Farm & Ranch
El Niño development stalled out, but cool, wet winter still predicted
By: Robert Burns
Writer: Robert Burns, 903-834-6191, rd-burns@tamu.edu
COLLEGE STATION – Though this year’s El Niño is now predicted to be a weak one, it still spells more a chance of a wet, cool winter for most of Texas rather than a dry one, according to the Texas State Climatologist.
El Niño refers to warmer-than-average ocean water temperatures off the Pacific coast of South America, said Dr. John Nielsen-Gammon, state climatologist, College Station. A moderate to strong El Niño usually means more moisture to parts of the Southwest and Southeast during the late fall and winter. El Niño translates as “The Boy Child,” because it usually peaks about the time of Christmas.
“We’ve been waiting for El Niño to develop for about six months now, and it still hasn’t quite happened,” Nielsen-Gammon said. “Temperatures in the tropical Pacific have been running above normal for most of the period, and there’s still a great deal of warm water beneath the surface. So the odds still favor at least a weak El Niño developing over the next couple of months and lasting through most of the winter.”
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Nielsen-Gammon said it doesn’t really matter whether the official El Niño criteria of “warm enough for long enough” are met. It will still affect Texas weather at least somewhat.
“The expectations from the Climate Prediction Center, based on simulations and past history, are that the chances are more likely of having a cool, wet winter rather than a warm, dry one,” he said.The reason for this optimism, Nielsen-Gammon said, is that the warmer temperatures in the tropics tend to drag the jet stream farther south than normal.
“Since Texas is already normally sitting south of the jet stream in the winter time, this brings us more into the path of winter storms,” he said. “Somewhat paradoxically, even though it may be a cool winter, it’s not supposed to bring any of those remarkably cold spells because in general the jet stream won’t be going far enough north to drag any Arctic air masses down this far.”
This means more cloudy, rainy winter weather, “which many people might find annoying, but that will be good for agricultural production and bring some relief to the drier parts of the state,” Nielsen-Gammon said.
More information on the current Texas drought and wildfire alerts can be found on the AgriLife Extension Agricultural Drought Task Force website at http://agrilife.tamu.edu/drought/ .
Central: Most counties reported soil moisture, rangeland and pastures, as fair. Overall, most crops were in good condition, as were livestock. The region received good rains during the weekend, along with cooler weather, which will slow or stop Bermuda grass growth even with the good soil moisture. The pecan harvest was well underway, with very good quality reported. The cotton harvest was winding down in all areas. Producers continued to plant winter wheat and oats, and were seeing good emergence so far. Wheat and oat planting usually continues from October through November. Some producers planned to plant after Nov. 15 to avoid Hessian fly infestations. A few producers were already grazing stocker cattle on some oat fields. Despite the rains, the Blacklands region remained drier than normal for this time of year.
Coastal Bend: Soil moisture was good. Rain delayed the last of the cotton harvest, cotton stalk destruction and hay harvesting in many areas. Fall fieldwork, such as disking and bedding, continued throughout the week on fields that had dried out enough. Planting of winter pastures began last week, with continued planting activity expected through early November. Forage producers continued to scout for armyworms. Because of current conditions, some johnsongrass fields tested positive for prussic acid. Early varieties of pecans were being harvested. Livestock were in fair condition.
East: Cooler temperatures halted warm-season forage growth throughout the region. Some hay production was still in progress, but producers were having trouble curing cuttings because of cold nights and morning dews. Hay sales were slow. Producers continued to plant cool-season forages. Topsoil and subsoil moisture were adequate in most counties. Wood County continued to report short both topsoil and subsoil levels. Cereal rye seed was scarce and expensive, and some producers were using seed blends to decrease the per-acre planting cost. Shelby and San Augustine counties reported more than 3 inches of rain. Flash floods with erosion were reported in Trinity County where 4 inches of rain fell. Weaning of calves and culling of herds continued. Livestock remained in good body condition. Armyworms were present. Feral hogs were active, with damage reports rising. Pecan scab reports increased.
