A network that helps people worldwide obtain rapid advice and information on crop protection, including the identification and management of plant pests.
PestNet is a network that helps people worldwide obtain rapid advice and information on crop protection, including the identification and management of plant pests. It started in 1999. Anyone with an interest in plant protection is welcome to join. PestNet is free and is moderated, ensuring that messages are confined to plant protection.
May 2016. A member sent a photo of his clover (Desmodium triflorium) that had dead or dying plants in a wide circle. In the early morning there was a clear wide margin to the area of decay.Could members say what was causing the problem and how can it be prevented.
There were several suggestion as to what might be causing the problem:
(i) Sclerotinia; this fungus produces sclerotia (ii) Rhizoctonia (iii) Atheliarolfsii; another fungus that produces sclerotia; balls of fungus, 203 mm diameter, at first white later brown. (iv) Pythium
Scleotinia has not been recorded in Solomon Islands. Rhizoctonia on Desmodium species is common.
As for control: either dig a trench in front of the plants with decay – but be careful not to drop soil onto healthy parts of the clover, or use a fungicide, and captan and thriam were recommended.