Yield Loss Prediction Tool for Field-Specific Risk Management of Asian Soybean Rust

Brazil - February, 2007 (Joe Omielan) - Project Update

Dr. Cláudia Godoy sent some photos of the plots and activities in Londrina.

Here are typical soybean rust symptoms on the lower leaves.

This shows sporulating rust lesions on the underside of a leaflet.

To measure Light Interception (LI) a line quantum sensor is placed below the crop canopy.

The incident light above the canopy is measured and logged at the same time as the light levels below the canopy.

Cláudia measured the photosynthetic rates in control and diseased leaves in the field and in the greenhouse using the LI 6400.

Here’s the sensor head clamped to a leaflet.