Far West: Warm days and cool nights were the norm for the week. Presidio County had their first freeze on Oct. 14. Subsoil and topsoil moisture ranged from adequate to very short. Corn was more than 70 percent harvested. Upland cotton was in good to excellent condition, with most fields having open bolls and from 5 to 15 percent harvested. Nearly all grain sorghum was mature. From 60 to 75 percent of winter wheat was planted. Pastures and rangeland were in fair to poor condition. In El Paso County, 60 percent of Pawnee variety pecans and 10 percent of Western had open shucks.
North: Topsoil moisture was mostly adequate, with some counties reporting surplus. From 2 to 3 inches of rain fell throughout the region. Low temperatures dropped to the mid-60s with the storms. The hay harvest was winding down due to lower nighttime temperatures that slowed warm-season grass growth. The rains delayed planting of winter wheat, oats and winter pasture grasses for a few days. What had been planted before the rain had mostly emerged. Overall, cattle were in good condition, but up-and-down weather patterns were causing them stress. Feral hogs continued to cause damage.
Panhandle: Temperatures were near average for the region. Soil moisture was rated mostly adequate, with a few areas reporting short. The Collingsworth County peanut harvest was nearly done, with yields and grades on irrigated peanuts above average. Cotton producers were spraying defoliants, and harvest should be in full swing in some counties this week. Wheat had pressure from fall armyworms, and many producers were spraying. Deaf Smith County producers were harvesting corn and corn silage. Grain yields were above average, with many acres yet to be harvested. Dryland grain sorghum was ready for harvest, as were sunflowers. In Hansford County, the corn harvest was about over, but a little late-planted corn still needed to be cut. Most of the soybeans had been harvested there, with the average yield about 60 bushels per acre. Ochiltree County wheat planting was winding down. The Randall County corn harvest was complet ed, and yields were about average. The Randall County grain sorghum harvest was just beginning, with yields slightly above average at about 4,000 pounds per acre. Last week, Gray County received a mixture of rain, large hail, high winds and a tornado. Corn was lodged in some areas, cotton stripped of leaves and bolls, and grain sorghum seed heads blasted. Some cotton was not expected to recover.
Rolling Plains: Cotton harvesting was about to begin in some areas where producers had already defoliated. Temperatures continued to stay warm enough to help cotton finish maturing. The region remained dry. Some wheat was emerging but stands were skimpy. Armyworms were infesting early planted wheat. Pastures and rangelands were thriving on past rains in some areas; in others, pastures were drying out and turning brown. Hay was available for sale, and prices were reasonable for those who needed to provide supplemental feed. Livestock were in fair to good condition. The pecan harvest began, but was not yet in full swing. Stock tanks and lakes still needed runoff water.
South: Daytime temperatures were mild with cool nights. Only Brooks County reported a light rain. Rangeland and pastures were in good condition. In the northern part of the region, peanut harvesting was in full swing, hay cutting and baling continued, and wheat and oat crop producers continued planting. Fall armyworms were reported on improved Bermuda grass pastures in the McMullen County area. Grazing conditions improved in many areas, but additional forage production was needed during the next couple of weeks in order to have adequate grazing for the winter season. Cattle body condition scores improved with most herds in fair condition. Soil moisture was mostly short throughout the area, with the exception of Atascosa County where it was 90 to 95 percent adequate. In the eastern part of the region, oak trees appeared to be slowly recovering from the drought. Landowners continued to supplement wildlife and cattle. Fall ar myworms were a big problem throughout Kleberg and Kenedy counties. Soil moisture was 60 to 80 percent adequate in Brooks County, 50 percent adequate in Jim Hogg County, and 60 percent short in Jim Wells, Kleberg and Kenedy counties. In the western part of the region, coastal Bermuda grass growth slowed because of cooler temperatures and lack of rain. Stock-tank water supplies remained good with low evaporation rates, and ranchers continued trying to rebuild herds. In Zavala County, dry conditions kept producers busy irrigating recently planted wheat, oats, onions, cabbage and spinach. Pecan harvesting was light, cotton ginning continued at two facilities, and supplemental feeding was minimal. Also in Zavala County, cooler temperatures stimulated growth of cool-season grasses and forbes on native range and pastures. Soil moisture ranged from about 60 percent adequate to 100 percent very short. In the southern part of the region, most Cameron County fields remained too wet to work. F all corn was progressing well, forages were good, as were livestock. In Starr County, fall vegetable crops were progressing well, and hay baling continued, though there were reports of armyworms. Soil moisture ranged from 100 percent adequate to 80 percent short.
