by Mark Mauldin | May 10, 2015
Cogongrass seedheads are easily spotted this time of year.
Photo Credit: Mark Mauldin
We are well into spring and a wide variety of plants are showing off their colorful blooms. As lovely as most of the blooms are, some springtime colors are an unwelcome sight. Such is the case with the showy, white seedhead that is produced by Cogongrass (Imperata cylindrica). The presence of Cogongrass – a highly aggressive, invasive, perennial – in Florida is not news; it has been in Florida since at least the 1930’s. However, the white seedhead that it produces in the spring makes it easier to locate and identify. When the seedhead is not present, the somewhat boring looking grass has the ability to blend in with its surroundings. This makes it harder for un-expecting landowners to identify the new/small infestations which are much easier to eliminate than are larger, well established infestations.
While cogongrass spreads primarily by rhizomes the seedheads can make new infestations easier to find.
Photo Credit: Mark Mauldin
Controlling cogongrass is not easy but it is necessary. If left uncontrolled cogongrass will continue to aggressively spread, displacing other desirable vegetation. Generally speaking, control is a multi-year process. Because the specific recommendations for controlling cogongrass can vary somewhat by situation it is highly advisable that you contact a UF/IFAS Extension Agent in your county if you suspect that you have cogongrass on your property.
The following description of cogongrass from UF/IFAS Center for Aquatic and Invasive Plants should help you identify cogongrass, even if the seedheads are gone.
“Cogongrass is a perennial that varies greatly in appearance. The leaves appear light green, with older leaves becoming orange-brown in color. In areas with killing frosts, the leaves will turn light brown during winter months and present a substantial fire hazard. Cogongrass grows in loose to compact bunches, each ‘bunch’ containing several leaves arising from a central area along a rhizome. The leaves originate directly from ground level and range from one to four feet in length. Each leaf is 1/2 to 3/4 of an inch wide with a prominent, off-center, white mid-rib. The leaf margins are finely serrated; contributing to the undesirable forage qualities of this grass. Seed production predominately occurs in the spring, with long, fluffy-white seedheads. Mowing, burning or fertilization can also induce sporadic seedhead formation. Seeds are extremely small and attached to a plume of long hairs.”
This is the time of year when cogongrass is the easiest to identify. Take advantage of this opportunity to locate new infestations and work with your county agent to develop a control plan. Once a plan is in place, follow it to the end. Stopping after the first year will practically ensure that control will not be achieved.
A relatively new patch of cogongrass recently found in Washington County.
Photo Credit: Mark Mauldin
More information on cogongrass can be found by following the links below
by Mark Mauldin | Apr 17, 2015
Monitor your ponds closely throughout the spring and make any necessary herbicide applications before weed growth becomes too excessive.
Photo Credit: Mark Mauldin
Similar to Goldilocks’ porridge, water temperature doesn’t need to be too hot or too cold, it needs to be just right for using aquatic herbicides (70o – 80o F). Here in Florida, these optimum water temperatures occur in the spring. Water temperature largely regulates the growth of most aquatic weeds; cool temperatures slow or stop growth and warm temperatures promote growth. Keeping this simple principle in mind can help determine when to use aquatic herbicides.
Generally speaking, aquatic herbicides are not used when water temperatures are below 60o F. When water temperatures are this cool most aquatic weeds are not actively growing. For herbicides to be effective the target plants must be actively growing. Applying herbicides too early in the spring is generally not an issue because winter dieback can make many aquatic weeds hard to find when water temperatures are cool. The weeds are out of sight and out of mind. The much more common issue is waiting too long before attempting to control weeds.
As water temperatures climb above 60o weeds begin to grow. Unfortunately, they often times grow unnoticed throughout the spring until they become completely out of control in the summer. By this point, control, even using herbicides, is a monumental task. If at all possible, control weeds early in the growing season.
As plants grow they are able to build up energy reserves, making them more difficult to control. The longer they are allowed to grow the stronger and more difficult to control they become. Controlling weeds earlier in the growing season eliminates this problem.
