establish on your description , it seems that your Satsuma tree is suffering from several coarse fungal diseases . Let ’s take a closer facial expression at each one and discourse how to address them efficaciously .

1 . Sour Orange Scab : Sour Orange Scab is a fungous disease characterized by raised , scaly lesions on the yield ’s control surface . To moderate this disease , consider practice a copper - based antimycotic during the tree ’s dormant stop in late winter or other spring . Be certain to follow the education on the fungicide recording label for right covering and dosage .

2 . Brown Rot : Brown Rot is another fungous disease that affects citrus fruits , causing them to waste and evolve a fuzzy brown mold . To combat Brown Rot , it is crucial to exercise good sanitization by removing any septic fruit from the Sir Herbert Beerbohm Tree and the earth and fling of them properly . Additionally , applying a copper - based antifungal during the fruit development stage can help forestall further infection .

3 . Greasy Spot : Greasy Spot is a fungous disease that appear as buttery , disconsolate dark-brown spots on the farewell of citrous fruit tree diagram . This disease boom in warm and humid term . To check Greasy Spot , it is essential to maintain good airflow by prune your tree to tolerate sun to penetrate the canopy . Applying a copper - base antimycotic agent during the tree diagram ’s inactive period can also help prevent the disease from fan out .

4 . Anthracnose : Anthracnose is a fungal disease that causes sunken lesions on the fruit ’s cutis , which finally rick black and crusty . To handle Anthracnose , it is crucial to remove any infected yield from the tree and the ground and dispose of them decent . implement a copper - based fungicide during the tree diagram ’s dormant period and following right tearing exercise can also facilitate prevent further infection .

5 . Sooty Mold : Sooty Mold is a black , powdery fungus that grows on the surface of parting and fruit . It is often a symptom of worm infestations , peculiarly aphids , scales , or whiteflies , which excrete a sticky essence called honeydew that serves as a food generator for the mold . To address Sooty Mold , it is crucial to ascertain the underlie insect problem by enforce appropriate insecticides or using biologic controls . Once the dirt ball are under control , the jet mold should step by step disappear .

It is common for Satsuma trees to experience fungal diseases such as Sour Orange Scab , Brown Rot , Greasy Spot , and Anthracnose . apply a copper - based antimycotic and practicing good sanitation and cultural practices can help oneself manage these diseases in effect . to boot , address any insect infestations that may be causing sooty mold will help restore the health and vitality of your Satsuma tree . think back to always follow the instructions on the product labels and consult with a local horticulturist or propagation service for specific recommendation for your area .

Caroline Bates