South Plains: Bailey County had a light frost with temperatures at 31 degrees for one hour on Oct. 14, but very little freeze damage occurred. Soil moisture was dropping due to higher temperatures and recent winds. The silage and corn harvests continued, as well as the grain sorghum harvest in some counties. Early planted crops were already out of the field, but later-planted fields needed a couple more weeks before ready. Peanuts were being dug and combined. Pasture and rangeland remained in good condition. Producers were starting to defoliate cotton in preparation for harvest. However, there were still a large number of cotton acres that needed another week or two before they will be ready. Cotton gins took in a first few bales over the weekend. Lubbock County received very light, spotty showers this week, with cotton harvesting beginning there. No reports of grades were received from the Lubbock classing office yet . Wheat was rapidly progressing thanks to good soil moisture. Swisher County producers continued to harvest haygrazer and grain sorghum. Test weights across the county were considerably lower than predicted.
Southeast: Soil moisture was mostly in the adequate to surplus range, with Brazos and Hardin counties reporting 100 percent adequate. Rangeland and pastures varied from fair to good, with fair ratings being the most common. Livestock were in good condition. With the recent dry weather conditions in Brazoria County, hay cutting and baling was anticipated to increase. The rice harvest in Chambers County was over except for a few late-planted fields. The ratoon – second crop – rice looked very good, though warm weather was needed to keep the crop progressing. A side note to the expected good second crop was there was already lack of storage for the first crop. With the market sluggish and the lack of grain being sold, there was a back-up at the dryers and mills. In Montgomery County, the seasonal temperatures and no rainfall allowed for winter annual pasture plantings begin. Armyworms are affecting warm-season pastures.
Southwest: Fall conditions were above average, but the warmer weather helped grow some much needed grass for grazing. Rangeland and pastures were in very good shape. However, there were major outbreaks of armyworms in small grain and improved pastures. White grubs also infested some newly planted small grain fields. Lots of winter weeds emerged after earlier rains. The condition of wildlife and livestock was on the upswing. Quail numbers and deer antler growth looked good. However, deer body condition scores were below normal but improving.
West Central: Days were warm with cool nights, and many areas received rain over the weekend. There was some hail damage to cotton in the northern tier of counties. Producers were planting small grains. Wheat sowing was well underway. Cotton was rapidly maturing, and most fields were sprayed with defoliant. In general, cotton harvesting should start in the next few weeks. Some early planted cotton was already harvested with reports of above average yields. Armyworms infested many small grain fields. Some producers were able to take another cutting of hay due to the recent rains and warm temperatures. Rangeland and pastures were in good condition as the recent rains helped improve growth of winter grasses and forages. Livestock remained in fair to good condition. Stock-tank water levels continued to decline and were becoming a concern. The pecan harvest should pick up in the next few weeks. Some hand harvesting was already underway on smaller, younger trees.
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Farm & Ranch
Frog Fruit
By Tony Dean, tonydean.tx1@gmail.com
Frog fruit is a native, low-growing perennial forb adapted to most of the eastern U.S., but few grazers know it well. It contributes more to our plant communities than we realize. It generally grows no more than a few inches tall and roots at the nodes. It can form dense mats several feet across and develop runners up to 3 feet long.