Similarly, as the growing season progresses plants produce more and more biomass. If an herbicide is applied and the weeds are killed large amounts of decomposing plant material in the water can cause problems. The decomposition process uses oxygen; dissolved oxygen can drop to levels that are hazardous to fish and other aquatic species. The more plant material that is present when herbicides are applied the bigger concern this becomes. Applying herbicides earlier in the growing season, before large amounts of biomass are produced, can help lessen this problem.
Aquatic weeds can grow rapidly when temperatures are warm. Don’t let them get out of control before you begin control efforts.
Photo Credit: Mark Mauldin
Further compounding the issue, warm water is physically able to hold less dissolved oxygen than cooler water. Late in the summer pond water can be very warm with low concentrations of dissolved oxygen even before large amounts of decomposing plant material are added.
To help reduce the risk of oxygen depletion never treat more than ½ of a pond at one time, if weed growth is already substantial treat no more than 1/3 of a pond at one time and always allow 10 -14 days for oxygen recovery between treatments. Also, avoid treating on cloudy days, another factor that can lead to lowered dissolved oxygen.
Aquatic weed control will be easier and more effective if you monitor your pond throughout the spring and make any needed herbicide applications early, before the weeds have grown too large and the water is too warm. Consult your county extension agent for assistance determining what aquatic weeds you have and if treatment is necessary. Always read and follow all label directions when using any herbicide.
by Mark Mauldin | Dec 5, 2014
Deer grazing test plots at the NFREC in Quincy. Quality food plots take effort and planning.
Deer hunting season has begun in Northwest Florida. As hunters venture into the woods and sit for hours on end they have plenty – sometimes too much – time to contemplate what they could have done or should do to make there hunting experiences better. These plans for improvement may involve all kinds of things; if they involve improving underperforming food plots allow me to offer a few points for contemplation.
- Are your plots the optimum size? Small plots, less than one acre, don’t stand much of a chance. If you plant something deer like and there is a substantial deer population in the area the young plants will be “mowed” down before they have time to establish. At best, you’ll create a low growing green carpet. This might make you feel better as a hunter but it’s doing very little in the way of providing nutrition to the deer herd. Deer will get the maximum benefit from multiple plots (2-3 acres in size) that total around 10% of the area you are managing. This scenario is ideal for the deer, it might not be ideal or even feasible for the hunter.
- Are your plots properly fertilized? This is a very common issue with underperforming food plots. That bag of 10-10-10 really doesn’t do much. Hunters who have no farming experience are often amazed and disheartened at how much fertilizer it takes to produce a crop – food plots are simply forage crops. Consult your county’s agriculture agent for assistance with soil testing and fertilizer recommendations for the specific crops you are producing. UF/IFAS fertilizer recommendations for forage crops reference additional applications after a grazing rotation or haying; how does this translate for food plot management? A cool season food plot planted in mid-October will be productive for about six months. During that six months you should apply Nitrogen at least three times, Potassium twice, all required Phosphorus can be applied at planting. This steady supply of nutrients keeps the food plot going throughout the entire growing season. Using slow release or enhanced efficiency fertilizers can simplify this process somewhat, since the number of applications is reduced.
Soil testing and the resulting fertilizer recommendations are key to successful food plots.
- Did you plant the right crop at the right time? There are lots of choices when it comes to selecting what to plant in your food plots remember plant varieties that are suited to your particular environment not the one that have the prettiest packaging or the most TV commercials. Planting time can be an issue; when cool season crops are planted too late they are unable to establish enough roots and top growth to withstand grazing pressure through the middle of winter when short days and cold temperatures greatly slow growth rates. Even if planted at the correct time most “winter” forages produce the majority of their biomass in the spring, once day length begins to increase.
Hopefully considering these points will help you to improve your food plots. Remember, producing high quality food plots can be a challenging endeavor but the process makes more sense and is less frustrating if you view food plots as long term habitat improvement designed to provide additional nutrition to the deer herd not simply an attractant during hunting season. For more information on any of the topics addressed contact your county’s UF/IFAS Extension Agriculture or Natural Resources Agent.
by Mark Mauldin | Jun 6, 2014
Excess aquatic weeds can be a source of frustration for pond owners.
