Avoid over-watering, as coleus can develop root rot and fungus diseases quickly in poorly drained soil. Coleus plants prefer well-draining soil to help prevent overwatering and root rot. Plants should be pinched only as needed since … The most commonly seen problem with coleus is root rot, caused by overwatering, especially in the winter months. Among them, the most challenging disease is dry root rot which is caused by Macrophomina phaseolina.The growing use of chemical fertilizers has been witnessing the grave consequence of global economic imbalance as well as environmental pollution. When using rooting hormone, always follow the directions on the label. Root-rot/wilt disease of C. forskohlii Root rot/ wilt is the major disease of C. forskohlii causing heavy losses (>50%) in south India. Discolouration and rotting of roots are the prominent symptoms. Content validator and Image source: Wetting the foliage while watering and excessive soil moisture can lead to these disease problems. Dipping stem cuttings in Pseudomonas fluorescens @ 2 g/1 lit of water for 20 minutes followed by drenching with P. fluorescens @ 2 g/1 lit on 30 days after planting.. When you plant your coleus, water them until the soil is saturated. Lastly, management is difficult because soil treatments are ineffective. Coleus plants prefer soil that is moist and well-draining, not waterlogged or flooded. Generally, coleus rapidly grow to their full summer size. How to Water and Fertilize Coleus. The symptoms observed were yellowing and drooping of the leaves, blackening of the stem, rotting of the root, basal stem and peeling of stem bark and root epidermis. Once you have completed repotting the plant, give it a heavy watering and then, continue care as normal. Types Of Coleus Ornamental Coleus Varieties (aka Plectranthus scutellarioides, Solenostemon scutellarioides, or Coleus blumei) There’s so many ornamental varieties of this fascinating plant that I can’t show them all. As noted above, coleus roots easily, so rooting hormone isn't a must; however, it does tend to promote success. Growing Coleus. ... Close-up of stem rot on coleus (Solenostemon) Orange-colored fruiting bodies of Calonectria sp. Root rot is a disease caused by a variety of fungi/bacterium species that love standing water. Diseases: Root rot. In June–July 2003, coleus grown in Vilupuram, Salem and Erode districts of Tamil Nadu suffered heavy losses due to a disease. Leaves yellow and wilt; Plants are stunted ; The base of the stem may turn brown and crack; Roots have brown sunken areas and lack root hairs; Disease common in wet, poorly drained soil; Lab analysis needed to determine which pathogen is causing the rot; More information about Rhizoctonia root rot The roots then die back due to lack of oxygen or the overgrowth of a soil fungus. Management. Make sure to fertilize just once a month with a balanced … Some of the more severe pathogens are those that can persist for long periods without a living host. Use a mixture that contains plenty of perlite, which will help to ensure the soil drains well as well as aerating it. Comments: Lava Rose Coleus will generally not require any PGR applications during production. Dip the Cut Ends of the Stems in Root Hormone Powder. Root rot: Rhizoctonia bataticola Symptom. Medicinal coleus (Coleus forskohlii) is a member of mint family Lamiaceae.The crop is affected by many diseases. 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