The leaves are thick, one to two inches long and 3/8 inch wide, and toothed from the middle to the tip. Tiny white flowers form a ring around a flower head, and the head then elongates into a cylinder an inch long or longer. Frog fruit has a four-angled stem.
Frog fruit can grow almost anywhere in Texas and on many soil types. It can grow in drier soils and likes good drainage, but it needs additional moisture to survive the hottest months. You can find it almost anywhere in a pasture, though it often grows in depressions and near water sources.
“Frog fruit is used as forage by livestock and deer. I recall an instance when I was moving cattle from one pasture to the next on a Jack County ranch. As I opened the gate, I stood by a beautiful green plant of switchgrass which I expected to be immediately grazed down. The cattle walked right by the switchgrass and stuck their heads in a small patch of frog fruit a few feet away,” Dean said.
Frog fruit is gaining popularity as a ground cover for homes and gardens for these reasons:
- Frog fruit grows quickly, maybe too quickly. If it gets out of bounds, you can always trim it back.
- Frog fruit is low maintenance. Once you get it established with adequate watering, it can survive with little care.
- Frog fruit has a long bloom period, from April to October.
- It is a host plant for several butterfly species and other insects.
Farm & Ranch
Theileria orientalis
By Barry Whitworth, DVM
Over the past few years, veterinarians have detected Theileria orientalis in Oklahoma cattle. Early cases were primarily diagnosed in adult cattle, but more recent Oklahoma cases have been identified in stocker cattle. All cattle producers should be familiar with the clinical signs of this disease and check their cattle daily for signs of trouble.
The first U.S. case of theileriosis was identified in Virginia in August 2017. Those cattle showed weakness and anemia, and veterinarians made an initial diagnosis of anaplasmosis. Blood samples from the animals were tested for Anaplasma, Babesia and Leptospira. Results were negative for all three, but the tests revealed a blood protozoan, later identified as T. orientalis genotype Ikeda. Since that first herd outbreak, the organism has been detected in several states.
Cattle sick with T. orientalis genotype Ikeda may show fever, weakness, anorexia and exercise intolerance. If forced to move, affected cattle may stagger and gasp for air. If stressed excessively, they may collapse and die. On examination, the gums, eyes or vaginal mucosa may appear pale (white) or yellow. Reproductive losses, including stillbirths and late-term abortions, may occur, along with a drop in milk production.
Clinical signs reported in adult cattle in Oklahoma include anemia, sudden death, weight loss, abortion, failure to thrive and failure to calve. In stocker cattle, producers have reported weight loss, anemia, poor performance and sudden death.
Because Anaplasma marginale and T. orientalis genotype Ikeda produce similar clinical signs, telling the two apart can be difficult. One difference is that clinical signs are more common in young cattle infected with T. orientalis than in young cattle infected with A. marginale. Cattle with anaplasmosis also often display aggression, while those with T. orientalis genotype Ikeda typically do not. A laboratory test is required to tell the two diseases apart with certainty.
Researchers have identified Haemaphysalis longicornis as a possible vector of T. orientalis genotype Ikeda. In 2017, the U.S. Department of Agriculture’s (USDA) National Veterinary Services Laboratories (NVSL) confirmed the presence of H. longicornis, commonly called the Asian longhorned tick (ALT) or bush tick. While trying to determine how the tick arrived in the United States, USDA officials discovered it had been present in West Virginia as early as 2010. The tick has now been confirmed in at least 26 states, including Oklahoma. Some evidence suggests other insect vectors may also transmit T. orientalis genotype Ikeda. Needle transfer is another possible route of transmission.
