QUIZ – Sclerotinia stem rot

Jay Whetter

Sclerotinia stem rot is a hot topic as canola fields come into flower. Three questions on sclerotinia stem rot fungicide timing, weather effects and aerial application.

1.

When crop is uniform, plant populations are on target, canopies are moist and yield exception is average or better, what is  generally the most economical fungicide strategy?

2.

How does hot and dry weather during and after flowering change the sclerotinia stem rot risk scenario?

3.

Most fungicides have label approval for application by airplane. The challenge is water volume for sufficient coverage. A minimum of 100 or 110 litres of water per hectare (~10 gallons per acre) is the standard label rate for ground application of most sclerotinia stem rot fungicides. What is the minimum water rate for aerial application?