Powdery Midew is a type of crop disease which affects crops like Carrot, Cucumber, Okro, Tomato, Hot pepper, Sweet pepper, etc.
This fungus brings out a white powder on older leaves from the bottom lower and elder leaves through the youngest at the top of the plant. It is favored by a very high relative humidity and large temperatures variations between day and night and is spread by the wind.
Symptoms and Damage
Some of its symptoms include the following:
- Formation of a white powdery film on the leaves. Leaves can dry and become brittle.
- On solanaceae, Leveillula induces yellow then brown spots on leaves and a white powdery apparition on the underside of leaves.
Some of the major ways or measures by which damage can be prevented or controlled include the following:
- Remove weeds and plant residues from the previous crop.
- Practice overhead watering
- Apply preventive sprays with sulfurs and fungicides on the underside of old leaves.
- Sow on raised and well-drained ridges.
Some Varietal solutions include:
Carrot: carrot varieties like: Bahia, Amazonia, F1 Louxor, F1 Japan Cross, Pamela, F1 Talena.
Cucumber: some cucumber varieties like: F1 Antilla (IR), F1 Mondial, F1 Olympic (HR), F1 Tokyo (HR), F1 Tropical, F1 Lina, F1 Nagano, F1 Sirana, F1 Murano.