Pest and Diseases of Anthurium
Diseases of Anthurium:
This is the most damaging discease of Anthurium, cause by Colletotrichum gleosporioides. Also known as spadix rot or black nose and it are a problem in high rain fall areas.
Maneb at 2 1b/100 gal and dodine or dyrene at 1 lg/100 gal gave good control of the disease.
Root rot of A. Andrenum, incited by Pythium splendens often causes serious losses in Pucrto Rico, especially during rainy season. This disease can be controlled by a soil application of PCNB (Quintozene) 8 oz/50 gal water.
Leaf spot disease is caused by Septoria anthuri and controlled by sprays of 300 g carbileen (zineb) in 100 liter water, repeated at interval of 2-3 weeks.
This disease, caused by Erysiphe communis, was first reported on Anthurium scherzerianum grown in Germany. Treatment with 0.1 % bonomyl casily controls the discase.
Pests of Anthurium:
These insects suck the plant’s sap cause yellowing and distortion of leaves and poor growth.
Systemic insecticides containing dimethoate and Malathion (0.2%) effectively control the aphids.
Scale and Insect:
Scale insects infest stems and leaves, suck the sap and weaken the plants. Wiping the insects off the plants with a cotton-wool swab soaked in methylated sprit or spray with 0.2% Malathion work well against these insects.
These minute mites cause yellowish mottling of the leaves which may become brown and shrivel. Spraying of affected plants with 0.2% Malathion or kelthane (8 ml in 10 liters of water) was found to be very effective to control the mites.
Thrips suck the sap form leaves and cause a mottled effect on foliage and flowers. The control mensures are similar to those of aphids and scale insects.