Which group of plant diseases is tridemorph fungicide most effective against?

-✅Explanation: Tridemorph is a fungicide belonging to the morpholine class. It is primarily used to control powdery mildew, a fungal disease that causes white powdery patches on leaves and stems of various plants.
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📌Other Options Explanations:
-(b) Downy mildew: Downy mildews are caused by oomycetes, which are related to fungi.
-(c) Wilts: Wilts are caused by various pathogens, including fungi, bacteria, and nematodes.
-(d) Leaf curls: Leaf curl can be caused by viruses, insects, or fungal pathogens.

🔑Key Points:
-Powdery mildew can be controlled using Bordo mixture and Suplhur. 
-Bordeaux mixture (also called Bordo Mix) is a mixture of copper(II) sulphate (CuSO4) and quicklime (CaO)used as a fungicide. It is used in vineyards, fruit-farms and gardens to prevent infestations of downy mildew, powdery mildew and other fungi.
-Sulfur is an element that exists in nature and can be found in soil, plants, foods, and water. … Sulfur can kill insects, mites, fungi, and rodents.

🛑 Additional Information::
-Powdery mildew (Sphaerotheca pannosa) a fungus that produces airborne spores from infected stems or buds on roses.Infected leaves may be distorted, and some leaf drop may occur.
-After overwintering on plants, the disease is most likely to flare up if the roots are in dry soil and the leaves are in humid air conditions.Flower buds may fail to open and those that do may produce poor-quality flowers.