Privately owned ponds and lakes are common across the Panhandle. Ponds can be a source of great enjoyment and frustration for their owners. When all is well a pond is a welcome addition to most any landscape. However, when problems arise pond owners are often times at a loss for how to rectify the situation. Unwanted or excess weeds in a pond is a one of the most common frustrations for pond owners. Luckily, aquatic weed control, an otherwise daunting task, can be manageable if some basic principles are understood.
UF/IFAS extension faculty from Calhoun, Holmes, Jackson, and Washington counties will be presenting a workshop on Thursday, June 12th to help educate pond owners regarding some of the principles of effectively controlling unwanted weeds in their ponds. Topics covered will include pond weed identification, weed control options, aquatic herbicide selection and application, and the use of grass carp for weed control.
The workshop will be held in Chipley at the Washington County Agricultural Center, starting at 6:30 the evening of the 12th. There is a $5 registration fee for this event. Space is limited so early registration is highly encouraged. To register call the Washington County Extension Office at (850)638-6180 or email Mark Mauldin mdm83@ufl.edu
by Mark Mauldin | Mar 21, 2014
Deer grazing test plots at the NFREC in Quincy. Food plots can benefit deer year round, not just during hunting season.
To the chagrin of hunters across the panhandle deer season has drawn to a close. As the days lengthen and temperatures begin to climb, many of the area’s outdoorsmen (and women) shift their focus to a more aquatic nature. However, those sportsmen, who will place a premium on antler size in the fall, should not neglect the nutritional needs of the deer herd during the spring and summer months.
There is a well-documented correlation between deer nutrition and antler growth. Antler growth is suppressed when adequate nutrition is not available. Antler growth requires a large amount of energy and protein. The energy requirements for antler growth can generally be met by the deer’s natural environment. However, some natural environments may not supply enough protein to maximize antler growth. Nutrition is only one of several factors effecting antler growth but it is perhaps the easiest of those factors to alter.
Source: Mississippi State University, Forest & Wildlife Research Center
http://www.fwrc.msstate.edu/pubs/antler.pdf
As with all animals, a deer’s nutritional demands change over time. The suppressing effect of insufficient protein in the diet is most evident in younger bucks. This is because the bodies of immature deer are still growing. The processes of growth and development demand protein. When antler growth is added to the equation the protein demand of a young buck can easily exceed what is provided by it natural environment. Research indicates that young, growing deer during antler development need a diet that is approximately 16% crude protein in order to maximize antler growth. Mature bucks can maximize antler growth with as little as 10% crude protein.
Planting and maintaining warm season food plots is a good way for a deer herd manager to help prevent any nutritional limitations to antler growth. Food plots are often thought of in terms of their ability to attract deer to a specific location during hunting season. However, if properly utilized food plots can have a lasting positive effect on an area’s deer herd and other wildlife. Follow the links for the basics on food plot establishment and soil fertility management.
If your goal is to increase the amount of protein available to the deer herd then legumes are your best bet. Some warm season legumes that do well in the panhandle include Aeschynomene, Alyceclover, Cowpeas, Soybeans, Lablab, and Perennial Peanut. It is important that you select species and varieties that are suited to the conditions (especially soil properties) of the area you intend to use them. It is also recommended that you plant a variety of species in any food plot.
The species listed vary in terms of grazing tolerance and recommended planting technique. Contact your county’s extension office for more details.
Legumes provide high amounts of protein to deer and other wildlife because they contain relatively high amounts of nitrogen. Due to a symbiotic relationship with a specific type bacteria, legumes are able to utilize atmospheric nitrogen. Other plants are dependent solely on soil nitrogen. To ensure that the proper bacteria is available to the legume it is important to inoculate legume seeds prior to planting. Inoculants are available through most seed dealers. Be sure that you get the proper inoculant for the species you are planting. Aeschynomene, Alyceclover, and Cowpeas all require the inoculant for the cowpea group. Soybeans and Lablab each have a species specific inoculant. Perennial Peanut does not require inoculation because it is not planted from seeds. Additional information about inoculants, planting techniques, and fertilization is available from your county’s extension office.
Planting food plots does not guarantee any additional antler growth but it is one way to help alleviate a possible limiting factor. Habitat improvement and additional available nutrition can benefit the entire ecosystem. If you want to get the most out of your property, in terms of deer production, it is important to provide the deer what they need all year long, not just during hunting season.
