Late blight background Late blight (Phytophthora infestans) is very destructive under conditions of excessive moisture and low temperatures. Starts as small water soaked lesions which rapidly enlarge with a brown or black colour. Spreads rapidly and total plantings can be destroyed within a week. Late blight symptoms The disease causes severe defoliation of tomatoes and [...]
Botrytis rot (Botrytis cinerea) Botrytis rot (Botrytis cinerea), also known as grey mould, is caused by the fungus Botrytis cinerea, and has become on the most serious diseases of tomato foliage and fruit. The fungus becomes established on dead leaves or stems at the base of the plant. A heavy grey growth of the fungus [...]
Bacterial speck, also known as Xanthomonas campestris pv. vesicatoria, Pseudomonas syringae pv. Tomato. Bacterial speck and spot are very difficult to distinguish from each other. However the control strategies are the same and both diseases attack the above ground organs of the plant. Bacterial speck symptoms Small water soaked lesions which develop during periods of rain, [...]
Never use chemical that are not registered by your local Department of Agriculture. A range of chemicals that can be used on cucumbers are provided below and must be followed to control most insects and diseases found in hydroponic production systems (in South Africa). Please check your local Agricultural extension officer for a list of [...]
Good pest and disease control in hydroponic systems is crucial for a successful hydroponic farm. Soon after the plants have been transplanted, pest and diseases will be attracted to the growth area. It is important to control these pests and diseases in order to harvest a good yield. The registered chemicals that can be used [...]
Not all pesticides and fungicides are equal. They come in a variety of formulations and the seedling grower must know when and where to use them for optimal results. Although seedlings grow for a limited time in a nursery, pest and disease management is crucial to healthy seedlings and plants. If considerable effort has been [...]