The ALT has been identified in Craig and Mayes counties in Oklahoma. This tick thrives in areas with high humidity, such as wooded regions, brush or tall grass. Ticks are often found where large numbers of wildlife gather, such as along deer trails. Producers can find more information about the ALT on the USDA website at https://www.aphis.usda.gov/livestock-poultry-disease/cattle/ticks/asian-longhorned.
Other countries have developed treatments for T. orientalis, but no approved treatments are available in the United States, and no vaccine exists for this disease. The best defense is prevention: buying cattle free of the organism, avoiding blood transfer between animals and using effective tick control. Producers should purchase cattle from reputable sources. Clean instruments between animals during procedures such as castration or dehorning, and change needles between every animal. Control external parasites with appropriate insecticide treatments. Pasture management also helps, such as rotating cattle away from wooded or brushy areas where ticks thrive. Patch burning may also help reduce tick populations.
Theileria orientalis remains a concern for some cow/calf and stocker producers in Oklahoma. Producers who want more information about T. orientalis genotype Ikeda should contact their local veterinarian or Oklahoma State University County Extension agriculture educator.
References
Hammer, J. F., Emery, D., Bogema, D. R., & Jenkins, C. (2015). Detection of Theileria orientalis genotypes in Haemaphysalis longicornis ticks from southern Australia. Parasites & Vectors, 8, 229.
Oakes, V. J., Yabsley, M. J., Schwartz, D., LeRoith, T., Bissett, C., Broaddus, C., Schlater, J. L., Todd, S. M., Boes, K. M., Brookhart, M., & Lahmers, K. K. (2019). Theileria orientalis Ikeda genotype in cattle, Virginia, USA. Emerging Infectious Diseases, 25(9), 1653-1659.
Spickler, Anna Rovid. (2019). Theileriosis. Retrieved from http://www.cfsph.iastate.edu/DiseaseInfo/factsheets.php.
Watts, J. G., Playford, M. C., & Hickey, K. L. (2016). Theileria orientalis: A review. New Zealand Veterinary Journal, 64(1), 3-9.
Farm & Ranch
Is the Pond Safe for Livestock?
By OKFR Staff
During the hottest part of summer, a farm pond can look like a welcome source of water. Cattle may be standing belly-deep along the bank, and the pond may still hold enough water to seem dependable. Looks alone won’t tell you whether that water is safe.
Hot weather, limited rainfall and falling pond levels can create water-quality problems. As water evaporates, salts, minerals, nutrients and other substances become more concentrated. Warm, still water can also encourage blue-green algae, and some forms can produce toxins capable of killing livestock.
Producers sometimes treat water as an afterthought compared to grass, hay and supplemental feed. Livestock need a dependable supply of clean water to maintain feed intake, regulate body temperature and support production. Poor-quality water can reduce consumption and performance even when it does not cause obvious poisoning.
A pond that has watered cattle for years is not safe under every set of conditions. Pay particular attention during drought, extreme heat or any period when the water level drops significantly.
Watch the Water and the Livestock
One of the most serious late-summer concerns is a bloom of cyanobacteria, commonly called blue-green algae. These organisms live naturally in many bodies of water, and most do not produce dangerous toxins. The risk rises when certain toxin-producing species multiply rapidly under favorable conditions.
According to Oklahoma State University Extension, toxic blue-green algal blooms typically develop in standing water after periods of hot, dry, calm weather. Nutrients such as nitrogen and phosphorus can fuel excessive growth. Those nutrients may reach a pond through manure, fertilizer runoff, soil erosion and decaying vegetation.
A suspicious bloom may turn the water bright green, blue-green, pea-soup green or even brownish. Scum, foam or mats may collect along the shoreline, particularly where the wind pushes floating material into one area. Some blooms look like spilled paint.
Not every green pond is poisonous. Common aquatic plants and harmless algae can also change the color or surface of the water. You usually cannot tell whether a bloom is toxic by looking at it, and a pond can contain toxin-producing cyanobacteria without showing every commonly described warning sign.
