I know that I am not the only one who has had this disease on their peppers. It appears in the late spring to summer when we have had frequent rainfall. Of course, if you are overhead watering, you would see it as well. Bacterial leaf spot on peppers can be a devastating disease if not caught and treated early. This is why I always preach that your garden needs to be in sight of your house so that you can check it often. This disease is often fatal once [...]
The vast majority of diagnostic questions I receive each year are related to trees with health issues. Many of these issues could be avoided by proper (and consistent) care of the tree from the day it is planted. Sometimes things do go wrong, and knowing what to do can be instrumental in reviving the health of a tree. Trees have the amazing ability to “compartmentalize” diseased and damaged tissue, and to produce healthy tissue around it. If a tree has been stressed by environmental issues such as compaction in the [...]
There are few things that we can do in the garden when it is 105°F outside, but there is ONE thing that we can do BEST when it is this hot. Soil solarization is a method that is used to kill weeds seeds, insects and disease that are in the soil prior to planting. The goal is to heat the top six inches of the soil to a temperature between 110° and 125°F for four to six weeks. These high temperatures are enough to kill most annual and perennial weed [...]
Many times, the first time you see a tree “leaking” will be when insects such as Green June Beetles or Hackberry Butterflies are attracted to the fluid seeping out of the trunk and draw your attention to it. Bacterial Wetwood, also known as Slime Flux, is a bacterial disease that can affect a variety of tree species, such as oak, elm, mesquite, maples, and others. Bacterial Wetwood occurs when bacteria infect the wood of a tree, usually through a wound in the trunk, limb, or [...]
For the third year in a row, Bradford Pears have been blooming during a rain event! Why does that matter, you ask? Because a very bad guy, a bacterium called Erwinia amylovora, or Fire Blight, enters the plant through the flower via splashing water. What are the symptoms of Fire Blight? The first symptom to appear, shortly after bloom, is a blossom blight. The flower will appear water-soaked, then turn black. The most obvious symptom of this disease is the shoot blight phase, in which the tip of the shoot [...]
Anyone who has planted Periwinkle, or Annual Vinca, in the spring in Central Texas will tell you “that plant always dies when I plant it”. Well, there is a reason for that! Periwinkle, especially in the “old” days, before resistant varieties were available, was never grown until the cool wet weather of spring was behind us. It absolutely thrives in the scorching hot summers, but give it rain and cool weather, and disease takes over! Phytophthora fungus is the causal organism for [...]
Tomato Tips Timing: Plant as early as possible in Central Texas. Buy your transplants in February and transplant them to 1-gallon pots which you can move in and out according to the temperature. Tomatoes will not do well below 55 degrees but can be set out in the sun during the warmer days until mid-March, when they can be planted directly into the garden. Your plants will likely have flowers and fruit on them when you set them out! Container or In-ground: Containers should be a minimum of 15 [...]
Those of you who have heard the adage “February through June DO NOT PRUNE” probably know that it is in reference to the spread of Oak Wilt in relation to the timing of pruning of susceptible trees. With Oak Wilt appearing in so many locations in Central Texas, it is safer to complete pruning by February 1st, before the temperatures become milder and the Nitidulid Beetle begins to become active after the winter. This beetle is responsible for transmitting the Oak Wilt Fungus from fungal mats on Red Oaks to [...]
Nutrient deficiencies Iron deficiency is common in areas with calcareous soils and alkaline water. The iron may be present in the soil, but it is in a form that is unavailable to the plant when grown in alkaline conditions. Deficiency occurs on young leaves, and the veins remain green while the rest of the leaf is yellow. This condition can cause dieback of limbs and small fruit. Iron deficiency is also associated with excessively wet soils or prolonged wet conditions, as this depletes the root system and uptake of nutrients [...]
Rose Rosette Disease was first identified in wild roses in the 1940’s in California, the Rocky Mountains, and Manitoba, Canada. In 1990 the disease appeared in East Texas, and by the mid-1990’s infected plants were located in the Dallas-Fort Worth area. In 2015, the Fort Worth Botanic garden replaced all their roses due to infection by the Rose Rosette virus. Rose Rosette Disease is a lethal disease of roses, and has been determined to be caused by a virus. It has no known treatment or cure. The disease is spread [...]
We now have available to us a wide range of oil products to use as alternatives to synthetic insecticides and fungicides. These include oils distilled from petroleum and oils extracted from plants and animals. Petroleum oils (including mineral oils) are highly refined, paraffinic oils that are often referred to as horticultural spray, summer oil, spray oil or white mineral oil. We recommend Bonide “All Seasons Spray Oil” for late winter insect and disease control. (The antiquated term “dormant oil” referred to the heavier, less refined oils produced in the past [...]
Many of you are concerned about your lawns right now, as large brown areas are starting to show up as the summer heats up. I would encourage all of you to do an irrigation audit first, to determine if it is water-related. Never “assume” that all is being watered equally. Instructions for an easy, DIY irrigation audit can be found HERE. There are certain lawn issues that show up at specific times of the year, and there are specific times to treat them. For instance, we only see chinch bugs in [...]
