Incorporation of Cultivar and Fungicide Selection into Disease Advisory Program for Peanuts

Institution:

Virginia Polytechnic Intitute and State University

Budget ID:

1347

Project ID:

421

Report BID:

State:

Virginia

Region:

Virginia

State Group:

VA-52

Project Fiscal Year:

2015

Category:

Pest/Disease

Report Type:

Report Received Date:

Investigator:

Mehl

Project NPB Budget:

$9,000

For the second year, four peanut cultivars (Bailey, CHAMPS, Sullivan, and Wynne) were evaluated for disease resistance/tolerance, yield, and quality when grown under different fungicide programs and in locations varying in disease pressure. Disease incidence and severity varied among the two test locations in 2015, with high levels of leaf spot and moderate levels of CBR and Sclerotinia blight at the Hare Road location; and moderate leaf spot, low CBR, high Sclerotinia, and moderate southern stem rot pres??ure at the Tidewater AREC location. Overall, Sullivan and Bailey were the most resistant to disease with Sullivan in some cases outperforming Bailey in terms of disease resistance and yield. Fungicide treatments impacted yields, but grading factors and overall crop value on a per pound basis was only influenced by cultivar. When overall crop value on a per acre basis was calculated using yield and grading factors for the three trials conducted in 2014 and two trials in 2015, Sullivan was consistently the highest regardless of fungicide program. Though impacted by disease pressure, in many cases a foliar fungicide program only provided adequate disease control and high yields and overall crop value when resistant cultivars such as Sullivan and Bailey were planted. High-oleic Sullivan, which produces high yields with minimum fungicide inputs, and is a good replacement for Bailey in Virginia peanut production. 

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