Keep livestock, horses, pets and people away from water that has an unusual color, heavy surface scum, a bad odor or unexplained dead fish or wildlife nearby. Do not let livestock drink from another part of the same pond on the assumption that the water is safe there. Wind can move a bloom, and toxin levels may vary across the pond.
Blue-green algae can produce toxins that affect the nervous system or liver. Depending on the toxin and the amount consumed, affected animals may develop weakness, staggering, difficulty breathing, tremors, convulsions, diarrhea or collapse. In severe cases, owners find animals dead near the water before realizing anything is wrong. Treatment often fails, which makes prevention especially important.
Treat any suspected poisoning as an emergency. Move the herd away from the water source without driving or stressing animals that may already be affected. Provide another clean water supply and contact a veterinarian immediately. Your county Extension office can also help you determine where and how to submit a water sample.
Blue-green algae is not the only potential problem. Pond water may contain elevated levels of dissolved salts, sulfates, nitrates, bacteria or other contaminants. Runoff can carry manure, fertilizer, pesticides and organic matter into the pond. Low water levels make some of these problems worse because the remaining water grows more concentrated.
Water with excessive dissolved solids may taste bitter or salty, so animals drink less of it. Depending on the substances involved and their concentrations, poor-quality water may contribute to diarrhea, reduced feed intake, poor weight gain or other health concerns. Young animals and livestock that are not used to the water may be more vulnerable.
Watch the cattle themselves, too. Are they reluctant to drink? Are they crowding around a different water source? Has feed intake or weight gain dropped without an obvious explanation? Are several animals having digestive problems? Changes across multiple animals can be an early clue that you need to look at the feed or water.
OSU Extension recommends collecting a representative sample and submitting it for a livestock water test whenever you suspect a water supply is harming animal health or performance. A standard livestock water test covers several characteristics, but blue-green algae can require different sampling and testing procedures. Contact the laboratory or county Extension office before collecting the sample so you take it from the right location, use the proper container and handle it correctly.
Reduce Problems Before They Develop
Good pond management cannot eliminate every water-quality problem, but it can lower the risk. One of the most effective steps is limiting the manure, soil and nutrients that enter the water.
Cattle with unrestricted access to an entire pond can damage the banks, muddy the water and deposit large amounts of manure in or near it. Hoof traffic strips vegetation and speeds erosion. Sediment fills the pond over time, while manure supplies nutrients that can encourage excessive algae growth.
Where practical, fence livestock away from most of the pond and provide a limited-access watering point. Another option is piping water to a trough below the dam or elsewhere in the pasture. OSU notes that reducing cattle manure in the pond can reduce the conditions that favor toxic algae and make the water more palatable.
A vegetated buffer around the pond can slow runoff and trap soil and nutrients before they reach the water. Apply fertilizer and manure carefully in the watershed, particularly before heavy rain, and do not let large amounts of hay, feed or organic debris pile up at the water’s edge.
Alternative watering systems need maintenance, too. Check troughs for algae, manure, drowned animals and other contamination. Install wildlife escape ramps in tanks so birds and small animals can climb out instead of drowning and fouling the water.
Be cautious about treating a pond on your own. Some owners use copper sulfate and other algaecides for algae control, but improper treatment can create new problems. Killing a large amount of algae or aquatic vegetation at once can deplete dissolved oxygen as the material decomposes, which can lead to a fish kill. Treatment may also release toxins from affected cyanobacteria into the water. Base any chemical application on proper identification and professional recommendations, not guesswork.
Livestock should always have enough water for the weather, their size and their stage of production. Demand rises sharply in hot weather, and a pond that barely meets the herd’s needs in spring may fall short in August. Check the source regularly instead of waiting for cattle to gather around a muddy shoreline.
Ponds can fool you. Crystal-clear water isn’t always safe, and a green pond doesn’t always mean toxic algae. Regular observation, testing and prevention are the best ways to keep a pond safe for your herd.
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