Clivia "heart rot" prevention and control tips and methods for identifying edible fungus diseases
After a Clivia plant finishes blooming, improper handling of the flower stalk can easily cause the plant to develop heart rot: during hot seasons, due to watering mistakes, dirty water flowing into the leaf rosette causes the Clivia plant's central leaves to rot and die: fertilizer that has not been fully decomposed causes Clivia's central leaves to rot.
Cause analysis: First, after flowering and setting seed, the soon-to-wither flower stalk is not properly handled, so the sap flowing out after the flower stalk breaks accumulates in the leaf rosette, causing the central leaves to rot. Second, during hot seasons, dirty water is allowed to flow into the leaf rosette during watering, causing heart rot. Third, improper fertilization: undecomposed organic fertilizer damages the growing point in the central leaf rosette and causes heart rot.
Prescription:
① For heart rot caused by improper handling of the flower stalk, note that after the Clivia flowering period ends there is a short growth pause; watering should be reduced, keeping the soil only slightly moist. Cut off the withered flower stalk, and promptly use clean toilet paper or absorbent cotton to blot up the sap that flows out. During the entire process from the remaining flower stalk withering to new leaves emerging, do not pour water into the leaf rosette.
② For heart rot caused by dirty water, take the plant out of the flowerpot, shake off the old soil and rinse it clean. Thoroughly remove the rotted parts, then use 75% alcohol cotton balls to repeatedly wipe the heart rot wound and its surroundings clean. Repot it in plain soil, burying it only to the root crown. Keep the potting soil slightly moist, place it in a cool, semi-sunny spot, avoid rainwater pouring into the leaf rosette and causing heart rot again, and no longer spray water on the leaves; you may use a damp cloth to wipe away dust attached to the leaf surface. Only when the new bud leaves have grown to 5cm~8cm long may normal water and fertilizer management be resumed.
③ For heart rot caused by subsequent fermentation of undecomposed organic fertilizer, the plant with heart rot should be removed from its pot, its rotted roots and leaves cut off, washed clean with clear water, and then its roots soaked in a 0.3% potassium permanganate solution for 2 hours. After taking it out, air-dry it in a cool place for 12 hours, then plant it in sterilized fresh potting soil; it can be expected to sprout and grow new leaves again.
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