{"id":1170,"date":"2021-01-04T09:48:00","date_gmt":"2021-01-04T09:48:00","guid":{"rendered":"https:\/\/greencastadvisory.com\/blog\/leaf-wetness-and-temperature\/"},"modified":"2022-08-23T12:06:42","modified_gmt":"2022-08-23T12:06:42","slug":"leaf-wetness-and-temperature","status":"publish","type":"post","link":"https:\/\/greencastadvisory.com\/nor\/blog\/leaf-wetness-and-temperature\/","title":{"rendered":"Leaf wetness and temperature"},"content":{"rendered":"

All experienced turf managers know there are some weather conditions that lead to high Microdochium patch<\/a> pressure.<\/p>\r\n\r\n\r\n

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Prolonged periods of leaf wetness and optimum temperatures are exactly those. I wrote an article recently on this concept and how these factors influence the development of Fuz. Read it here…..<\/a><\/p>\r\n\r\n\r\n\r\n

By plotting these two factors on a graph we can see just how that looks during high pressure and low pressure periods. <\/p>\r\n\r\n\r\n\r\n

Each dot represents one hour of the day and it shows both the temperature and the % leaf wetness. These aren’t easy stats to find however I have access to Syngenta’s Agricultural data<\/a>. However for me this begins to justify the expense of a leaf wetness sensor for a weather station.<\/p>\r\n\r\n\r\n\r\n

During this period of the year you can be pretty confident that disease pressure is close by. <\/p>\r\n\r\n\r\n\r\n

At the end of October this year I was getting a good few calls and seeing social media reflect the same thing that disease pressure was high and people were disappointed with the control they’d achieved.<\/p>\r\n\r\n\r\n\r\n

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The pressure had subsided only a couple of days later and the calls stopped. For me the more important factor is how many dots are falling outside of the Redzone. Each one of these represents a break in disease pressure, these lifelines are critical during this period of the year.<\/p>\r\n\r\n\r\n\r\n

If we don’t get these breaks then even the most robust disease management programme is tested to its limits. <\/p>\r\n\r\n\r\n\r\n

Getting everything right really is critical during these periods<\/p>\r\n\r\n\r\n\r\n