How To Save My Watermelon Peperomia Brown Spot?

Written by Ivy

Jan 04 2022

How To Save My Watermelon Peperomia Brown Spot?
Brown Spot on Watermelon Peperomia leaves often caused by Pest Infestation, Temperature Issues, Too Much Fertilizer and Too Strong Light. Brown spot on Watermelon Peperomia leaves may be sunburned by too strong light, which can only be exposed to scattered light. If Watermelon Peperomia are exposed to strong light for a long time, it is easy to be burned, and the leaves will produce brown spot.
We should move Watermelon Peperomia to a ventilated and cool place as soon as possible, and sprinkle an appropriate amount of water to make it recover as soon as possible. It may also be excessive watering, like humid environment, but not waterlogging resistant. If you water too much, ponding will hinder root respiration and rot roots, resulting in brown spot. We should clean up the plants, trim the rotten roots and replant them as soon as possible.
Read More:
How Much Light Does Watermelon Peperomia Need?

Pest Infestation

Watermelon Peperomia has small chlorotic spots, and then expands into a circular or near circular 5~ 10mm brown spot. In the later stage, small black spots appeared on the disease spots, severe disease spots fused and the leaves dried up. The pathogen Phyllosticta sp. is called a leaf spot mold, which belongs to a semiintellectual fungus. The conidia apparatus is buried under the host epidermis, brown and oblate, and conidia are produced on the inner wall. Conidia elliptic, single celled, colorless. Watermelon Peperomia overwinters on the diseased part or residual body with mycelium or mycelium block, and conidia are produced the next year for primary infection and re infection. The temperature is 22-28 ℃, and the relative humidity is higher than 85%. Sometimes under dry conditions, but microclimate or long duration of night dew condensation in shed can also lead to brown spot.
  • Prevention Methods:
(1) With careful management, if conditions permit, we can adopt shading and rainproof cultivation, timely water after planting, and pay attention to ventilation and humidity reduction to reduce brown spot brown spot.
(2) In the early stage of the disease, we can start spraying 600 times of 27% copper suspension or 800 times of 47% garenon wettable powder. 800 times of cyclohexyl zinc emulsion and 500-600 times of 40% chlorothalonil suspension shall be used for prevention and control for 1 ~ 2 times.
How To Save My Watermelon Peperomia Brown Spot

Temperature Issues

The root system of Watermelon Peperomia is in a weak state after colonization, and Watermelon Peperomia should be maintained through water and fertilizer management. If it is in the environment of high temperature and drought at this time, the absorption of water and fertilizer in the root of Watermelon Peperomia will be affected, resulting in leaf malnutrition and yellow leaves. If it is caused by this reason, it is necessary to spray leaf fertilizer as soon as possible and water it in time to promote the seedlings to recover as soon as possible.

Too Much Fertilizer

Watermelon Peperomia has brown spots, which may also be caused by drug or fertilizer damage. If the amount of fertilizer is improper, the plant is easy to produce drug or fertilizer damage. If the treatment is not timely, it will lead to yellow leaves, and spots will be left on the leaves of Watermelon Peperomia. Once drug or fertilizer damage is found, it must be diluted with clean water in time, or appropriate leaf fertilizer or growth regulator shall be applied, and then middle tillage shall be carried out, and remedial measures shall be taken.


Watermelon Peperomia Brown Spot may also be infected with anthrax. After Watermelon Peperomia is infected, it will harm the leaves. There will be brown spots on the leaves, wheel shaped black spots on the leaves, and even the leaves will fall. Once infected with this disease, it will not only harm the leaves, but also affect the results. After the disease is found, we must spray drugs as soon as possible. In the early stage of the disease, we can spray drugs such as mancozeb, Difenoconazole, thiabendazole, thiabendazole, prochloraz and so on. In addition, when cultivating, we should choose varieties with strong disease resistance and mix seeds with drugs before sowing, which can improve disease resistance and reduce diseases.

How to Maintain the Markings of Watermelon Peperomia?

  • Proper Fertilization
Watermelon Peperomia is the key to maintain speckle fertilization. Watermelon Peperomia needs to apply thin cake fertilizer and water or all element fertilizer once a month. If there is too much fertilization, especially when there is too much nitrogen fertilizer and lack of phosphorus fertilizer, it is easy to cause the disappearance of leaf speckle and reduce the viewing effect of Watermelon Peperomia.
  • Sufficient Watering
Watermelon Peperomia needs sufficient water to maintain its spots. In summer and dry seasons, it is necessary to spray water on the leaf surface 2-3 times a day and spray water on the ground around the flower pot to maintain high air humidity, which can promote the formation of leaf spots.
  • Reasonable Illumination
Watermelon Peperomia needs reasonable care to maintain its spots. To cultivate Watermelon Peperomia, it is best to move it outdoors in spring and autumn, put it in a place with good ventilation and a little sunshine for maintenance for a period of time, and then move it back indoors. In this way, the plant grows healthily and the spots on the leaves are obvious. The markings on Watermelon Peperomia leaves are the fundamental reason for improving Watermelon Peperomia. It is these markings that make Watermelon Peperomia unique.