadvisory.com\/fr\/wp-json\/wp\/v2\/media?parent=1043"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/greencastadvisory.com\/fr\/wp-json\/wp\/v2\/categories?post=1043"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/greencastadvisory.com\/fr\/wp-json\/wp\/v2\/tags?post=1043"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}