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Charles Rohla, Ph.D. News

Cross pollination is essential for pecan production

Adequate pollinators within the pecan orchard are imperative for optimal production.

Pecan Grafting: Texas Inlay Bark Graft, "American Method"

Dr. Charles Rohla, pecan researcher at Noble Research Institute, demonstrates a Texas inlay bark graft on a pecan tree seedling.

Fungicide and host resistance help control pecan scab

One of the most damaging diseases in pecans is pecan scab, caused by the fungus Fusicladium effusum. It infects actively growing tissue, such as stems, leaves and nut shucks, when temperatures are above 70 degrees Fahrenheit and relative humidity is above 90 percent.

Pecan alternate bearing challenges production

Pecan trees exhibit a strong tendency to produce a heavy crop one year, followed by one or more years of little to no production. This may best be characterized as alternate bearing with irregular symmetry.

Pecan Tree Grafting: Four- flap (Banana) Graft, "American Method"

Dr. Charles Rohla, pecan researcher at Noble Research Institute, demonstrates a four-flap (or "banana") graft on a pecan tree seedling.

Drought Stress on Pecan Trees

Drought conditions cause extreme stress on pecan trees. It is important for producers to understand the effects of drought and how pecan trees cope with the stress it brings.

Consider Pecan Management Decisions Over Coming Months

It is hard to believe that summer is almost upon us. This has the potential to be a heavy pecan crop year, if the drought has not hurt things too badly. To ensure a good crop, many management decisions need to be considered over the next few months, including proper fertilization and insect and disease control.

Pecan research moves into the 21st century

For decades, scientists have used molecular markers for research and breeding purposes to increase yields and water and nutrient efficiencies as well as disease and insect resistance in agricultural crops. Recently, pecan scientists have looked at the development of new technologies used in this research and considered its use in pecan breeding and research.

American Pecan Board establishes marketing order

The Federal Marketing Order was created to benefit the domestic and global pecan market.

Balanced fertilization program supports pecan growth

Fertilization is just one pecan management practice that helps maximize crop production and provides optimal tree maintenance. Proper fertilization encourages growth of shoots and leaves, which is essential for increasing crop load and decreasing tree stress.

Pecan Leaf Sampling

Nutrient management is essential for a successful pecan orchard or grove. With the high cost of fertilizer and the labor required for application, it is critical to accurately account for the nutrient needs of the tree for successful pecan management.

Research updates pecan tree fertilizer recommendations

Proper fertilization can decrease stress and improve the health and development of trees. Annual application of nitrogen and adequate levels of phosphorus have been shown to help reduce alternate bearing in pecan trees.

Trends prompt specialty ag center development

The Center for Pecan and Specialty Agriculture Development and Technology Advancement conducts research and demonstrations that will enhance production as well as educate producers and the community on opportunities in specialty agriculture.

Shaping Up Pecans with Irrigation

Installation of an irrigation system is one of the most important steps in establishing a new pecan orchard. Water is critical to produce healthy trees capable of optimal fruit production.

Federal Pecan Marketing Order aims to stabilize market

In 2015, I wrote about the proposed Federal Marketing Order (FMO) for pecans. On May 6, 2016, the U.S. Department of Agriculture announced that the order passed by an overwhelming majority of pecan...

How to Take a Pecan Leaf Test

It is critical to accurately measure the nutrient needs of pecan trees for successful orchard management. Leaf tissue can serve as an indicator of both limiting and excess nutrients. Charles Rohla,...

Pecan Production 101

Pecan is an important crop in the Southern Great Plains. Recent USDA crop statistics report 175,542 acres of pecans in Texas and 141,765 acres in Oklahoma, with the majority of the acreage consisting...

Assessing the Value of Pecan Trees

A set of plans provides detailed instructions for constructing a portable end wall for use with the Noble Research Institute 14-foot-wide by 7-foot-high portable polypipe high tunnel hoop house. With...

Watch Out for the Pecan Nut Casebearer

Pecan nut casebearer (PNC) is found throughout our pecan growing region and can be economically devastating to pecan producers. There are two to four generations of PNC per year with a new generation...