University of Kentucky College of Agriculture

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Kiersten Wise

Possible Causes of Yellowing Alfalfa
2/16/2018 (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. | PPFS-AG-F-10
web only | 4 pages | - | 1 download | PDF: 754 kb

Holcus Leaf Spot
10/11/2017 (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. | PPFS-AG-C-6
web only | 3 pages | 483 words | 4 downloads | PDF: 889 kb

Diplodia Ear Rot
10/11/2017 (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. | PPFS-AG-C-5
web only | 3 pages | 514 words | - | PDF: 990 kb

Fungicide Efficacy for Control of Corn Diseases
9/28/2017 (new)

The Corn Disease Working Group (CDWG) developed ratings for how well fungicides control major corn diseases in the United States. The CDWG determined efficacy ratings for each fungicide listed in the table by field testing the materials over multiple years and locations. Ratings are based on the product's level of disease control and does not necessarily reflect yield increases obtained from product application. A product's efficacy depends upon proper application timing, rate, and application method as determined by the product label and overall disease level in the field at the time of application. | PPA-49
web only | 2 pages | 690 words | 9 downloads | PDF: 1,120 kb

Fungicide Efficacy for Control of Wheat Diseases
9/28/2017 (new)

The North Central Regional Committee on Management of Small Grain Diseases (NCERA-184) has developed the following information about fungicide efficacy for the control of certain foliar diseases of wheat for use by the grain production industry in the United States. The efficacy ratings for each fungicide listed in this table were determined by field testing the materials over multiple years and locations by the members of the committee. | PPA-48
web only | 2 pages | 649 words | 5 downloads | PDF: 1,400 kb