Diseases and Pests of Euphorbia pulcherrima and Their Control

Physiological diseases of Euphorbia pulcherrima

First: No flowering

Although the modified stems grow very luxuriantly, they do not bloom. This is caused by the physiological condition of the plant.

If there is not enough sunlight and too much nitrogen fertilizer is applied, it will easily cause the leaves to grow too long, which is not conducive to the differentiation of flower buds. In addition, too much watering will prevent the full utilization of carbohydrates, which will cause the germination growth to stagnate.

Second: Abnormal stem yellowing

If the abnormal stem turns yellow, it may develop into chlorosis or even burn the skin in severe cases. This is often caused by the incorrect placement of the flower pot, which is exposed to direct sunlight.

Prevention and treatment methods

In spring and autumn, be sure to place it outdoors in a sunny place for maintenance;

In the hot summer, it should be placed in a well-ventilated, semi-shaded place to facilitate growth.

In summer, you can also keep it in a place with scattered light indoors, but be sure to open the windows frequently for ventilation to help the plant breathe smoothly. We should also pay attention to preventing and controlling the damage caused by pests and diseases such as red spider mites and scale insects.

Diseases and pests of Euphorbia pulcherrima

Euphorbia pulex often suffers from stem rot, brown spot disease and root-knot nematodes, all of which can cause damage to the plants, so timely prevention and control are necessary.

Prevention and treatment methods

For the damage caused by pests and diseases, you can directly spray with 1000 times diluted 50% carbendazim wettable powder;

Root-knot nematodes can be controlled by watering with 1000 times diluted 80% dibromochloropropane emulsifiable concentrate.

If ventilation is poor, it is more likely to be harmed by aphids, scale insects and red spiders. At this time, you can spray them with 1000 times diluted 50% carbofuran emulsifiable concentrate.