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Once your vegetable crop is in the ground and your disease management programs are well underway there is a sense of calm before harvest. During this period it is important to stay vigilant because as weather conditions change, so does the risk of different diseases.

When it comes to cucurbits, managing fungal leaf spots to maintain crop canopy preserves the potential for high yield and quality fruit. Check out the summaries below to learn how to maximize your application of Syngenta vegetable products to manage diseases caused by fungi.

Cucurbits: What conditions promote disease?

Disease	Ideal temperature	Humidity	Dew or leaf wetness?	Rainfall?
Anthracnose	22 to 27 °C	High	Loves it	Loves it
Gummy stem blight	20 to 26 °C	High	Loves it	Loves it
Powdery mildew	20 to 26 °C	High	Does not need	Does not like

 

What solutions to try?

What to try? (FRAC Group)	Targets	When to try and why?	L/acre*
(29)	Alternaria leaf spot Gummy stem blight  Downy mildew	Early in season to break up other groups due to the long pre-harvest interval of 30 days	0.3 to 0.7
(M5)	Powdery mildew  Anthracnose  Scab  Downy mildew	Flexible timing to protect vegetative growth early, or use as a dependable rotational partner later on.	1.9
(3 + 11)	Powdery mildew Anthracnose  Gummy stem blight  Alternaria leaf blight	Typically applied at flowering. Two active ingredients provide broad-spectrum protection.	0.3 to 0.4
(7)	Powdery mildew  Anthracnose  Gummy stem blight  Cercospora leaf spot  Alternaria leaf spot  Alternaria leaf blight	During fruit set, translaminar activity with long-lasting protection found in SOLATENOL® technology.	0.2 to 0.3
(3 + 7)	Powdery mildew  Anthracnose  Gummy stem blight  Alternaria leaf spot  Alternaria blight**	Applied during fruit development, the ADEPIDYN® technology component of Miravis® Duo provides extended control into harvest.	0.4

*Not all targets are registered on all cucurbit species. Application rate may differ by target and cucurbit species. Application rate may differ by cucurbit species and target. Always consult the product label to confirm the application rate and targets by crop.
**Suppression

Leaf spots, like gummy stem blight and anthracnose can often be confused with angular leaf spot. Keep in mind, the products that protect against leaf spots won’t protect against bacterial diseases. Explore products to target water molds like downy mildew in cucurbits. 

Check out the side-by-side comparison with Miravis^® Duo in zucchini and squash from 2019 and 2020. 



<sup>Performance evaluations are based on internal trials, field observations and/or public information. Data from multiple locations and years should be consulted whenever possible. Individual results may vary depending on local growing, soil and weather conditions. Always read and follow label directions. Trademarks are property of their respective owners. 

Syngenta has developed these materials using information that should result in a reasonable approximation of the information sought. The materials are being distributed to you for information purposes only and for your private use. While every effort has been made to ensure the accuracy and reliability of the information and formulas, no guarantee is given or responsibility taken by Syngenta for the accuracy of the materials or the applicability to your particular circumstances.</sup>

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Always read and follow label directions. ADEPIDYN^®, Aprovia^®, Bravo^®, Miravis^®, Quadris Top^®, SOLATENOL^®, Switch^® and the Syngenta logo are trademarks of a Syngenta Group Company.