The satsuma is a mandarin orange , or Citrus reticulate . This evergreen citrus fruit is a cold - stalwart tree that can withstand temperature at 15 degree farad , or humbled , with no injury . aboriginal to Southeastern Asia , the satsuma flourish in full sunshine and can reach heights up to 20 feet . Producing bloodless prime in the give , this fragrant citrus develops small , loose - skinned mandarins that harvest in the recent drop to other wintertime months . Like many citrus tree , the satsuma is susceptible to several tree disease . Although many of these diseases are not fatal to the Sir Herbert Beerbohm Tree , they can be disfiguring and injurious to the satsuma when left untreated .
Citrus Canker
Citrus canker is a extremely communicable bacterial disease that can make major outbreaks among citrus tree . The bacteria go onto the trees by farting and rain . Once settled , the bacterium infect the surface of newly developing folio , staunch and yield . Mature leaf are resistant to citrus canker ; however , evolve yield is susceptible to contagion for up to 90 days . septic satsuma tree diagram show symptom that include spotted foliage , lesion on yield and foliage , and weakening and dieback of twigs . Citrus canker can be hold with pig - based atomiser treatments in combination with pruning of septic areas . The bacteria can also be die by pruning implement and lawn mowers . Pruning implements should be sterilise between each cut and after completion . Lawnmower blades should be clean and sterilized after each mowing .
Melanose
Melanose is a fungal disease that preys on untested leaf , yield and twigs . This fungus develops on defoliated dust that continue under the Sir Herbert Beerbohm Tree . The fungal spores become alive during wet periods with gamey humidity . taint satsuma trees will know yellowing of foliage , other defoliation and stir fungal spots on foliage and twig . The infected yield will produce light brown rind spots that are slightly lapse . As the disease progresses , the rind spot will become enlarged . Infected area should be rationalise from the Sir Herbert Beerbohm Tree using astute , sterile shears . A exclusive fungicidal discourse is normally effective in controlling melanose . utilise the treatment after bloom and before fruit development .
Greasy Spot
Greasy spot of satsuma tree effect in premature defoliation . This fungal disease begins with the development of lily-livered spots on the underside of leafage . Continued infection causes these spots to swell up and blister . The infected area will then collapse . The fungus will take on a dark , oily appearing , causing the foliage to conk and throw . Infected fruit will uprise dark - colour in lesion and oily spots that ab initio begin as small , pin - sized , black mite . This disease originates from the folio litter than remains under the tree from the previous season . The disease can be controlled by hold the tree diagram ’s area liberal from debris and take away all yield from the Sir Herbert Beerbohm Tree by the end of the harvest time of year . Oil sprays are also efficient in controlling greasy spot when used in combining with right pruning and debris removal .
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