This spring, growers needed to do more than suit up in their rain gear. The wet conditions in many areas meant that growers needed to fine-tune their fungicide lineup, too. A wet spring means that conditions are ripe for increased disease pressures going into the summer months. However, taking a proactive approach helps stop damaging diseases such as Powdery mildew or Botrytis bunch rot from setting in.
In general, higher humidity and cooler spring temperatures are favorable for Powdery mildew. The fungal infection colonizes on the surface of plant tissue and invades top layers of epidermis cells, causing extensive (and expensive) losses to plant growth, crop yield and fruit quality.
Powdery mildew requires season-long management because of early season inoculum and subsequent infection caused by fungal spores that can infect, develop new spores and re-infect throughout the summer. Secondary infection cycles can occur approximately every five to 30 days, depending on the weather.
If Powdery mildew is left untreated, it can cause double the trouble, leading to Botrytis bunch rot. Prior to fruit ripening, humid conditions coupled with elevated nitrogen levels and cluster compactness make for a perfect storm for Botrytis bunch rot. Grapes in condensed clusters can fracture due to pressure, opening entry points for fungus as well as a moist environment for the spores to germinate.
Experience has shown that a preventative program not only provides control for Powdery mildew and other damaging diseases like Botrytis bunch rot, but also reduces the risk for epidemics later. Arysta LifeScience brings a portfolio of preventative and curative protection with PH-D® and ELEVATE® Fungicides.
A broad-spectrum FRAC Group 19 fungicide, PH-D provides excellent knockdown of Powdery mildew while preventing bunch rot caused by Botrytis and other secondary rot-forming fungi such as Cladosporium. Its unique mode of action (FRAC 19) and ability to inhibit fungal cell wall formation make it a perfect addition to your resistance management tool box. And for an even stronger resistance management strategy, PH-D can be rotated with fungicides of other modes of action. The product features a 4-hour re-entry interval (REI) and a zero-day PHI, allowing for greater flexibility during the season.
ELEVATE is a protectant fungicide that binds with the waxy layer of the grape and disrupts the Botrytis life cycle from first bloom all the way to harvest. It is the only member of the FRAC Group 17 fungicide class for resistance management and, when used in a tank mix or rotation with other fungicides, it delivers dependable and economical Bunch rot control. Primarily a protective fungicide, ELEVATE also provides post-infection activity when applied early in the disease life cycle.
Although you can’t control the weather, you can control how to plan for it. To learn which lineup of fungicide is the best match for your vineyard, visit Arysta-NA.com or consult your local Arysta LifeScience sales representative.
Always read and follow label directions. ELEVATE and PH-D are registered trademarks of an Arysta LifeScience Group Company. Arysta LifeScience and the Arysta LifeScience logo are registered trademarks of Arysta LifeScience Corporation. © 2019 Arysta LifeScience Group Company. SPC-1908E