WEATHER

The advanced stage of growth will likely lead to an early start to the fungicide season and possibly more sprays than the past two years. Three ingredients are necessary for Cercospora to get rolling. If any of the three are lacking nothing will happen. The three are:

The sugarbeet has a natural immunity early in the season. Generally the time to get concerned is shortly after row closure. For 2010 that is now for many fields so criteria #1 has been met for many fields. As you can see below environmental conditions as of late as measured by the Wahpeton NDAWN station have not been favorable for infection to take place. Just because the conditions have not been favorable does not mean infection will not take place. And last but not least the inoculum needs to be present. The past two seasons have seen little incidence of Cercospora so inoculum levels should be greatly reduced.

(Aug 12 update): We have had several significant infection periods the past month or so. Now is not the time to interupt the schedule. The leaves are the factory that produce sugar and tons and a reduced diseased canopy will reduce potential yields.

Keeping in close contact with your Agriculturist regarding the timing of your first Cercospora application.

Date	Infection Potential
Sept 6	Slight
Sept 5	Slight
Sept 4	Slight
Sept 3	Slight
Sept 2	Slight
Sept 1	Moderate
Aug 31	Moderate
Aug 30	Slight
Aug 29	Slight
Aug 28	Slight
Aug 27	Slight
Aug 26	Slight
Aug 25	Slight
Aug 24	Slight
Aug 23	Severe
Aug 22	Moderate
Aug 21	Moderate
Aug 20	Moderate
Aug 19	Slight
Aug 18	Slight
Aug 17	Slight
Aug 16	Slight
Aug 15	Slight
Aug 14	Severe
Aug 13	Severe
Aug 12	Severe
Aug 11	Severe
Aug 10	Severe
Aug 9	Severe
Aug 8	Severe
Aug 7	Slight
Aug 6	Slight
Aug 5	Slight
Aug 4	Severe
Aug 3	Severe
Aug 2	Severe
Aug 1	Severe
July 31	Moderate
July 30	Slight
July 29	Moderate
July 28	Severe
July 27	Moderate
July 26	Slight
July 25	Moderate
July 24	Severe
July 23	Severe
July 22	Severe
July 21	Moderate
July 20	Moderate
July 19	Severe
July 18	Severe
July 17	Moderate
July 16	Slight
July 15	Moderate
July 14	Moderate
July 13	Slight
July 12	Slight
July 11	Slight
July 10	Moderate
July 9	Moderate
July 8	Moderate
July 7	Moderate
July 6	Moderate
July 5	Moderate
July 4	Slight
July 3	Slight
July 2	Slight
July 1	Slight
June 30	Slight
June 29	Slight
June 28	Moderate
June 27	Severe
June 26	Moderate
June 25	Slight
June 24	Slight
June 23	Slight
June 22	Slight
June 21	Slight
June 20	Slight
June 19	Slight

Information is for Cercospora infection potential is taken from the NDAWN web site; Wahpeton location. If you have not been to the NDAWN web site you should really take some time and look it over. Click on the link below to get there.