Category Archives: July 2017

What is Causing the Pre-mature Defoliation in Cotton?

by Dr. Tom Isakeit, Extension Plant Pathology; Dr. Gaylon Morgan, Extension Cotton Agronomist Cotton fields in Upper Coast counties of Texas that are experiencing browning or bronzing of the foliage (Figure 1), often accompanied by defoliation, usually have leaf spots.  There can be several different species of fungi associated with these leaf spots.  These are species of the genera Corynespora (Figure 2), Cercospora (Figure 3), Alternaria and Stemphyllium (Figure 4).  Some fields have leaf spots associated with one species only, while several species may be present in other… Read More →

Spray Drift Damage: What Injured Landowners Need to Know

by Tiffany Dowell Lashmet, Texas A&M AgriLife Extension Service Unfortunately, as many farmers know all too well, applications of various pesticides can result in drift and cause damage to neighboring property owners.  In the event this happens, it is important for an injured farmer to know what steps to take and what options are available to remedy the situation. First and foremost, the injured farmer should document any evidence, including taking photographs or samples of damaged crops or foliage, documenting wind speed, direction, temperature, and getting statements from… Read More →

How to Interpret Herbicide Mode of Action?

by Muthu Bagavathiannan, Spencer Samuelson, Josh McGinty, Peter Dotray, Gaylon Morgan Herbicide-resistant weeds are proliferating across Texas. One of the major causes of weed resistance is the use of the same herbicide over and over again without sufficient management herbicide diversity. It is critical that growers must integrate diverse chemical and non-chemical practices to reduce the selection pressure (represented by how quickly a rare resistant plant dominates a field) imposed by any single weed management tool. When multiple tools are used in combination, as opposed to a single… Read More →

How to Address Uneven Emergence in Cotton

by Seth Byrd, Texas A&M AgriLife Extension, Lubbock, TX. Many fields are just seeing some cotton emerge after rains moved across the Texas High Plains in late June.  This is most often the case in dryland fields where cotton was dry planted, or planted into soil with insufficient moisture to result in germination, or in a lot of cases, no moisture at all.  While this was done in hopes that rain would soon follow, for many fields it was over a month before a significant rain was received… Read More →

Insect Pest Management Update

by David Kerns, Professor & IPM Coordinator In cotton we have been seeing a great deal of bollworms activity in Bt cotton and there have been quite a few insecticide applications going out. A lot of these reports have been coming out of the Wharton and Corpus Christi areas, but it is not confined to just those locations. In the Brazos River Bottom, we had a field of WideStrike cotton that virtually had a worm in every terminal and as much as 40% fruit loss in the upper… Read More →