Tar Spot: Fight Back with Concept AgriTek Fungicide Bio-Aid

Tar spot is a devastating fungal disease of corn that has been spreading rapidly across the U.S. Midwest in recent years. First identified in Indiana and Illinois in 2015, tar spot is now found in over a dozen states. The fungal yield robber has the potential to cause severe yield losses of 30-50 bushels per acre or more in heavily infected fields.

The tar spot fungus, Phyllachora maydis, thrives in cool, humid conditions. It produces small, raised black spots on corn leaves, husks and stalks that resemble specks of tar. These spots are fungal fruiting structures called stroma that contain thousands of spores. The spores spread by wind and rain to cause new infections, allowing the disease to proliferate quickly when environmental conditions are favorable.

Once tar spot lesions appear, the damage is already done. The fungus colonizes leaf tissue and disrupts photosynthesis, leading to reduced grain fill and premature plant death. Severe infections can also weaken stalks and cause lodging. By the time symptoms are visible, it’s too late to prevent significant yield loss.

Fighting Back with Bio-Aid Fungicide

With no corn hybrids yet available with complete resistance to tar spot, fungicides are currently the most effective tool growers have to protect corn yield. Research shows that well-timed fungicide applications can significantly reduce tar spot severity and preserve 20-30 bushels per acre or more compared to untreated fields.

However, not all fungicides are equally effective against tar spot. The disease is best controlled by products that contain multiple modes of action and have long-lasting residual activity[2][4][6]. Applying fungicides with the right active ingredients at the optimal timing is critical for success.

Concept AgriTek: Advanced Fungicides for Tar Spot Control

Bio-Aid is Concept AgriTek’s EPA-registered fungicide. The powerful in-season fungal-fighter is powered by Bio-Tek, to deliver an initial contact kill. The product is safe to both the user and the environment, provides contact control of many fungal in-season pests and is extremely cost advantageous at a two-application rate versus popular competitors.

“We saw over 11-bushels/acre increase against two of the top fungicides in the country,” says North Carolina farmer, James Allen. “Bio-Aid out-performed both; one by 8 bushels/acre and the other by 5 bushels/acre. And with the price point on Bio-Aid versus other fungicides, the ROI was through the roof.”

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