PPFS-AG-C-8: Diplodia Leaf Streak

Nolan Anderson, Carl Bradley, Kelsey Mehl, Kiersten Wise | Sep. 1, 2018 (New)

Diplodia leaf streak of corn is a disease that has become more prevalent in Kentucky in recent years. It is commonly observed in fields in western Kentucky and is easily confused with other corn foliar diseases. Small, round, dark brown-to-tan lesions are first observed on leaves. Dark concentric rings may be observed in the center of early lesions at the infection site on the leaf. These lesions expand lengthwise in long streaks from the infection point and form elongated elliptical lesions. In severe cases, lesions can coalesce to blight large areas of affected leaves.

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ID-249: A Comprehensive Guide to Soybean Management in Kentucky

Ric Bessin, Carl Bradley, J.D. Green, John Grove, Greg Halich, Erin Haramoto, Carrie Knott, Chad Lee, Travis Legleiter, Josh McGrath, Sam McNeill, Javier Reyes, Edwin Ritchey, Montse Salmeron, Jordan Shockley, Claire Venard, Raul Villanueva, Ole Wendroth, Kiersten Wise, Xi Zhang | Jun. 7, 2018 (New)

This publication provides information on soybean growth and development, principles of variety selection, and management practices to maximize soybean profitability in Kentucky.

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PPFS-AG-F-10: Possible Causes of Yellowing Alfalfa

Chris Teutsch, Paul Vincelli, Kiersten Wise | Feb. 16, 2018 (New)

During spring, several leaf spotting diseases--including Leptosphaerulina (Lepto) leaf spot and spring black stem/leaf spot--are common in alfalfa. Leaf spotting diseases result in distinct round to elongated spots that sometimes have a dark margin. Very wet weather in spring and early summer favor activity of leaf spotting diseases in first and second cuttings. Wet and humid weather during summer favor other leaf spotting and blighting diseases. All leaf spots and blights weaken plants, but alfalfa often outgrows the damage in later cuttings. Maintain a regular cutting schedule, cutting at 30- to 35-day intervals.

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PPFS-AG-C-7: Physoderma Brown Spot

Carl Bradley, Brenda Kennedy, Kelsey Mehl, Kiersten Wise | Feb. 1, 2018 (New)

Physoderma brown spot can be a striking foliar disease that is periodically observed in field corn in Kentucky. This publication describes the symptoms and cause of disease, conditions that favor disease development, and options for disease management.

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PPFS-AG-C-6: Holcus Leaf Spot

Carl Bradley, Kelsey Mehl, Kiersten Wise | Oct. 11, 2017 (New)

Holcus leaf spot, a bacterial disease, can be seen sporadically in Kentucky cornfields, and it is challenging to diagnose. This publication describes the disease symptoms, conditions that favor disease, and how to distinguish holcus spot from herbicide injury that can mimic this disease.

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PPFS-AG-C-5: Diplodia Ear Rot

Carl Bradley, Kelsey Mehl, Kiersten Wise | Oct. 11, 2017 (New)

Diplodia ear rot can reduce yield and grain quality by damaging kernels, lowering grain test weight, and reducing grain fill. Incidence of affected ears in the field can vary from 1% or 2% to as high as 80%. Although mycotoxins have been associated with Diplodia ear rot in South America and South Africa, there have been no reports of livestock feeding issues due to mycotoxins linked to Diplodia ear rot in the United States.