Algalleafspot is sometimes called green scurf because the spots may have a crusty, fuzzy or flaky appearance. Symptoms and Diagnosis. Algalleafspot is characterized by grayish, green, brown or orange cushion-like blotches on the leaf surface. Algalleafspot disease spores, which are spread by rain, create a big problem for more than 200 plant species, especially plants growing in warm, humid climates. Learn more about this disease and how to treat it in this article. Algalleafspot is a foliar disease caused by algae, primarily affecting tropical and subtropical plants. The main culprit is usually Cephaleuros virescens, a parasitic green alga. While it rarely causes serious harm, it can affect the aesthetics of your plants. Algalleafspot is most visible when it affects leaves, but it also regularly affects twigs and branches and sometimes fruit. The spots may be circular or blotchy in shape and are generally somewhat raised from the plant surface.Table 1. Copper Fungicides for AlgalLeafSpotControl. Algalleafspot is most visible on affected leaves. Look for raised, wavy, cushion-like spots that are greenish, pinkish or grayish and less than 1 cm. in diameter. It affects magnolia, camellia, holly, and many other plants. Algaecontrol on plants has been tested using a variety of “fungicides” including the copper products (such as Camelot, Kocide and Phyton 27), dithiocarbamates (such as Dithane or Protect) and quaternary ammoniums. 5. Control and Management Plan for AlgalLeafSpot. Following our discussion on the impact of algalleafspot, here is a detailed plan for its control and management in oil palm plantations. Discover Pinterest’s best ideas and inspiration for How to treat algalleafspot. Get inspired and try out new things.What Is AlgalLeafSpot: Learn About AlgalLeafSpotControl. Algalleafspot is easiest to identify on leaves, but it can affect twigs, branches, and fruit. Signs of algalleafspot on magnolia trees include: Raised, wavy, cushion-like spots that can appear circular or blotchy. Edges of spots may be wavy or feathered. Rubber Plant AlgalLeafSpot. Symptoms. Control and Management.The rubber plant algalleafspot is caused by parasitic algae called Cephaleuros virescens. It thrives in warm, humid conditions. It’s sometimes known as green scurf. The fungicide azoxystrobin + benzovindiflupyr (Mural; Syngenta) effectively controlledalgalleafspot severity and disease progress in both experiments.The control treatment included the nontreated naturally infected plants with algalleafspot (nontreated control). Algalleafspot is caused by Cephaleuros virescens, which is a widespread plant parasitic green alga. There has been little research on how to treat algalleafspot on magnolia plants.Peanut disease control, p. 96–97. effectively controlledalgalleafspot resistance to active ingredients. In both experiments, all treatments reduced algalleafspot disease severity and disease progress in comparison with the nontreated control. You can controlalgalleafspot with copper fungicide, such as this one from Bonide that’s available from Arbico Organics.
