Apply an all-purpose fungicide to the entire plant, following the label instructions carefully.Scientfic Name: Castilleja integra Common Name: Wholeleaf Paintbrush, Wholeleaf Indian Paintbrushĭescription: Wholeleaf paintbrush is one of the universally recognized and adored wildflowers of the southwestern U.S. Copper penetrates the leaf surface and prevents germination of spores so the fungus cannot spread. Reapply as directed on the product label. Spray a copper-based fungicidal soap on the leaves, coating the top and bottom leaf surfaces. Repeat every two weeks until existing spots stop enlarging and new spots no longer appear. Using a spray bottle, spray on tops and bottoms of leaves until the mixture drips off. Dissolve ½ teaspoon of baking soda and one teaspoon of liquid soap in a gallon of water. Organic options won’t kill the fungus, but will prevent it from spreading. It is recommended to start by applying organic treatment options, working up to the more potent synthetic, chemical fungicides if necessary. However, if much of the foliage is affected and defoliation occurs, the plant will benefit from getting rid of the infection. Solutions: In minor cases of brown spot, there isn’t any need to treat the disease. The best solution is to remove the infected plants and dispose of the plant material off-site. If the plant is infected with a bacterial or fungal pathogen, there is no course of treatment that cures the diseased plants. Keep it off the leaves and make sure granular products are watered into the soil well. In the event of nutritional deficiencies, the best solution is to use a granular or water-soluble liquid fertilizer, and apply it to the soil at about half the recommended dosage. Water container plants until excess water drains out the bottom water in-ground plants until the soil is soaked but there isn’t standing water on the surface. For lack of water, immediately water the plant using room temperature rainwater, bottled spring water, or filtered tap water. Once hormones within the plant begin the process of senescence, it’s irreversible. Solutions: If flower withering is a natural progression due to age, there is nothing that can be done to slow or stop the process. Apply an all-purpose fungicide to the entire plant, following the label instructions carefully.

Paintbrush plant size