Key Points:
Trials in South Canterbury investigated disease development and the influence of fungicides (timing and products) on disease incidence and yield. The following is from two seasons of trials and should be considered as interim information. Further research is needed to confirm if these trends are consistent.
- The research clearly indicates the importance of the timing of fungicide application in relation to disease progress. In 2005-06 the disease incidence increased from the 3rd node thus the important fungicide timing was the 7th node application. In 2006-07 the disease incidence didn’t increase until after the 7th node. Application after early flowering would be too late for effective disease control.
- Fungicide application before the disease incidence reached 5% was the most cost effective disease control strategy in 2006-07.
- A two spray fungicide programme gave the best disease control in both years. However, the timings of the best fungicide programme differed between the years indicating the need for an
- understanding of disease development.
- An evaluation of fungicide products on disease incidence and yield, indicated a number of products reduced infection and significantly increased yield. Many of these products are not currently registered for use on peas. Proline & Comet (not registered) gave good disease control in both years and the one years data from 2006-07 indicate good control at half rates.
- Additional research is required to further refine timing of fungicide application in relation to disease and plant development and to better determine fungicide products for use on peas.