Allele-Specific PCR for the Detection of Azoxystrobin Resistance in Didymella bryoniae.

Gummy stem blight (GSB), caused by the fungus Didymella bryoniae, is considered the most widespread and destructive disease of watermelon in the southeastern United States. The quinone outside-inhibiting (QoI) fungicide azoxystrobin (AZO), which inhibits mitochondrial respiration by binding to the outer, quinone-oxidizing pocket of the cytochrome bc1 (cyt b) enzyme complex, was initially very effective in controlling GSB. However, resistance to AZO has been observed in D.

First Report of Pythium deliense Associated with Peanut Pod Rot in Georgia.

In fall 2012 and 2013, peanut (Arachis hypogaea L.) grown in commercial fields in Tift County, GA, showed pod rot symptoms. The disease was primarily damaging pods and kernels and symptoms included brown to black, water-soaked lesions on pods and blackened pegs with white fluffy mycelia.

First Report of Leaf Spot on Onion Caused by Fusarium acuminatum in Georgia.

An unknown disease was observed on shallot onions (Allium cepa L.) in Tattnall County, Georgia, in September of 2012. Disease symptoms included leaf tip die back and scattered light brown lesions on leaves, oval to round in shape, with a size ranging from 0.

Induction and Maintenance of Systemic Acquired Resistance by Acibenzolar-S-Methyl in Three Cultivated Tobacco Types.

Induction and maintenance of systemic acquired resistance (SAR) in 'N' gene containing burley, flue-cured, and oriental tobacco cultivars were assessed by monitoring decreases in the number of local lesions caused by Tobacco mosaic virus (TMV) following treatment with acibenzolar-S-methyl (ASM). Leaf samples were collected from lower, middle, and top positions on seedlings at 3-day intervals over 21 days following ASM treatment and subsequent inoculation with TMV under laboratory conditions. Local lesion number for each leaf was recorded 7 days postinoculation.

First Report of Alternaria Leaf Spot of Banana Caused by Alternaria alternata in the United States.

Research efforts were initiated in 2003 to identify and introduce banana (Musa spp.) cultivars suitable for production in Georgia (1). Selected cultivars have been evaluated since 2009 in Tifton Banana Garden, Tifton, GA, comprising of cold hardy, short cycle, and ornamental types.