It comes with rain, Algal Spot..
..If it "RAINS"
It will "EAT" Your plants..
Algal Spot It likes high humidity climates.
Its spores can spread by wind and rain.
Spread well in opaque plants…
Algal Spot therefore, The epidemic is prevalent in the rainy season. Causes of Algae Spots…
caused by green parasitic algae(Cephaleuros virescens Kunze)
Symptoms on the leaves are seen as light grayish-green spots. The spots are raised from the leaf surface.
The edge of that point will look radial not smooth.
This tiny dot grows larger in high humidity climates and enough sunlight.
As the algae mature, it turns red like iron rust like velvet.
Appear rust spot when it spreads and scatters to different parts of the plant.
- If rust spots appear on the leaves will reduce the photosynthetic area of the leaves and also suck the sap from the leaves of the plant this causes the leaves to turn yellow and fall.
- If rust spots appear on the branches It will look like red velvet or rust brown.
- If it is a lot, there is a high chance that the plant will deteriorate.
Branches that are exposed to light become scaly.
Later, the scabs dry up and the branches are destroyed.
At the site of destruction, the bark cracks and dries,
yellowing of the leaves.
Algae spots were found in Durian, Longan, Mangosteen and Canopy.
Basic precautions
- Always check the tree for symptoms. At least once a week during the heavy rain or the rainy season.
- Collect diseased leaves or diseased parts. Both on the trees and fallen in the garden to burn and destroy.
- When the old leaves are found to be severely damaged,it is recommended to use Copper Oxychloride 85% rate 50 gram / water 20 liter or substances in the group Copper Sulphate Spray the leaves
all over the plant or periodically injected.
It is not recommended to spray during flowering.
During flowering can use substances in the group Propineb to eliminate or reduce the number of infections.
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