Root Rot in Basil

Root Rot and Basil

• Most forms of root rot occur because of soil-inhabiting fungi. Some fungi known to cause root rot include Rhizoctonia solani, Fusarium, and Pythium. The fungi cause the roots to stop functioning, cutting off nutrients to the rest of the plant. These fungi need moist cool soil to grow in and can spread through the plant's root system within 7 to 10 days, resulting in the death of the plant.

Symptoms of Root Rot

• When basil plants become infected by root rot, symptoms begin to appear early. Plants affected by root rot will often wilt and not recover. Lower foliage may turn yellow or drop off the plant. The roots of the plant will appear brown and mushy, unlike healthy roots that appear firm and tan in color.

Preventing Root Rot

• Taking steps to prevent root rot can save the lives of plants because once it has taken hold, root rot can be very hard to overcome. According to the University of Minnesota, over watering plants cause most cases of root rot in house plants. To defend against root rot make sure the basil's planting container has adequate drainage. Soils too high in clay will not drain water way effectively, and more porous soil mixes will provide the best drainage.

  Proper care for basil plants can prevent root rot. Basil plants do not like too much water. They also do not like the cold, and grow best with temperate soil instead of cool soil.

Controlling Root Rot

• If caught early, basil can be saved from root rot. If root rot symptoms appear, examine the roots for signs of decay. The plant should be re-potted in new soil and a clean container. While re-potting, trim away any decayed roots. Do not reuse the infected soil for any other plants. Containers can be disinfected by soaking them in 1 part bleach to 9 parts water for 30 minutes. If root rot has spread too far, the plant and soil should be discarded away from other plants.