ID-125: A Comprehensive Guide to Wheat Management in Kentucky

Bill Bruening, J.D. Green, John Grove, Jim Herbek, Don Hershman, Doug Johnson, Chad Lee, Jim Martin, Sam McNeill, Michael Montross, Lloyd Murdock, Doug Overhults, Greg Schwab, Lee Townsend, Dick Trimble, Dave Van Sanford | Feb. 23, 2016 (Reprinted)

The soft red winter wheat grown in Kentucky is the fourth most valuable cash crop in the state. Winter wheat has been an integral part of crop rotation for Kentucky farmers. Wheat is normally harvested in June in Kentucky and provides an important source of cash flow during the summer months.

---

PPFS-AG-S-24: Soybean Cyst Nematode Management Recommendations for Kentucky, 2015

Don Hershman | Nov. 1, 2014 (Reviewed)

SCN-resistant soybean varieties are an essential tool in the management of SCN. Although some of the early resistant varieties lagged behind susceptible varieties in yield, newer resistant varieties adapted for use in Kentucky do not suffer the same yield penalty. In fact, in the absence of SCN, it is common for modern SCN-resistant varieties to out-yield the best susceptible varieties in university research trials.

---

PPFS-AG-R-1: Winter Decline Syndrome of Canola

Don Hershman, Carrie Knott | Sep. 1, 2014 (New)

Interest in producing canola in Kentucky has greatly increased in recent years. Many farming operations wish to diversify their production systems with different row crops that require little to no additional equipment or infrastructure costs; canola is such a crop. Additionally, newer canola cultivars have improved agronomic traits, including winter hardiness. Lastly, more stable markets in Kentucky have greatly increased the profitability of canola.

---

PPFS-AG-S-9: Sampling Soybean Fields for Soybean Cyst Nematode Analysis

Don Hershman | Jan. 1, 2014 (Minor Revision)

The soybean cyst nematode (Heterodera glycines, SCN) causes many millions of dollars worth of damage to Kentucky soybean fields each year. This occurs even though damage is mostly preventable and controls are inexpensive. This situation exists because a large number of soybean producers are unaware that cyst nematode is damaging their crops. In most cases soybean cyst nematode will cause significant yield reductions without producing any detectable symptoms in soybeans. When symptoms do occur, they are frequently thought to be associated with some other factor, such as soil compaction or low soil fertility.

---

PPFS-AG-S-19: Soybean Foliar Spots and Blights

Don Hershman | May. 1, 2013 (Minor Revision)

Soybean foliage is susceptible to a number of fungal and bacterial pathogens. These pathogens cause leaf spots and blights and are generally common in Kentucky; however, few fields in any given year are seriously damaged by foliar diseases. Crop rotation and weather that is unfavorable to disease typically keeps foliar diseases at low levels. Occasionally an extended period of wet and humid weather in July to early August will result in significant amounts of foliar disease and yields may be seriously affected. However, this scenario is relatively uncommon in Kentucky.

---

PPFS-AG-S-3: Downy Mildew of Soybean

Don Hershman | Sep. 1, 2012 (Minor Revision)

Small, irregular spots on upper leaf surfaces are initially pale yellow in appearance, later becoming gray-brown with a yellowish margin. On the underside of the leaves, the spots have a gray, fuzzy appearance due to the presence of the pathogen. These fungal-like tufts are reproductive structures of the organism and their appearance is diagnostic for this disease. Symptoms frequently occur at low levels throughout the crop canopy. Early leaf spots are non-descript and are commonly confused with leaf spots and pustules caused by soybean rust.

---

PPFS-AG-S-4: Phytophthora Root and Stem Rot of Soybean

Don Hershman | Jul. 1, 2012 (Minor Revision)

Phytophthora root and stem rot (PRSR), caused by Phythophthora sojae, is infrequently encountered in Kentucky. However, where it does occur, the disease can be quite destructive. Soon after planting, P. sojae can cause damping-off of germinating seeds and/or young seedlings. Severe stand loss often necessitates replanting. Alternately, this pathogen can infect and kill established plants of susceptible soybean varieties any time during the season. Varieties that have some resistance to P. sojae may be stunted, but rarely die. PRSR is primarily a problem in poorly drained fields (due to high clay content, "hard pan," and/or soil compaction) or areas of fields that are prone to flooding.

---

PPFS-AG-S-1: Brown Spot of Soybean

Don Hershman | Jun. 1, 2012 (Minor Revision)

Brown spot, caused by the fungus Septoria glycines, is present in all soybean fields in Kentucky. In most years the disease causes little to no yield impact; however, up to 15% yield losses can occur in select environments. For example, brown sport tends to be worse where soybeans follow no-till soybeans, where early-maturing varieties are planted, and/or when fields are planted in late April. River bottom fields or fields subject to fog or morning shade are frequently impacted.

---

PPFS-AG-SG-8: Wheat Streak Mosaic Virus (WSMV) in Kentucky

Don Hershman | Jun. 1, 2012 (Minor Revision)

Wheat streak mosaic (WSM) is a potentially devastating virus disease of wheat. In the United States, WSM is most prevalent in hard red wheat grown in the central Great Plains region. Soft red winter wheat produced in the mid-south and Midwest is infrequently impacted by WSM. Epidemics are rare in Kentucky with the only recorded ones occurring in 1989 and 2000.

---

PPFS-MISC-6: Assessing Foliar Diseases of Corn, Soybeans, and Wheat: Principles and Practices

Don Hershman, Paul Vincelli | Nov. 1, 2011 (New)

This publication provides basic information on how to conduct disease assessments in on-farm trials. The focus is on foliar diseases, since root diseases are much more difficult to assess properly. The publication begins with fundamentals of proper design of field trials.