Category Archives: October 2020

Fall Concerns about Prussic Acid & Nitrate in Sorghums

Dr. Calvin Trostle, Extension Agronomy, TAMU Dept. of Soil & Crop Sciences, Lubbock, (806) 746-6101, ctrostle@ag.tamu.edu When our next Row Crops Newsletter is published in early November, a large portion of Texas will have seen heavy frost and a freeze on some sorghums.  So, this is good time to update Texas on prussic acid (a plant form of cyanide) and nitrates in sorghums.  These include sorghum/sudans (haygrazers), forage sorghums, and also grain sorghum where cattle will graze after harvest or on drought-failed grain sorghum (Fig. 1).  Sorghum after… Read More →

Cotton foliar symptoms in western Texas driven by weather, not disease

Reagan Noland, Assistant Professor and Extension Agronomist Tom Isakeit, Professor and Extension Plant Pathologist   Cotton across much of western Texas has recently displayed varying levels of premature defoliation and foliar discoloration following a drastic shift from hot and dry to abnormally cold and wet conditions in early September. The stark visual symptoms raised many questions and concerns regarding potential impacts to yield and quality, whether the situation could have been prevented, and whether intervention would have yielded any benefit. Producers and industry professionals have suspected foliar disease… Read More →