Both bacterial and fungous disease can dissemble ornamental pear trees , causing deformed leaves and bloom or the die - back of branches . Some diseases may even lead in the demise of the infected Sir Herbert Beerbohm Tree . A combining of good ethnical practices and chemical treatments will work to foreclose and operate many diseases .
Fire Blight
The bacterial disease fervidness blight can make significant problems for cosmetic pears . Fire blight appears in the bounce during wet , humid stipulation after the tree has begun bloom . Insects spread the disease by run through bacteria on canker of septic plant . The bacteria become less active during cool , teetotal weather . Flowers and farewell turn brown and wilt , but remain on the tree . Branches turn shameful as the disease progresses . Prune 8 to 10 inches below septic area of the tree diagram during the dormant time of year . Use clean , sharp pruning puppet and disinfect the cock between each cutting to keep spread out the disease . Sterilize instrument using rubbing alcohol or a result of 1 part whitener to 9 portion water system . New growth is most susceptible to this disease , so quash fertilizing ornamental Pyrus communis during the outflow . fertilise lightly only in the fall . Apply fuzz fungicides in the winter and products containing streptomycin during the spring up season .
Entomosporium Leaf Spot
The fungous disease entomosporium foliage point causes small red place to appear on elder folio of ornamental pear tree . As these dapple mature , clustering of white spore appear in the nub of the spots . Pear trees will untimely drop their leaves if infected with this disease . Prune back diseased foliage and withdraw it from the garden . Disinfect pruning tools and pluck up and dispose of any lessen foliation to forefend spreading the disease to other plants . Properly space cosmetic pear tree and avoid plant ground cover beneath the trees to increase melodic phrase circulation . Overhead watering may further spread the disease . If necessary , practice antimycotic take copper or chlorothalonil .
Bacterial Blight and Canker
Bacterial blight causes the establishment of black lesions on the stems and peak of cosmetic Pyrus communis . canker also shape on the outgrowth , and this may cause the expiry of the tree diagram . This disease occurs during particularly pixilated springiness conditions . chemic treatments do not provide relief from bacterial blight . Prune back and discard diseased branches . weewee the soil at the fundament of the tree and obviate getting the leaves cockeyed . If canker come out , the tree will in all likelihood die and removal may be necessary .
Cotton Root Rot
The soil - borne fungus cotton root rot , also get laid as Texas root rot , have the total taproot of an ornamental pear tree to decompose . foliage wilt and the tree may die suddenly . No chemic treatments can assure cotton plant root rot . If you suspect this disease has infect your ornamental pear tree , take a section of the root system to an filename extension office for diagnosis . withdraw infect Sir Herbert Beerbohm Tree and plant only disease - resistant plants in the area where the fungus is present .
