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VeggieDiseases > Posts > Fungicide Updates-April 2014
April 08
Fungicide Updates-April 2014

Midwest Vegetable Production Guide Update-Hard copies of the Midwest Vegetable Production Guide for Commercial Growers 2014​ have been available since early January.  However, this guide, also known as the ID-56, is also available for as an on-line version.  One advantage of the online version is that it is free versus the $10 price for the hard copy.  Another advantage of the on-line version is that updates can be added when needed.  Updates and changes that have been made since the printing of the ID-56 are listed below:

Fruiting vegetable chapter-The rate for Fontelis on tomato for Botrytis gray mold and for early blight/Septoria leaf blight was changed to 16-24 fl oz./A on page 123.  

Fruiting vegetable chapter-The fungicide Priaxor was added for anthracnose, Botrytis gray mold (suppression only), early blight and Septoira leaf blight, late blight (suppression only) and white mold.  The rate for all the diseases above is 4-8 fl. oz./A except for late blight, which is 8 fl. oz./a.  Note that Priaxor is the only foliar fungicide listed for tomatoes and white mold.  However, Priaxor is not labeled for the greenhouse.  Applicators must be in possession of the supplemental label. 

Cucurbit chapter-In the watermelon variety resistance to Fusarium wilt table on page 97, the watermelon variety Distinction now has a rating of ‘++++’, meaning it has an excellent Fusarium wilt resistance rating. 

Cucurbit chapter-Proline 480 SC is now labeled for Fusarium wilt of watermelon at 5.7 fl. oz. per acre.  May be applied by ground or chemigation application equipment.  Do not use in water used for hand transplanting. 

This product has been labeled as a result of research performed at Purdue University and elsewhere.  The Proline label allows one drip application.  If Proline is used as a drip application for Fusarium wilt, use it at transplant.  I have been able to show that Proline can lessen the severity of Fusarium wilt of watermelon.  However, the results depend on many factors including the amount of the Fusarium wilt fungus in the soil and the host resistance of the variety used.  If you have any questions or thoughts about using this product for Fusarium wilt of watermelon, please contact me at the phone number or email to the right. 

Cucurbit chapter-The fungicide Merivon was added to several diseases in the chapter at 5.5 fl. oz./A:  anthracnose, gummy stem blight, powdery mildew and Plectosporium blight.   Alternaria leaf blight was added at 4-5.5 fl. oz./A.  Applicators must be in possession of the supplemental label. 

I had the opportunity to use this product on powdery mildew of cantaloupe a few years ago:  I had excellent results.  However, Merivon has active ingredients in groups 7 and 11.  My research has shown that in the past, group 7 active ingredients work well on powdery mildew (for example, Pristine and Fontelis).  Group 11 products have not worked well for powdery mildew of cucurbits in Indiana. 

Sweet corn chapter-The fungicide Priaxor was added for use on several diseases-page 188.

Onion chapter-The fungicide Merivon was added for use for Alternaria purple blotch, Botrytis leaf blight and downy mildew.  Page 161. 

Legume chapter- The fungicide Priaxor was added for use on several diseases.  Pages 146-147.

If you are unable to access the on-line version of the Midwest Vegetable Production Guide for Commercial Growers 2014 or have any questions, please contact me.  Or feel free to comment below.​


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