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DISEASE CONTROL

Anthracnose

The Down Dirty About Diseases: Anthracnose

Anthracnose is a common problem for superintendents whose courses have creeping bentgrass or annual bluegrass. This disease can appear as foliar blight with infection showing in the leaves or a basal rot that attacks crowns, stolons and leaf sheaths of the turf. The disease presents itself in a variety of ways – yellow or orange in color, irregular patterns, small spots, or in patches up to 1 foot in diameter.

 

Low mowing heights, high traffic, and poor irrigation or fertilization cause high-stress conditions in certain areas of the golf course making them a magnet for anthracnose. Unfortunately, anthracnose knows no seasonal bounds. During hot summer months, creeping bentgrass is susceptible to basal rot symptoms of the disease, however, anthracnose can also present itself as foliar blight during cool and cloudy weather conditions. For annual bluegrass, the opposite is true with basal rot issues occurring in cool overcast weather and foliar blight presenting itself during the hot summer months.

 

Needless to say, there is no shortage of curveballs this disease can throw at you. So, that begs the question, what can we do to control it? 

Welcome to a New Era of DMIs

BASF has a new line of defense against this complex and persistent disease. Maxtima® fungicide and Navicon® Intrinsic® brand fungicide are two new DMI technologies that can be applied at any time, on any turf, at any temperature. Due to its effectiveness, safety and favorable price point, Maxtima fungicide is quickly becoming the new standard for fairway control of anthracnose. For greens – your highest stressed area of turf – we recommend Navicon Intrinsic brand fungicide. This new product combines the active ingredient in Maxtima fungicide with the plant health benefits of our Intrinsic line of products for stronger roots, broad spectrum disease control and improved stress tolerance. 

Spray Program Recommendations

  • June: Maxtima @ 0.6 floz/1,000 >> $150/acre (Most cost effective for fairways plus strong control of dollar spot)
  • July: Navicon Intrinsic @0.85 fl.oz/1,000 >> $330-$450/acre
  • Contact Fungicides should always be part of a good summertime rotation program for anthracnose

Our Research

Clarke, Rutgers, 2015

Anthracnose Control

Maxtima® fungicide and Navicon® Intrinsic® brand fungicide provided excellent anthracnose control at all rates evaluated

Trial Description
Annual bluegrass green

 

Pest 
Anthracnose (Colletotrichum graminicola)

 

Trial Info
Applied 15 May – 7 Aug
14-day interval
2 gal water @ 40psi 

Clarke, Rutgers, 2016

Anthracnose Control

Maxtima® fungicide and Navicon® Intrinsic® brand fungicide delivered superior anthracnose control

Trial Description
Annual bluegrass green

 

Pest 
Anthracnose (Colletotrichum graminicola)

 

Trial Info
Applied 15 May – 7 Aug
14-day interval
2 gal water @ 40psi 

Clarke, Rutgers, 2017

Anthracnose Control

Maxtima® fungicide outperformed all other DMIs and Velista in this trial

Trial Description
Annual bluegrass green

 

Pest 
Anthracnose (Colletotrichum graminicola)

 

Trial Info
Applied 15 May – 7 Aug
14-day interval
2 gal water @ 40psi 

Baird, UC Riverside, 2018

Anthracnose Control

Superior control of anthracnose under high disease pressure with no injury in heat of summer

UCR Riverside Turfgrass
Field Day

 

Turf Type
Annual Bluegrass Putting Greens

 

Pest 
Anthracnose (Colletoctrichum cereal)

 

Applications
Beginning June 6 + every 14 days

Kerns, NCSU, 2018

Control of Anthracnose on a ‘L-93’ Creeping Bentgrass Green

Maxtima® fungicide and Navicon® Intrinsic® brand fungicide demonstrate higher turfgrass quality when applications were made under high heat

Pest 

Anthracnose (Collectochrium spp. [suspected strobilurin resistant]) 

 

Applications
7/3, 7/18, 8/1, 8/15, Aug 28
applied on 14 or 21-day interval for all products  

What the Experts are Saying

Anthracnose control with Maxtima and Navicon

Summer safety with a new DMI from BASF

Maxtima - A new broad spectrum DMI from BASF

Related

Maxtima® Fungicide: Welcome to a New Era

Maxtima® fungicide, our new turf-safe, broad-spectrum DMI that you can spray at any temperature, on any turf. 

Navicon® Intrinsic® Brand Fungicide: Dual Action, Powerful Precision

Navicon® Intrinsic® brand fungicide, our new dual-action DMI that provides effective control of the toughest diseases with strong plant health from the roots up. 

2020 Early Order Program

With this flexible Early Order Program, you have the freedom to build your own fungicide spray program at the right acreages, and earn rebates up to 24%.

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