Prevent soybean diseases with Headline

May 15, 2008 12:12 PM

There's still time to prevent the worst diseases and get the full Plant Health benefits of Headline® fungicide on soybeans. The fact is that even the lowest level of disease drains yield from your fields even though the symptoms remain unseen, often hidden beneath the canopy. So the key is to apply Headline now and prevent disease outright while enabling your soybeans to benefit from improved growth efficiency, stress resistance and ultimately higher yields at harvest.

You can apply Headline between the first trifoliate to the appearance of 1/8″ seed in pods at the top four nodes, with the optimal timing being between R2 (full flowering) and R4 (full pod), in advance of disease outbreaks. It's critical to keep the crop disease-free during the early reproductive stages for maximum Plant Health benefits.

The benefits of a preventative application are well established. Over the past four years of on-farm field trials and on hundreds of thousands of acres across the nation, Headline improved soybean yields by 4 to 8 bu/A.

The following section outlines the four of the most harmful diseases to soybeans and how you can identify them.


In seedlings, the first signs of this disease are brown water-soaked lesions on cotyledons. The cotyledons wither while the stem may develop sunken lesions. In maturing plants, the disease may appear as brown, irregularly shaped spots on stem, pods and petioles. It may result in premature leaf fall.

Frogeye leaf spot

This disease appears post-bloom. It primarily infects leaves but may affect pods, seeds and stems. Look for small brown to gray spots surrounded by a thin, dark, reddish ring. In severe cases, premature leaf fall occurs and the spread of the disease to the pod results in seed-coat discoloration, a key indicator of lost quality. This disease most often appears post-bloom.

Septoria leaf spot

This disease may cause yield loss in extremely wet growing seasons. However, its primary effect is the defoliation of the lower soybean leaves.

Asian soybean rust

This disease first appears in the lower canopy as small, gray spots on the underside of leaves and along leaf veins. The spots turn tan or red-brown with a distinctive pimple-like appearance. Premature leaf-fall follows, with seed quality and yield suffering as a result.


Always read and follow label directions.

Headline is a registered trademark of BASF. ©2008 BASF Corporation. All Rights Reserved.
APN 08-01-088-0003


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