From 11a5977f0e8eb9314e976a8b65763df4f1880d72 Mon Sep 17 00:00:00 2001 From: Tor-Einar Skog <tor-einar.skog@nibio.no> Date: Wed, 29 Nov 2023 15:03:41 +0100 Subject: [PATCH] Add description to README --- README.md | 47 ++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 46 insertions(+), 1 deletion(-) diff --git a/README.md b/README.md index 9b107e5..21b81b8 100644 --- a/README.md +++ b/README.md @@ -1,6 +1,51 @@ # SeptoriaApiicolaModel -This repository contains the implementation of the Septoria apiicola model. +<img src="src/main/resources/images/septoriaapiicola.jpg" title="S. apiicola in celery (Photo: E. Fløistad, NIBIO)"/> +<p>This model is based on a calculation of how leaf wetness periods influence +infection of celery by <em>Septoria apiicola</em> in susceptible host plants.<p> +<p>Forecasts of infection risk are given after a minimum of 12 consecutive hours +of leaf wetness. The wet periods are calculated from sensors placed 30 cm above +ground. If such a sensor is not available, data from leaf wetness sensors placed +2 m above ground are used.</p> +<p>The model is developed in Michigan, USA and published by Lacy, 1994.</p> +<p>It is generally assumed that this model has additional relevance for Septoria petroselini in parsley.</p> +<h3>Warning interpretation</h3> +<p><em>The following recommendations are provided for the Norwegian celery production.</em></p> +<p>The model is a tool to decide when to start looking for initial disease +outbreaks. It is not considered accurate enough to provide reliable advice for +timing of fungicide applications under Norwegian conditions. </p> +<p>If inoculum is present, infections are expected to develop 7-14 days after +the first infection risk periods (yellow or red warnings). It is recommended to +intensify field inspections after periods with risk warnings to detect early +infections of <em>Septoria apiicola</em>. </p> +<ul> +<li>Green: No risk of infection.</li> +<li>Yellow: Weather conditions favorable for infection risk. No known sources of +inoculum in the region.</li> +<li>Red: Risk of infection and infections of Septoria late blight has been +reported in the nearby region. Disease reports and field inspections are +performed in collaboration with advisors in the Norwegian Agricultural Advisory service.</li> +</ul> +<p>Graph legend: Blue bars indicate periods of at least 12 consecutive hours of +leaf wetness. Black bar indicate date of first field observation of Septoria late +blight.</p> +<h3>Forecast season (Norway only)</h3> +<p>In Norway this model is generally started June 1 and ends September 30. </p> +<p>The model is running on all weather stations located in regions of commercial celery production.</p> +<h3>Model validation</h3> +<h4>Norway</h4> +<p>Validation of this model under Norwegian conditions is ongoing. The current +recommendation for this model is as a tool for timing of field inspections. </p> +<p>Studies of weather conditions, spore production and infection events have been +carried out in field trials at Ås from 2012-2016. Preliminary results indicate a +good fit, although some adjustments could improve the model, particularly in +connection with rain events (Nordskog and Le, 2014). </p> +<h4>Internationally</h4> +<p>The model is developed in Michigan, USA and published by Lacy (1994)</p> +<h3>References</h3> +<p>Lacy, M.L. 1994. Influence of wetness periods on infection of celery by +<em>Septoria apiicola</em> and use in timing sprays for control. Plant Disease 78, 975-979.</p> +<p>Nordskog, B. og Le, V.H. 2015. Varsling av selleribladflekk. Gartneryrket nr 6, s14-15.</p> ### Development -- GitLab